Add to your order

  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it.
  • Quick, easy, and frustration-free claims.
Cover this product:
2 Year Wearables Protection Plan $20.99
3 Year Wearables Protection Plan $28.99
Cover all of your eligible devices:
Asurion Complete Protect: One plan covers all eligible past and future purchases (Renews Monthly Until Cancelled) $16.99/month

Add to your order

  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it.
  • Quick, easy, and frustration-free claims.
Cover this product:
Buy new:
$104.99 $104.99 per Count
FREE delivery Friday, May 17
Ships from: TechStation
Sold by: TechStation
FREE delivery Friday, May 17. Details
Only 1 left in stock - order soon.
$$104.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$104.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
TechStation
Ships from
TechStation
Sold by
Sold by
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. You may receive a partial or no refund on used, damaged or materially different returns.
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Include
Add a Protection Plan:
Sorry, your monthly warranty plan was removed because these plans are currently only available for single-item orders.
Add to your order

2 Year Wearables Protection Plan

from Asurion, LLC
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use are covered from day one. Malfunctions are covered after the manufacturer's warranty. Real experts are available 24/7 to help with set-up, connectivity issues, troubleshooting and much more.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. We will send you an e-gift card for the purchase price of your covered product. In some instances, we will replace or repair it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.

3 Year Wearables Protection Plan

from Asurion, LLC
  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use are covered from day one. Malfunctions are covered after the manufacturer's warranty. Real experts are available 24/7 to help with set-up, connectivity issues, troubleshooting and much more.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. We will send you an e-gift card for the purchase price of your covered product. In some instances, we will replace or repair it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.

Asurion Complete Protect: One plan covers all eligible past and future purchases on Amazon

from Asurion, LLC
  • Buy a lot of stuff on Amazon? Tons of items eligible for coverage, from the latest tech like laptops, game consoles, and TVs, to major appliances, sporting goods, tools, toys, mattresses, personal care, furniture, and more.
  • Accidents happen. That’s why for your portable products we cover accidental damage from handling such as drops, spills and cracked screens. We also cover electrical and mechanical malfunctions, power surges, and wear and tear.
  • Past and future purchases covered. 30 days after you are enrolled, all eligible past purchases (up to 1 year prior to enrollment) and future eligible purchases made on Amazon will be covered by your plan as long as you are enrolled.
  • Fast, easy claims. Frustration-free claims, with most filed in minutes. We will fix it, replace it, or reimburse you with an Amazon e-gift card for the purchase price of your product (excluding tax). File at Asurion.com/amazon.
  • No hidden fees. For just $16.99 a month + tax you’re covered for up to $5,000 in claims per 12-month period. *THIS PROGRAM IS MONTH-TO-MONTH AND WILL CONTINUE UNTIL CANCELED* Coverage for all products ends 30 days after the plan is canceled. Cancel any time.
Comes with everything, damaged box
FREE delivery Thursday, May 16. Details
Or fastest delivery May 13 - 15. Order within 17 hrs 56 mins. Details
Only 1 left in stock - order soon.
$$104.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$104.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from and sold by Tempest Keep Ventures.

Fitbit Flex Wireless Activity + Sleep Wristband, Black, Pedometer, Small/Large

4.1 4.1 out of 5 stars 24,349 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Activity & Fitness Trackers by Fitbit

$104.99 $104.99 per Count
Black
Large (Pack of 1)
{"desktop_buybox_group_1":[{"displayPrice":"$104.99","priceAmount":104.99,"currencySymbol":"$","integerValue":"104","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"okevNNWiKDRoDlbbVtpO5DoaLc6e1F8S%2FFqtgKEiTN%2BKvnh5GGMgF6fUPEX9nV3Id4ikVDTXz1Xo52qsoix1h1IL2jyEkzg6xpAhKScGEsu0t5Zhg%2FZaTIG2MsvnxTMtZDXKUKjXC8IRPfQmDUKsjsgGzjOKO2o%2B%2BIHHP23t5Mywc8Zbo4cQQQ%3D%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$69.99","priceAmount":69.99,"currencySymbol":"$","integerValue":"69","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"okevNNWiKDRoDlbbVtpO5DoaLc6e1F8SNwTpZGwOuH%2Fu0%2FuNZOw73lEEa7PHa2U%2BUiGCY4rrxUl0VNfpucq8mk%2BD509bM27horX5jRsrI6xgQ54f8NW0j6s99T20Zn9TiZcS5UAEPwJ%2F%2FOzqKUFMrwfM1Baaz9OhSIz7UCixIKzT2kr3nZVzqm7uGNHStjPM","locale":"en-US","buyingOptionType":"USED","aapiBuyingOptionIndex":1}]}

Purchase options and add-ons

Brand Fitbit
Model Name flex
Style Size S
Color Black
Screen Size 1.04 Inches
Special Feature sleep_monitor, pedometer, fitness_tracker
Shape Rectangular
Target Audience Unisex Adult
Age Range (Description) Adult
Compatible Devices iPhone 4S and up, Samsung Galaxy S III, iPad mini, iPod Touch (5th generation), iPad 3, Samsung Galaxy Note 10.1, Samsung Galaxy Note II, Samsung Galaxy S4, iPad 4 See more

About this item

  • Rubber
  • Made in USA or Imported
  • One syncs automatically and wireless to tablets, computers and 150+ leading iOS, Android and Windows smartphones using Bluetooth 4.0 wireless technology. Syncing two computers requires Internet connection and USB port. Syncing to mobile devices requires Bluetooth and Internet connection. Syncing range: 20 feet. Call notifications via Bluetooth 4.0
  • Water Resistance: Charge has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking charge off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean
  • Warning: Do not use if you have a pacemaker or other internal, or implanted medical device. Not intended for use by children under 13. Always consult your physician. Slippery when wet
  • We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours. Battery life: up to 7 - 10 days. Battery type: Lithium-polymer
  • Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices

Add a debit or credit card to save time when you check out
Convenient and secure with 2 clicks. Add your card

Buy it with

$104.99 ($104.99/Count)
Only 1 left in stock - order soon.
Ships from and sold by TechStation.
+
$8.99 ($4.50/count)
Get it as soon as Thursday, May 16
In Stock
Sold by EXMRAT and ships from Amazon Fulfillment.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
One of these items ships sooner than the other.
Choose items to buy together.

From the manufacturer


Online & mobile tools

Syncs stats wirelessly and automatically to your computer and 150+ leading smartphones – including Android, iOS and Windows.

Set goals, log food, see progress, analyze trends and earn achievement badges through your mobile and online dashboard.

Share and compete with friends and family on the leaderboard and in NEW Fitbit challenges.

Fitbit Flex

Wireless Activity + Sleep Wristband

This slim, stylish device is with you all the time. During the day, it tracks steps, distance, and calories burned. At night, it tracks your sleep quality and wakes you silently in the morning. Just check out the lights to see how you stack up against your personal goal. It’s the motivation you need to get out and be more active.

  • Activity tracking
  • Sleep monitor + silent alarm
  • Progress display
  • Style + accessories
  • Wear + battery Life
  • Personal dashboard

Activity tracking

Track steps taken, distance traveled, calories burned and active minutes.

Sleep monitor + silent alarm

Automatically track how long and how well you sleep and wake with a silent alarm.

Progress display

See LEDs light up as you progress toward your daily goal.

Style + accessories

Style the slim, removable tracker your way with colorful accessory bands.

Wear + battery life

The Flex is water water-resistant and has a 5-day battery life.

Personal dashboard

The Fitbit app is full of graphs, charts, and tools designed to help you track your progress and better understand your health and fitness.

Customer Reviews
3.9 out of 5 stars
6,318
4.1 out of 5 stars
9,914
4.0 out of 5 stars
16,455
3.9 out of 5 stars
43,222
3.7 out of 5 stars
6,660
Price $125.00 $298.05 $74.50 $139.99
Category Everyday Everyday Everyday Everyday Active Performance
Steps, calories, distance
Clock
Sleep quality & silent alarm
Floors climbed
Active minutes
Caller ID
Continuous heart rate
Music control & notifications
GPS tracking

Product Description

Product Description

Never stop moving with Fitbit Flex. Wear this slim, stylish device all the time and get the motivation you need to get out and be more active. It tracks steps, distance, and calories burned and shows you how you’re stacking up against your daily goals. At night, it tracks your sleep cycle, helps you learn how to sleep better, and wakes you silently in the morning. Access your stats anytime on your computer, tablet or from leading smartphones – both iPhone and Android. Flex is your perfect companion, it’s with you everywhere even in the shower. Plus, it looks good no matter what you’re wearing.

From the Manufacturer

• Certain features like Auto Sleep Tracking and SmartTrack may be disabled when using this accessory. Classic accessory bands are the recommended accessory for high intensity workouts and sleep tracking. • Do not wear the Flex 2 Pendant accessory while sleeping or during high intensity activity, as doing so could create a choking hazard. • Flex 2 Pendant accessories contain magnets. Magnets may interfere with pacemakers, defibrillators, or other medical devices. Consult your physician and the manufacturer of your medical device before using to determine if these accessories are safe for you. If the accessories may be interfering with your pacemaker, defibrillator, or other medical device, do not wear the accessories.

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 0.6 x 0.38 x 8.2 inches; 3.2 ounces
  • Item model number ‏ : ‎ RZS-000-01
  • Department ‏ : ‎ unisex-adult
  • Batteries ‏ : ‎ Lithium Metal batteries required. (included)
  • Date First Available ‏ : ‎ March 11, 2013
  • Manufacturer ‏ : ‎ Fitbit Inc
  • ASIN ‏ : ‎ B00BGO0Q9O
  • Customer Reviews:
    4.1 4.1 out of 5 stars 24,349 ratings

Important information

Indications

• Make sure your band isn’t too tight. Wear the band loosely enough that it can move back and forth on your wrist. • If you use Fitbit Charge HR , Fitbit Blaze or Fitbit Surge , for better heart rate readings during exercise, we suggest wearing the band so it’s secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise.

Directions

Keep it Clean: Regularly clean your band and wrist—especially after working out or sweating. Rinse the band with water or wipe it with a small amount of rubbing alcohol. Do NOT use hand soap, body soap, dish soap, hand sanitizers, cleaning wipes or household cleaners which could get trapped beneath the band and irritate skin. Always dry the band well before putting it back on. Keep it Dry: While Fitbit devices are water resistant*, it’s not good for your skin to wear a wet band for long periods of time. If your elastomer band gets wet—like after sweating or showering—rinse and dry it thoroughly before putting it back on your wrist. Be sure your skin is dry before you put your band back on. Don’t Wear It Too Tight: Make sure your band isn’t too tight. Wear the band loosely enough that it can move back and forth on your wrist. If you use Fitbit products with Purepulse Heart Rate tracking, for better heart rate readings during exercise, we suggest wearing the band so it’s secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise. Give Your Wrist a Rest: Prolonged rubbing and pressure may irritate the skin, so give your wrist a break by removing the band for an hour after extended wear. Keep it Clean: Regularly clean your band and wrist—especially after working out or sweating. Rinse the band with water or wipe it with a small amount of rubbing alcohol. Do NOT use hand soap, body soap, dish soap, hand sanitizers, cleaning wipes or household cleaners which could get trapped beneath the band and irritate skin. Always dry the band well before putting it back on. Keep it Dry: While Fitbit devices are water resistant*, it’s not good for your skin to wear a wet band for long periods of time. If your elastomer band gets wet—like after sweating or showering—rinse and dry it thoroughly before putting it back on your wrist. Be sure your skin is dry before you put your band back on. Don’t Wear It Too Tight: Make sure your band isn’t too tight. Wear the band loosely enough that it can move back and forth on your wrist. If you use Fitbit products with Purepulse Heart Rate tracking, for better heart rate readings during exercise, we suggest wearing the band so it’s secure, but not too tight, and wearing the band higher on your wrist (about 2-3 finger widths above your wrist bone). Lower the band on your wrist and loosen it after exercise. Give Your Wrist a Rest: Prolonged rubbing and pressure may irritate the skin, so give your wrist a break by removing the band for an hour after extended wear.

Legal Disclaimer

We are a third party seller and any warranty past 30 days will need to be handled, if possible, by the manufacturer.

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Looking for specific info?

Customer reviews

4.1 out of 5 stars
4.1 out of 5
24,349 global ratings

Customers say

Customers like the activity and sleep tracker for its ability to track both. They say it provides information and motivation to stay motivated. However, some customers have reported issues with the battery life and quality. Opinions are mixed on performance, ease of use, value, and accuracy.

AI-generated from the text of customer reviews

2,819 customers mention2,206 positive613 negative

Customers like the activity and sleep tracker. They say it's good at tracking activity and the sleep metrics are addicting. They also say it shows sleep time, awake time, restlessness, and time to fall asleep. Customers also like that they can share data with friends and keep track of one another's progress.

"...Update 4/30/15 - Fitbit has an update that now allows you to track multiple Fitbit devices on your Fitbit app...." Read more

"...Both times, it charged, and appeared to track just fine, there was simply no way to get the data into the cloud...." Read more

"...Fitbits on the market and I liked the Fitbit Flex because it is a simple pedometer that I can wear on my wrist and it is a fairly reasonable price..." Read more

"...Since you always wear the Fitbit, it can track your sleep each night, including how long you're actually asleep for, how long it takes you to fall..." Read more

2,058 customers mention2,028 positive30 negative

Customers find the motivation provided by the wearable computer to be great. They say it makes them more aware of their activity, helps them stay motivated, and evaluate their own activity. They also say it's highly informative and a fantastic tool for keeping active.

"...setting software in the app relating to sleep to make it easier to focus on getting more (or less) sleep. The graphic interface is pretty nice...." Read more

"...It is keeping me utterly honest about everything. I cannot lie to myself about how many calories I'm burning. It won't let me...." Read more

"...A fantastic app with a holistic view on your life, sleep and wellness.Both devices are good devices and had no fatal flaws...." Read more

"...when you tap it. Not useful in the dark but very informative. The Charge has an LED display so you could use it as a wristwatch...." Read more

4,043 customers mention2,567 positive1,476 negative

Customers are mixed about the performance of the wearable computer. Some mention that it is working great, effective, and useful, while others say that it does not work as expected, has limited functionality, and dies unexpectedly.

"...How cool is that? It works seamlessly...." Read more

"At a glance- good value, good motivation, function is limited but great product if make good use of it...." Read more

"...It does have the option to add in food consumption, performs a variety of tasks such as calibrating it's readings with actual distance walked, and..." Read more

"...Durablity: The ZIP had no time to break or wear out. The Charge's tracker works fine but the bracelet is falling apart...." Read more

1,964 customers mention1,335 positive629 negative

Customers are mixed about the ease of use of the wearable computer. Some mention that it's very easy to use, simple, and clearer than Up's, making it easier to understand. However, others say that the set up is not entirely intuitive and the packaging does not come with any real helpful instructions upfront. They also say that you can't see how many steps exactly you have taken on the device and that the wrist harness at night is a pain to use.

"...The whole thing was simple. A red arrow on the dashboard, in the sync area alerted me to the upgrade. I really like this new feature...." Read more

"...Setting it up was a breeze.Go here: http://www.myfitnesspal.com/apps/show/fitbit and follow the instructions...." Read more

"...First, set up. It is not entirely intuitive and the packaging does not come with a lot of instruction so once you get it go right in the website..." Read more

"...Fitbit Flex: Less expensive, simple quick device for activity & sleep tracking and wireless syncing from a company that is widely known for..." Read more

1,380 customers mention530 positive850 negative

Customers are mixed about the value of the wearable computer. Some mention that it's less expensive, simple, and reasonable for the amount of features it has. However, others say that the value add was pretty minimal and the device is overpriced for what it offers. The quality is good, but the replacement cost is exorbitant.

"...However, I don't find it very useful. I want an app mainly for keeping track of my weight, body fat, and steps...." Read more

"...Fitbit Flex: Less expensive, simple quick device for activity & sleep tracking and wireless syncing from a company that is widely known for..." Read more

"...They are, however, quite expensive...." Read more

"...In summary, this is a great little motivational tool. It is a bit pricey at $99, but for me it was well worth the money." Read more

1,239 customers mention691 positive548 negative

Customers are mixed about the accuracy of the wearable computer. Some mention it's reasonably accurate when they've walked a known distance, while others say it'll only track your number of steps. They also say it doesn't provide the most extensive analysis of your activity or metabolism.

"...I can also select the volume of the cues. (Medium was perfect for me.) Then, back again to select a playlist from my iPhone's loaded tunes...." Read more

"...cannot sync to the computer because apparently, the Fitbit dongle doesn't always get detected by the computer again when it wakes up from sleep mode...." Read more

"...I mention this because I think this is what makes the fitbit worthwhile...." Read more

"...The fitbit isn't designed for runners. There are two main issues. First, run logging is poor...." Read more

1,829 customers mention368 positive1,461 negative

Customers are dissatisfied with the battery life of the wearable computer. They mention that it doesn't hold a charge for a short period of time, the charging is intermittent, and the battery isn't easily monitored. The tracker can get hard to recharge and can't charge at all.

"...Why I only gave it three stars: The short-ish battery life (I frequently forget to charge it, or forget to put it back on after it's charged), and..." Read more

"...When I recently started having this battery life problem, my battery would drain every 12-24 hours...." Read more

"...My biggest complaints are that the battery life isn't easily monitored. When my battery was low, I never received an email or notification...." Read more

"...-longer maximum battery life-inactivity alarm. Fitbit could easily issue this in an update. I love this feature on the UP..." Read more

1,798 customers mention340 positive1,458 negative

Customers are dissatisfied with the quality of the wearable computer. They mention that it does not have the high reliability and sensitivity level of a true medical device. They also say that the wristbands are not durable and break easily. Some customers also say the straps do break easily near the window area. Overall, customers find the product to be faulty and fail after a year.

"...The Polar had lots of quality problems. I wasn't crazy about the looks of the Nike...." Read more

"...The Flex has now been replaced, twice - it seems like it's designed to fail after a year. The first one lasted 15 months before refusing to sync...." Read more

"...The device continues to have these issues..." Read more

"...BASIS Band does not have the high reliability/sensitivity level of a true medical device, but when it is showing heart data, it is very..." Read more

Jawbone UP vs Fitbit Flex -- Fight!
4 Stars
Jawbone UP vs Fitbit Flex -- Fight!
Several asked my opinion of the Flex after I had compared UP to ONE last fall. I'm more pleased with Flex than expected. This review will be specifically for those comparing the Jawbone UP to the Fitbit Flex. For those interested in my review of the One and Jawbone UP it is located here: UP by Jawbone - Large Wristband - Retail Packaging - Onyx:---------------------UPDATE: I uploaded several head-to-head app screenshots.UPDATE: I've found that I am storing quite a bit of water in the Flex band pouch where the module goes. Even though they say it's shower safe, I'm pretty sure some funky stuff is going to be growing in there in a matter of time... But the band is replaceable!---------------------My journey with personal monitoring devices/pedometers started a LONG time ago: Before Fitbit even existed, with a device called the SportBrain. It was a traditional belt clip style so old that it plugged into a base that used a dial in phone modem to upload the usage data to a server. It was old. But my interest in devices that can help monitor and tell me about my activity started then, and we seem to be now in a golden age of personal data monitoring devices. Fitbit Flex, Jawbone UP, all of the Fitbit clip devices and so many more...Hardware itselfThe biggest drawbacks I found on the Jawbone UP were that it had no visual feedback about your daily achievement toward your goal and the fact that it had no visual battery indicator. It wasn't a problem for me personally, but for those who are hardcore driven on a daily basis to compare and achieve this could be a drawback for you. The next drawback about the Jawbone UP is that it does not wirelessly sync. You have to plug it into the headset jack of your phone to sync. If you are someone who wants data and feedback all day long, this would be a drawback.The Fitbit Flex does have visual feedback in the form of small white lights: They blink as you're charging, they have a special blink if you put it into sleep mode and provide 95% more feedback than Jawbone up. Jawbone UP does have status lights in it and they are used, but they could do a lot more with the lights they already have if they chose to.If you can throw a snap bracelet on, you can easily put on the UP. I did find myself fumbling a bit with the clip mechanism of the Flex like I do when I have to button my own shirt cuffs. After it was clipped though, it feels secure and I am not one to put on and remove devices like this. I want to set it and forget it.Fit & FeelThe Fitbit Flex feels very comfortable on the wrist. The pictures don't do it justice. For me personally this is the one defining factor that really makes the Flex shine for me compared to the Jawbone UP. It feels super light weight, doesn't grab, and doesn't look nearly as big/thick as the pictures make it look.The UP uses tension to stay on, while the Flex uses a clasp. The UP may have a better sense of solid attachment that wouldn't come off no matter how hard you fling your arm, but the inverse of that is the Flex: It doesn't have to monkey-grip your arm to be there and stay. You can have it fit a bit more loosely than UP and be comfortable.When typing on at a keyboard, I prefer the feel of the Flex. The rubber is flat and thin so it adds very little against the edge of a keyboard. The UP doesn't have the big square bump on the top, but it does have a bracelet shape/size all the way around, so it can prove a bit more of an annoyance up against a keyboard.The Flex does have replaceable bracelets and colors, which means the device is more convertible and flexible going forward. That being said, it is less visually appealing to me compared to the UP. The UP can be a part of jewelry and most people would never notice. The Flex does have a strange-ish future nerd look to it. I don't mind that, but some may.I wear both in the shower with no issues. I've done a lot of swimming pool roughhousing with the UP with no issues, but haven't tried with the FLEX. A commenter tells me that it is swimming approved, though the data provided might not be that useful.Battery Life & ChargingBoth the Flex and the UP charge in very similar almost identical USB adapters. They're meant to be charged on a computer and in my experience shouldn't be charged off of a phone USB wall charger. They both charged in similar amounts of time, and the Flex did last about 4 days on a charge. The UP can last as much as 10 days on a new battery, but I found that it has declined some since November. On this case, I say that both do about what they suggest. The UP fits snugly in the charger, while the Flex doesn't feel nearly as secure in its charger but I haven't had any issues with it falling out.Syncing:The Jawbone UP sync's via the headphone jack of the phone. It doesn't do Bluetooth, can't be plugged into a PC, so you're pretty much set on a smart phone or table to sync it. It's simple, doesn't consume battery to sync wirelessly, and works reliably. You have to watch because not all phones are supported.The Flex syncs wirelessly with Bluetooth 4.0 via the smartphone or via an adapter to a computer. For those without a smart phone or a locked down phone that work doesn't allow you to install apps, this could be a deal maker for you. It's not a constant sync but initiates as soon as you open the app on the smartphone. I haven't noticed any significant battery life loss. Not all phones are supported with Bluetooth 4.0-- most phones on the market don't yet have Bluetooth 4.0. You'll want to check Fitbit's website to see if your phone is supported. On the upside, the Flex does come with a Bluetooth adapter you can plug into a PC or Mac to sync wirelessly via the computer. It really adds extra work and decreases the usefulness of wireless sync, but it's do-able.Software:The software, to me, is the major differentiating factor between the two devices. The hardware looks entirely different, and there are some small differences in what the hardware can do, but the delivery through the app is what makes them clearly meant for different targets.The Jawbone UP software is beautiful. After you've sync'd enough it starts giving you feedback and encouragement through statistics. It will tell you "you were in the top 15% of UPpers this week" or "getting 8 hours of sleep per night it shown to improve...." if your sleep is coming up short. It does have the option to add in food consumption, performs a variety of tasks such as calibrating it's readings with actual distance walked, and has a really interesting "lifeline" feature that trends your activity & sleep over a period of hours, days, weeks and you can create a report on the fly comparing, for example, sleeping and calorie intake, to see if you consume more calories on days that you didn't have adequate sleep. It shows trends on daily/weekly and true to the marketing is a more "holistic" view of you and your life/activity. I guess we have reached my thesis for the comparison: Jawbone UP is about the holistic view of your life, while the Fitbit Flex is more finely focused on activity, seeing feedback for that activity in a quick frequent way and focusing on providing you that core data quickly and simply.The Fitbit software is the same software in use for all current Fibit devices. As soon as you launch it, a sync begins and your latest data will be presented. While the UP presents more current data on the "HOME" page, Fitbit has other tabs where you can explore the data they present. UPDATE: I discovered that the Fitbit software does do single activity trending if you turn the phone sideways: Hours/days/weeks, etc. It doesn't compare it to another statistic, but better than nothing.Both devices sync your data to a website. The Flex presents a more insightful view of your data on the website, while UP presents an equal amount of that data on the mobile app. Both support third party apps if you are really intense about a specific subject ( like food/calories with extensive catalogues, MyFitnessPal, etc.)A few features that the Flex has that the UP does not:-Lighted feedback on the band-more flexible fit, colors that can be changed after purchase-Thinner band around places you may bump against desks, etc.-wireless syncing (Jawbone needs to get on this train)-quick access in the app to 'water consumed'Fitbit Flex: Less expensive, simple quick device for activity & sleep tracking and wireless syncing from a company that is widely known for pedometers.A few features that UP has that Flex does not:-insight engine to look at your data and provide you feedback-longer maximum battery life-inactivity alarm. Fitbit could easily issue this in an update. I love this feature on the UP-bar code scanner in the food app to scan premade food for nutrition contents-power nap which will auto wake you between 25-45 minutes by modeling after your normal short sleep cycleJawbone UP: Technology that could pass for fashion. A fantastic app with a holistic view on your life, sleep and wellness.Both devices are good devices and had no fatal flaws. Both devices offer communities and ability to add friends to provide encouragement and interaction. If I had to give an elevator speech about the difference between the two:1. A few tech differences: Flex has wireless sync and quick feedback throughout the day. Flex is thick on top, and thin around. UP is more consistent without a clasp.2. UP has a very useful insight engine and is more of a "holistic" view. Less rewarding for someone who wants instant feedback. It's all about your time horizon: If you want to look at days and weeks of data, receive valuable feedback about your activity and sleep patterns and wellness the UP will probably please you most. If you are someone who wants hourly motivation and ability to sync frequently then the Flex is probably the right device for you.I hope this comparison has been helpful. If you have any specific questions I will be happy to answer or investigate & answer. My personal lean is toward the UP simply because I am using it to observe my sleep and activity from a bigger picture view. Sometimes I may go a day or few before I sync. If I were in a mode for physical fitness or weight loss, I may probably prefer the Flex. It all depends on your objective. There really isn't a fight between these devices-- they're both good and are focused towards different crowds.UPDATE: I found an interesting quirk with Flex: I was shopping at a store today and the shopping cart had a wheel that was a little bumpy. During my shopping I felt a vibration from Flex and thought maybe I had made a part of my daily goal. Then: BZZ, BZZ, BZZ! Turns out that the bumping of the cart in a rhythmic way confused the Flex into thinking I tapped it. It kept going in and out of sleep mode. Whoops. I can't wait until I see today's data....
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Reviewed in the United States on January 11, 2014
Color: BlackSize: Large (Pack of 1)Verified Purchase
Update 12/8/15 - Fitbit just added a new firmware update for the sleep timer feature. Once updated it's no longer necessary to tap the Fitbit before going to sleep or when waking it. It will now recognize when you're inactive and have gone to sleep. It also has some new goal setting software in the app relating to sleep to make it easier to focus on getting more (or less) sleep. The graphic interface is pretty nice. I'm looking forward to using this since I've become something of a night owl and could really stand to get on a better schedule. One more thing to like about my Fitbit.
The update took about 5 minutes using my iPad and plugging my Fitbit into its charger while it updated. The whole thing was simple. A red arrow on the dashboard, in the sync area alerted me to the upgrade. I really like this new feature.

I bought 3 of these fitbit flex devices, one for myself, my husband and my sister. Before purchasing I researched several wristband devices such as the Jawbone UP, the Nike Fuel and and the Polar Loop. I also looked at the fitbit force which is a newer version of this band. The lack of water resistance on the force was a deal breaker for me. I wanted to be able to wear this band 24/7 and to be able to wear it in the shower or when swimming. That was part of what made it attractive to me. Also, after reading reviews about the clasp problems on the force and how many people lost them, I wanted no part of that. They are also quite a bit bigger and look clunckier. The wristband on the UP looked like it would catch on everything and had no display at all. The Polar had lots of quality problems. I wasn't crazy about the looks of the Nike. The display is nice and I can see how people would like them, but not my style. The fitbit flex, to my tastes, had the coolest look. I also know a couple of people who own the fitbit flex and they were very enthusiastic about them so that influenced me as well.

So here is what I like about the flex: I like the way it looks on my wrist. All of us got the slate color. You can also order bands in a few different colors, both here and on the Fitbit site. It is lightweight and even though I don't often wear a watch I don't notice this on my wrist at all. The clasp was VERY difficult to secure the first couple of times until the rubber softened up a bit and until I got the hang of it. I secured it off of my wrist a couple times when it was new. Making sure the band and clasps are lined up correctly and then placing one finger directly below the clasp and my thumb directly above and squeezing hard was the way to do it.

I like that it's water resistant and that I can wear it swimming or in the shower. It is safe down to 10 meters or around 30 feet. I like that the wristband is made of TPU rubber, which according to Wikipedia is a type of rubber used in automotive instrument panels, caster wheels, power tools, sporting goods, medical devices, drive belts, footwear, inflatable rafts, and a variety of extruded film, sheet and profile applications. I think it should hold up for a very long time. I like that the display on the band gives me a rough idea by tapping on it of my progress throughout the day. I can also check my progress on my iPhone 4S and see number of steps so far, calories burned, how many hours of sleep I got last night and how often I woke up or was restless. So far it seems very accurate. I can also track the foods I've eaten and the calories, my weight goals and weight lost, check on the weekly number of steps friend's with Fitbits have taken and compare them with my own.

I like that I can wear it 24/7 and only have to take it off to charge it once every 7 days. It takes about 3 hours to charge with a USB thingie that comes with it. I use a wall adapter to charge it but could also use a USB port on my desktop or laptop computer. I've lost too many pedometers in the past by dropping them out of my pockets or forgetting about them and sending them through the washing machine, so the wristband seems like a much better option for me. I also like that I can connect wirelessly with my smartphone and with the little dongle included that goes into my desktop or laptop, can connect with those wirelessly as well. Software downloads for all of these are free. I'm also able to connect on my first gen Kindle HD 8.9 although I can't see where it's shown as a supported device so far. But it works with the Android fitbit software in the app store.

The step measurements seem reasonably accurate. Waving my hand slowly won't register as a step. Waving wildly will. Driving in the car won't register but reaching around quickly in the car sometimes will. Typing on the computer or Kindle won't register. I've heard that swimming doesn't register either but you can input the time and activity on your phone or tablet. When I first got the flex I started the iPhone app and watched my steps register on my screen as I walked around the house. That, and watching my steps on the treadmill have shown it to be pretty accurate for me, although not perfect. I think that all pedometers have some inaccuracies. What I'm looking for is a comparative trend where I can tell how much exercise I'm getting. The accuracy is good enough for me.

So I wake up in the morning, tap the wristband quickly a few times to tell it I'm awake. Then if I tap it twice I see one tiny blinking light, telling me I'm working on my first 2,000 steps. Later, when I've hit that mark and tap to check again, I'll see one solid light and the second one blinking. There are 5 lights total and each represents 2,000 steps (or 20% of my goal. I could set it up differently on my computer, using a different number of steps as my daily goal if I wanted to.) So I can see my approximate progress any time during the day. When I hit my goal of 10,000 steps the band vibrates and all the lights flash. That means you done good!

I can set up to 8 silent vibrating alarms on this fltbit. I have one to wake me up on weekdays (you can specify which days) and one at 8:00 each night to remind me stop eating for the day. The vibration gets my attention and is effective at waking me up. I set the alarms on my computer or phone.

At night when I'm in bed and ready to go to sleep I tap the wristband rapidly a few times, it vibrates briefly, and goes into the sleep mode until I wake it again in the morning.

So am I happy that I purchased the Fitbits for myself and my family members? Yes I am. It motivates me to walk or run more. I can connect to other friends and family with Fitbits to see everyone's weekly step progress but what really motivates me is just competing against myself. I'll find myself parking in the back of the parking lots at stores to log those extra steps or walking around the store longer because it's a good way to add even more. When I haven't reached my goal at night, I'll sometimes walk around the house several times just to hit a number. Now that can't be all bad, can it?

Update 1/12/14 - I'll keep updating this review with comments and observations as I use this device. I noticed that walking at a rapid pace is counted as "active minutes". Someone on a message board suggested adding a touch of lotion to the clasp if you're having trouble getting it to clasp when it's new.

Update 1/16/14 - A full charge is lasting just a bit over 7 days. It takes about 3 hours to recharge it fully.

Update 1/21/14 - Some people have complained about this band coming undone and losing it. I haven't had any problems with it at all, even when pulling tight coat and shirt sleeves over it, brushing my arm against things or the dog pulling on it once or twice. (I'm sure the dog could have pulled it off if I didn't stop him.) The other day I had the dog's leash wrapped around the wrist with the Fitbit and even with the dog pulling against the leash the fitbit stayed on. We walked this way a couple of miles before I noticed it and unwrapped the leash from my wrist. But even with all that agitation my fitbit stayed put. It has stayed on through enough that I'm not very concerned about losing it. I've only taken it off to charge it. I have the band snug enough that I can only put one finger beneath the band but I can move it a couple of inches back and forth on my wrist.

Update 7/3/14 - A new update that works with iPhones that use the Fitbit app was released a few days ago. I've used it with my iPhone 4S and really like the new upgrade. It adds a whole new dimension to my Fitbit app. With the upgrade, I just click on the exercise icon on the dashboard which takes me to a new screen showing the days of the week that I've exercised. (Meaning a walk, run or hike, something in addition to the regular walking in my daily activities.) This screen shows exercise frequency by day of the week, it puts a check on the days that you do some planned exercise. If I click the little stopwatch in the upper right-hand corner, it takes me to a screen where I can click Walk, Run, or Hike. I go back and can then click Cues which takes me to another screen where I can select whether or not I want to hear spoken cues. I can also tell it which cues I want including: Distance, Time, Average Pace, Split Pace, and Calories Burned. Then I go back again an can select the frequency of the cues from every .5 miles to every 5 miles. Or, I can make the cues time based ranging from every 2 minutes, 3, 4, 5, 10, 15, 20, 25, or 30 minutes. I can also select the volume of the cues. (Medium was perfect for me.) Then, back again to select a playlist from my iPhone's loaded tunes. Last, I allowed location services for Fitbit in my phone settings and I was ready to go. Now I see a big red circle with a Start arrow on the screen over a GPS map showing my location. I pop in my earphones, click Start and my music starts playing.

As I walk, I can see a screen showing how far I've walked, rate per mile, time elapsed. Every half mile a voice interrupts my music telling me how far I've gone and all the other things I've specified in Cues that I wanted to know. Then it goes back to playing my music until it's time for my next designated Cue. How cool is that? It works seamlessly. At the end of my walk I tell it I'm finished (or I could also pause it if I stop to talk to a neighbor or something). When I'm finished (or even during the walk or run) I can see a little red line showing my route on the map. The steps from my walk are added to my steps count, just as they always are. I love these new features. They add a lot to the Fitbit experience.

For those of you who track calories and foods eaten in the Fitbit app, the update now includes a bar code scanner. So far, the things I've scanned have been in their database. If you don't see the bar code symbol in the upper right-hand corner of the Log Food screen, log out of the Fitbit app and then log back in and it should be there.

Update 11/28/14 - If something happened to ithis Fitbit today, what would I replace it with? Another one just like it. If one of the new Fitbit models was interchangeable with it on a daily basis I might get one of those too, just because I like new technology. But this one would be my main fitness band. I would like having a watch built in, but then it would look kind of silly wearing a conventional watch on the other arm. And I have a lot of nice watches.

Update 12/12/14 - I just noticed today that the Fitbit Flex is the #1 Best Seller on Amazon this holiday season. It does seem like when I see people wearing fitness bracelets, this is the one they're most often wearing. A lot of the competitors have lowered prices significantly on their devices which is probably the best indicator of all. It's nice to know that I'm not the only Fitbit fan after wearing it for nearly a year. :)

Update 12/26/14 - My Fitbit looks all new for the holidays. This replacement bracelet took over 20 days to arrive but for about $2 it was worth the wait.
1pc Small S Black with White Dots Spots Replacement Band With Clasp for Fitbit FLEX Only /No tracker/ Wireless Activity Bracelet Sport Wristband Fit Bit Flex Bracelet Sport Arm Band Armband  A couple people have asked me how the bands hold up over time. I have to tell them that I don't know since I'm wearing different colored ones almost every day. They don't have much of a chance to show wear.
After almost a year of wearing these 24/7, none of us have had one come off accidentally. Even the cheap knock-off bands seem sturdy and reliable like the original. And I'm not a very careful person about pulling tight sleeves over it or draping grocery bag handles over my arm.
I have the steps across our back patio counted out by counting them myself. It is 60 steps back and forth once. (Yeah, I know, way too anal.) Oftentimes when I haven't hit my 10,000 steps for the day, I'll go out and walk back and forth with my iPad on the patio table to check my progress. I know from doing this that the Fitbit step count is dead-on accurate for counting steps when walking. Dancing will add steps which I think is fair since it's at least as good as walking for exercise.

Update 1/30/15 - I can't believe I've had my Fitbit Flex for over a year already. I'm still wearing it 24/7 as a great motivator to keep moving. I've had several people email me with questions about the way it counts steps so I thought I'd share this with you. I tested another fitness band recently, wearing it on the same arm as the Fitbit. The other band recorded a lot more steps than the Fitbit. I've "manually" counted steps while walking around different areas around my house and compared them to the Fitbit and found them to be exactly the same. But I never did it for more than about 100 steps. Now I was curious because the readings on the two bands were so different. So I went for a walk and counted out 1,000 steps as I took them, counting in my head. (Mumbling under my breath, actually.) Before I started, I noted the starting number of steps on my iPhone for both bands using the apps for each. At the end, I checked the number of steps for both bands. The Fitbit recorded 1004 steps. The other band recorded 1,217. Only 4 extra steps on the Fitbit is pretty impressive and is close enough for me. I'm contacting the manufacturer of the other band to see why it's so far off.

Several people didn't realize that you can adjust the stride for the Fitbit. Just log into the dashboard in your Fitbit app, click on the little gear thingy in the upper right hand corner and select "Settings". There's a field there for Stride Length and Running Stride Length. You can manually enter your personal stride length. If you leave these blank, the app will estimate the values based on your height and whether you are a man or woman. Click the "Update Profile" button to save your changes. Remember to sync to update your tracker with the new stride measurements. I didn't even realize I could do this until several months after I had my Fitbit. I guess it must have estimated correctly in my case because when I put it in manually I didn't notice a difference.

Update 4/30/15 - Fitbit has an update that now allows you to track multiple Fitbit devices on your Fitbit app. I haven't tried this, but from what I understand this will allow you to go back and forth between other models and once registered it will recognize them automatically. It's tempting to try the Fitbit Charge or the Surge that can measure heart rate or pulse or have caller ID. They're bulkier than I would like to wear on an all-the-time basis, but would be nice for workouts. And new technology is always fun. The Flex is still my first love and I like the switchable bands, but I'll look at the new models now that it isn't an either/or decision. Here are their instructions for adding another Fitbit:

Update your Fitbit app (if you haven’t already)
‘Set Up a New Fitbit Device’ from the Account tab in the Fitbit mobile app or Fitbit Connect
Finish the setup instructions, and start swapping – we’ll take care of the rest!

Update 5/7/15 - Has everyone seen the new Fitbit commercial? I usually fast forward through TV commercials on the DVR, but this one I recorded and kept until I could find it on youtube: https://www.youtube.com/watch?v=K0qVi_nF6y8 This makes me smile every time I watch it.

Update 1/24/16 - When I purchased my Flex a little over 2 years ago it was advertised as being "Water resistant to 10 meters or 33 feet" which is 1 ATM. Their website now states: "Flex has been tested up to 1 ATM meaning it is sweat, rain and splash proof. However, the device is not swim proof. We also recommend taking Flex off before showering because, as with any wearable device, it’s best for your skin if the band stays dry and clean." The definition of 1 ATM, as I understand it is that it indicates that under static (nonmoving) conditions at 10 meters below the surface of the water the pressure of the water will not breach the seals on the device. But I can't take it into the shower? Perhaps even more confusing is the Fitbit Surge is rated at 5 ATM (50 meters) and has the same warning about not being swim proof and not to be worn in the shower. Are they just trying to ensure that users don't abuse the tracker?
That said, I always shower with mine, I never dry it off afterward except the top when I'm drying my arms. I don't swim often but when I do, I leave it on. If I were going to spend a lot of time swimming on a regular basis I might take it off since it doesn't track swimming anyway. But for splashing around in a pool occasionally, I don't worry about it.
My skin is somewhat sensitive to watch bands and I'm allergic to some metals and other materials. I couldn't be much LESS careful about the Fitbit and have never had a problem with the band and my skin. The underside is often damp from getting wet in the shower even half an hour later and it hasn't bothered my wrist. Being able to wear this 24/7 was a major selling point for me and it has worked just fine since January 2014.
4,644 people found this helpful
Report
Reviewed in the United States on May 25, 2013
Color: SlateSize: Large (Pack of 1)Verified Purchase
SUMMARY: This device will not do anything for you, but it will help you make good decisions about what you need to do yourself. Fitness is hard work. If I had to sum up what this device is doing for me, it is this. It is keeping me utterly honest about everything. I cannot lie to myself about how many calories I'm burning. It won't let me. Just knowing there is a record motivates me to make sure it is a good one. It's the same effect one gets if they know they are being graded. 

******
THE LONG VERSION

I have been using the fitbit flex for five days now and I have fewer pounds and great fitting pants already, so it would be hard to regret my purchase.

I went ahead and set my fitbit up to integrate with MyFitnessPal as soon as I set it up, so I have no idea how it works without it. Setting it up was a breeze.
Go here: http://www.myfitnesspal.com/apps/show/fitbit and follow the instructions.

Once it is set up it gives you a warning that you should only enter your food on MFP to avoid double entries. I have entered everything I eat on MFP, and the info magically finds it's way to my fitbit dashboard, and there have been no problems whatsoever.

Entering exercise is a little more complicated. Once you've done the integration, your MFP exercise entries will require one extra step--the start time of your exercise. My entries consist mostly of running and swimming. Technically, I don't need to enter the runs, since the pedometer takes care of them just fine, but when I do enter a run, the two apps manage it well. MFP gives the start time and duration of the run to fitbit, and fitbit takes that info and does some calculations that take the pedometer data into account, and comes up with a number of calories burned. I have run into one snag...if I edit the start time of my entry in MFP after I've already logged it, it causes the exercise to log twice on fitbit and I have to go into fitbit and manually remove the double entry. Sometimes I'm lazy and I don't enter the runs in MFP and I just let fitbit use the pedometer data exclusively....I've not taken a close enough look at the difference to comment on it, but it seems to work well either way as far as calorie counting. I just prefer knowing the speed and duration of specific intervals and that data is lost if I don't enter it into MFP.

I take the flex off when I swim laps, since I have a watch that counts my laps and distances for me and wearing both would be cumbersome. I enter my swims manually into MFP, and fitbit automatically calculates it all. I've had no problems.

You'll have a new thing in your MFP display too. Your exercise log will have a "fitbit calorie adjustment" entry.

For whatever reason, fitbit lets me eat just a little less than fitness pal does, so the math is obviously a little different on the two programs.

If you are tall and have abnormally long legs like me, you may have to adjust fitbit's default stride settings. Their website can tell you how.

The biggest lifestyle change for me has been brought about by the in-your-face awareness of just how sedentary sitting at a computer is. On days when I work at my desk, 6PM rolls around and I've only got maybe 500 steps logged. I'll hit the gym to do my 3 mile jog, and still be no where near the 10 thousand step goal that is the default setting for the fitbit, so I end up walking on the treadmill until I get there. I find myself going on long walks after my swim too. Maybe I'm crazy, but I can't stand to go to bed without meeting my step goals first, even if I've logged a long swim, but whatever the reasons, it is working, and fast. I am losing weight again after stalling out for quite a while.

I mentioned only having 500 steps after a day at my desk. Yesterday I had my first day away from my desk...shopping, a little yardwork, housework, just getting all the little things that need done around the house...at 5pm I had logged 8000 steps and was almost to my goal. I mention this because I think this is what makes the fitbit worthwhile. It quantifies how sedentary your life is on a given day and then tells you exactly what you need to do to make up for it.

And I know, if you are a desk worker like me, that 10,000 steps is going to seem a bit ridiculous after a day at the office, but trust me, if you can make yourself make up for it, you will be blown away by the results.

I hesitate to put the numbers down for my weight loss over the last 5 days, because I have frankly lost weight faster than I should and I don't want to invite trolls or create unrealistic expectations...everyone is different. I am eating more than 2000 calories a day (within the recommendations of the app set at medium plan intensity), I'm not starving myself, and yes, my legs were pretty tired the first few days, but I promise, I feel great. I'll be at my goal of 145 in a couple of weeks at this rate. The fitbit didn't lose that weight for me...I worked my butt off all by myself, but fitbit helped me figure out what I needed to be doing.

****

I know this review is getting long, but I wanted to mention a couple of other things.

I LOVE the sleep monitoring. I have random bouts of insomnia, and I sometimes wake up repeatedly all night, and this thing has done a brilliant job of measuring how much time I've actually spent sleeping vs. how much time I've been in bed. And that number of hours of actual sleep correlates almost perfectly to how I feel, mentally, through the day. The default sensitivity is perfect for me...though I have seen it isn't so much for other people. It is easy to turn it on for naps too. Just tap it five times when you lay down, and again when you get up. You can fix it manually in the website if you forget...it will still have the movement data regardless of whether you tap it or not, it just needs to know when you were sleeping to fix it all.

It accidentally goes into sleep mode here and there...once when I was using a hammer drill, once when I was using a hammer, and once when I was shaking a bottle of cat antibiotics to mix it, but when that happens, you know because it vibrates, and if you tap it five times right away to bring it out of sleep mode, it won't mess up your data.
6 people found this helpful
Report

Top reviews from other countries

Translate all reviews to English
JM
3.0 out of 5 stars nah
Reviewed in Canada on March 26, 2021
Color: BlackSize: Large (Pack of 1)Verified Purchase
not worth it bro
Laura Gómez Betancourt
5.0 out of 5 stars Fitbit
Reviewed in Mexico on March 24, 2019
Color: BlackSize: Large (Pack of 1)Verified Purchase
Muy buena para ser tan sencilla
Kristyn
5.0 out of 5 stars Fantastic Product, Fantastic Customer Service... Absolutely Recommend!
Reviewed in Canada on January 10, 2015
I've been using my Fitbit (and the website program) for over two weeks now. It's not a ton of time, but I have to say that I am absolutely in love!

While I had a bit of difficulty figuring out the ins and outs of the product (there's no user-manual in the package; you have to go to the website and click through the product to learn about how to go to Sleep Mode, how to charge, how to install, etc), once I did figure it all out it's been a breeze and surprisingly motivating. Just the fact that it's on my wrist reminds me (and encourages me) to get moving; I find I WANT to hit my 10,000 step goal, I'm DRIVEN to get there no matter how tired I might be, not to mention that the website is fantastic for tracking your calorie-intake and -outtake to really get a concrete understanding of your success in your weight-loss regiment. I love that the website charts my daily stats, from steps and distance to weight and progress towards my goal, and I have been religiously tracking myself, feeling great pride when I'm told I've reached my goal :D

The Fitbit Flex also has a sleep mode. Before I bought it, a friend of mine told me it would wake me up before my next REM state so that I wouldn't wake up groggy. Fibit does not say this simply because it's not true; it was a misrepresentation by my friend. BUT! The Fitbit does track how long it takes to fall asleep and how many times you 'wake up' (or move about) during the night, and it gives you a 'sleep efficiency' percentage that is actually really helpful. I've been enjoying this feature more than I expected because it's showing me that my sleep efficiency is TERRIBLE!!! 55% on a good day! AH! But it makes sense to me because I'm always tired and usually need to be in bed for 10+ hours to feel rested... no wonder, considering an 8-hour sleep only gets me around 4 hours of ACTUAL sleep! So, now that I know this (thanks Fitbit! ^.^), I've been taking steps to try to get better sleep: no computer before bed, watching what I eat (no chocolate or caffeinated tea), etc. It's still early, but I'll continue to use Fitbit to see if it's working and compare to my past nights' sleeps :)

A final thing I want to talk about it the Customer Service at Fitbit. In a word, it's WONDERFUL! For my experience, I bought the tangerine coloured Fitbit (I LOVE colour!) and simply adored the brightness of it! Until a week in when the orange started to turn black.... It's not a fault of the Fitbit, I know it was/is something of mine that the Fitbit is rubbing against when I wear it that is rubbing off onto the Fitbit and staining it (though for the life of me I can't figure out what! My coat? Sweater? Sweat pants? Jeans? Furniture???? What is it!!?!?). The pretty orange wristband is now completely black on the edges... it's OK for casual wear, but if I want to wear something nice and keep my Fitbit on, it just looks shabby, and it made me really sad :( So, I contacted Fitbit Customer Service. I sent an email with a picture showing the discolouration and explaining that my tracker was in perfect shape but that the discolouration of the orange wristband made me not even want to wear it anymore because it just looks aweful. Within two days, I received a message from Fitbit Customer Service saying they would be happy to replace my orange wristband with a black one instead (no discolouring! YAY!!!!). I have to say, I am THRILLED with their response! Not only with the speed and efficiency of it, but with the fact that they were so understanding, friendly, and respectful of me. The only questions they asked were my name and address so they could send the replacement, no suspicion or berating questions, and as a customer I super appreciate that :) There seem to be less and less companies with great Customer Service, but Fitbit is definitely one that has fantastic Customer Service :) I feel confident and comfortable buying from them and recommending the products now that I know that they truly put their customers first.

Anyway, that's my experience with Fitbit. I absolutely recommend this product, specifically this company rather than another version of the same product (I know there are lots out there... Fitbit just outshines them imo). Hope this review is helpful! :)
74 people found this helpful
Report
Rohit Singhal
5.0 out of 5 stars The battery life is also good and once fully charged as advertised works for 4-5 ...
Reviewed in India on March 22, 2016
Color: BlackSize: Large (Pack of 1)Verified Purchase
I ordered fitbit band in January 2016 and since then it has become an integral part of my daily routine. The band along with the mobile app are a one stop destination for me to track my water intake, my sleeping patterns, activities and calories burnt. The battery life is also good and once fully charged as advertised works for 4-5 days. It is also water-proof and therefore is on my wrist 24*7.

Looking forward to upgrade to a higher model of fitbit.
2 people found this helpful
Report
もずく
4.0 out of 5 stars 一日一万歩、継続中!
Reviewed in Japan on January 23, 2015
Color: SlateSize: Large (Pack of 1)Verified Purchase
どうしてもこの色が欲しかったのでこちらの並行輸入品にしました。
睡眠と歩数カウントに使ってます。
食事ログは使い勝手が悪いので別アプリを使ってますということでマイナス1。

目標歩数を達成しないのが悔しいのでテレビを見ながら足踏みをして
達成させてます。目標のおかげで購入前に比べて格段に体を動かしてます。
バッジが出るのが意外とモチベーションにつながって◎
4 people found this helpful
Report

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.