Never stop moving
The Fitbit Flex activity tracker encourages you to make fitness a lifestyle. Start wearing this slim, stylish device all the time and it will work with the app on your iPhone, iPod touch, iPad, or Fitbit.com on your Mac to get you motivated. It tracks steps, distance, and calories burned, then wirelessly syncs the stats to your iOS device or Mac so you can see how you're stacking up against your daily goals.
Improve your sleep
At night, Fitbit Flex tracks your sleep cycle, gathering information that helps you learn how to sleep better. And in the morning, it wakes you silently—no irritating noise to disturb others.
- Tracks steps, distance, calories burned, and active minutes
- Monitors how long and how well you sleep
- Wakes you (not your partner) with a silent wake alarm
- LED lights show how your day is stacking up against your goal
- Easy-to-wear, slim, comfortable wristband
- Wirelessly syncs to your Mac, iPhone 5, iPhone 4S, iPad (3rd or 4th Gen.) and iPod touch (5th Gen.)
- Set goals, view progress, and earn badges
- Share and compete with friends throughout the day
- Free Fitbit iPhone app
- Waterproof so you can wear it in the shower
Did you notice?Syncs stats wirelessly to your iOS device or Mac for timely analysis.
Apple Recommends ForImprove your fitness by tracking daily activity and then checking it against your goals on an iPhone, iPad, iPod touch, or Mac
What's in the Box?
- Fitbit Flex tracker
- Large and small wristbands
- Wireless sync dongle
- Charging cable
- Free Fitbit.com membership—includes ability to log and track activity, food, sleep, water, body mass, weight, and more
- Access to free mobile app for iPhone
- Height: 0.375 in./0.95 cm
- Width: 0.6 in./1.52 cm
- Weight: 0.4 oz./11.34 g
- Length: 8.2 in./20.83 cm
- Mfr. Part Number: FB401PK
- UPC or EAN No.: 810351020219
- Note: Products sold through this website that do not bear the Apple Brand name are serviced and supported exclusively by their manufacturers in accordance with terms and conditions packaged with the products. Apple's Limited Warranty does not apply to products that are not Apple-branded, even if packaged or sold with Apple products. Please contact the manufacturer directly for technical support and customer service.
- Warranty: One year
Live a healthier, more active life with Fitbit, the top app for tracking all-day activity, workouts and health. NOW track runs stats, hikes and routes with MobileRun and stay on top of your calorie goals with faster, smarter food logging.
Use this app on its own to track basic activity and runs, or connect with Fitbit’s line of activity trackers and the Aria Smart Scale to get a complete picture of your daily stats—including steps, distance, calories burned, sleep, weight, and more.
GET ACTIVE. TRAIN SMARTER. EAT BETTER. STAY MOTIVATED.
TRACK ALL-DAY ACTIVITY: Track your daily steps and distance right on your smartphone with MobileTrack for iPhone 5. The M7 coprocessor accurately tracks your basic activity when you carry your phone. For more in-depth, all day tracking of stats like calories burned, active minutes, and sleep, pair the app with a Fitbit tracker.
ELEVATE YOUR TRAINING: Track stats and routes for runs, hikes, and walks with MobileRun. See your pace, splits, time, distance and route maps in real time. Record workouts and use the monthly exercise calendar to follow your training program.
LOG FOOD: Easily log calories with a credible database of more than 350,000 detailed food entries. Or, use our bar code scanner, quick calorie estimator for customized entries.
ACHIEVE YOUR GOALS: Set goals, enter your weight, record your sleep and start a food plan. Then view your progress and track your trends with easy-to-read charts and graphs.
COMPETE WITH FRIENDS: Enlist friends and family to help you reach your goals by sharing stats, joining fitness challenges, direct-messaging each other, and competing on leaderboards.
SYNC WIRELESSLY: Fitbit trackers continuously sync your stats with your iPhone 4S and later to give you real-time access to your progress without plugging in.
OUTSMART YOUR WEIGHT: Connect wirelessly to the Aria Wi-Fi Smart Scale to seamlessly track your weight, activity and more.
Learn more about Fitbit products and services at www.fitbit.com. …
Ratings & Reviews
Variety of Functions
I've had the fitbit flex for just short of a week and I'm quite pleased so far. It has a wide range of options, and I like that I I've had the fitbit flex for just short of a week and I'm quite pleased so far. It has a wide range of options, and I like that I can track my food intake and it adjusts may daily available calorie limits based on my goals and the amount of exercise/activity I put in. Every day is different, so it doesn't make sense to have static restrictions - I like the changeability of it's logging process.
My only complaint is there is no indicator of low battery - My phone app said it had half battery left, but I just realized it died sometime within the last few hours, seemingly out of no where. There should definitely be better alerts for battery life, especially when synced to an iPhone. A little disappointed in this because now I'll have lost a day of data.
All in all, I give it a 4/5. There is room for improvement, but overall it is a nice peace of technology with easy to use software and lots of options depending on what you want to track. …
- Written by Deanna C from Langley
53 of 57 people found this useful
Broke in the fit few hours!
This device was working really well for the first few hours, and the app was very nice to use with lots of really cool features. B This device was working really well for the first few hours, and the app was very nice to use with lots of really cool features. But within a couple of hours the device stopped working. I took it back to the Apple Store and exchanged it for another Flex which wouldn't work while I was in the store. I wanted to make sure it work before I left the store, but it wouldn't work either. I'ld wait to buy the upcoming "iWatch" from Apple. …
- Written by Mark D from Ramona
71 of 98 people found this useful
Works Great as a Pedometer
I find the Flex works great as a pedometer, but is very difficult to use as a sleep tracker, used the Fitbit One in the past and i I find the Flex works great as a pedometer, but is very difficult to use as a sleep tracker, used the Fitbit One in the past and it was very good as a sleep tracker. …
- Written by Michael M from Melbourne
44 of 47 people found this useful
The sleep tracker is incredibly helpful and the app is fun to use. I was pleasantly surprised at the customization features of fo The sleep tracker is incredibly helpful and the app is fun to use. I was pleasantly surprised at the customization features of food and drink entries on the app. My goal is to lose 10 pounds and the FitBit is proving to be a valuable asset to that goal. …
- Written by Nick R from Hughesville
7 of 8 people found this useful
Love my Fitbit !!
I thinks it is a great motivator for me. Im determined to meet my goal of 10,000 steps a day. It has been pretty accurate with my I thinks it is a great motivator for me. Im determined to meet my goal of 10,000 steps a day. It has been pretty accurate with my sleep patterns. i love it so far. My daughter has one also and she loves it ... Battery lasts at least 5 days but has made it 6 days. …
- Written by Kristina C from Jac
7 of 8 people found this useful
Waste of money
Loved my fitbit flex and it kept me on the move as I enjoyed getting the stats from the website. After 2 months the transponder ju Loved my fitbit flex and it kept me on the move as I enjoyed getting the stats from the website. After 2 months the transponder just died. So I have two nearly new pink bands but no wireless device. Too expensive at that rate. …
- Written by Dympna R from BRISBANE
7 of 10 people found this useful
Questions & Answers
Answers from the community
Will it be compatible with iPad 2?
- Asked by Veronica G from Garden City
- Jun 19, 2014
What you do is set up an account with Fitbit website, and use the included USB transmitter to sync y What you do is set up an account with Fitbit website, and use the included USB transmitter to sync your Fitbit to the online website account. Then you can use the app on the iPad2 for displaying the information. …
- Answered by H. W from Livermore
- Jun 25, 2014
I have the fit bit 1 that hooks on my bra or pocket - will/can it count rotations when I'm on the treadmill or stationery bike?
- Asked by Ginny S from Centennial
- May 30, 2014
As long as what you are doing involves movement simulating walking or running or stepping movements As long as what you are doing involves movement simulating walking or running or stepping movements it should record it. For the stationary bike you might want to tuck the unit into your sock or clip it to your shoe. …
- Answered by H. W from Livermore
- Jun 25, 2014
Does the fitbit work without wifi connection? Or does it works even your ipad is at home?
- Asked by Raven Aimee L from Las Piñas City
- Jun 30, 2014
I have large wrists and commonly have to purchase extra large bands for watches. My wrist is between 8.75-9" in diameter. Will this product fit?
- Asked by Brian P from Westfield
- Nov 22, 2013
Is it compatible with other phone brands ,or can only be used with iPhone products ?
- Asked by Beverley P from Melbourne
- May 13, 2014