159 reviews
By installing you agree to the Terms of Use and other terms
Get once, download on compatible Windows devices too



File weight

18 MB

Last updated



Works with

  • Windows Phone 8.1

App requires

  • bluetooth
  • contacts
  • HID peripheral
  • internet connection
  • location services
  • microphone
  • photos library
  • video and still capture
  • HD720P (720x1280)
  • WVGA (480x800)
  • WXGA (768x1280)
What's this?

Supported languages (9)

Deutsch English español français italiano 日本語 한국어 中文(简体) 中文(繁體)
show languages
Live a healthier, more active life with Fitbit, the top app for tracking all-day activity, workouts and health.

Use this app on its own to track basic activity, 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.


TRACK ALL-DAY ACTIVITY: Track your daily steps and distance right on your smartphone with MobileTrack for supported Lumia devices. MobileTrack 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.

LOG FOOD: Easily log calories with a credible food database. 

CORTANA BETA (US, UK and AU Only): Using Cortana and a custom Fitbit voice experience, log foods and set alarms with simple natural sentences.  

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 Windows Phone 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.

Fitbit requires Windows Phone 8.1. Lumia devices need to be running the Lumia Cyan firmware.
Surge Run

* View maps of your GPS tracked activities.

Friend Finder Improvements

* Add friends from Facebook
* Add friends with email

Reduce App Install Size

* We’ve cut the size of our app almost in half!

Custom Heart Rate Zones

* You can now create custom Heart Rate zones for your Charge HR and Surge.

Exercise Heart Rate

* Heart Rate will now appear for your tracked exercises.


* New tooltips to help get you familiar with the app.

Improved Setup Flows

Miscellaneous Bug Fixes and Improvements
show details


  • by Alexander 25/02/2015
    The app is buggy and incomplete with less features on it than different phones. Also the fitbit itself is an overpriced wrist band that breaks easily and is pointless
  • by Paul 25/02/2015
    Latest update has broken my syc capability, no longer connects to my charge hr. Otherwise good app, could do with some orientation switches for a larger view of stats and graphs.
  • by William 25/02/2015
    Very good app, syncs straight away and easy to use. Great stuff !!
  • by Barry 25/02/2015
    I really like it but find the food tracker too US centric. Is there a database of UK foods available? May possibly let it go in favour of the MS Band as the health and food tracker I find is much better for my usage
  • by joe 22/02/2015
    Wont activate on my Lumia 735, just get 'unidentified error' with an unhelpful different random code each time!
  • by Phil 22/02/2015
    Excellent app, but caller ID is not yet supported :(
  • by Mel 20/02/2015
    Still doesn't work on my 1020 with denim installed. Does anyone with a 1020 and denim have this syncing with a flex? Mine just sits there trying to find the flex before timing out and starting the whole process again. I really like the app, I really like the flex but I'd have to think twice before buying any FitBit again... and I'm not leaving Windows Phone just to get syncing FitBit working. Windows Phone is too good to go to anything inferior now.
  • by Steve 18/02/2015
    Great to see fitbit support WinPhone. Seems to work well on my Lumia 950. Would be great to see lock screen support and a UK food database in a future version.
  • by DJ 18/02/2015
    Bought flex when it first came out, and had the app soon after it was released. Very pleased hence 5*. Syncing does take minute or so usually but bit of patience is not a problem. Background syncing will drain battery quicker but that's to be expected. App does what I want and when an update causes some problems, they rectify it quickly.
  • by Fraser 18/02/2015
    The app is good but INCREDIBLY slow. It takes 7-10 attempts before it will load the alarms page, and many other pages take a long time to load. You can sync your fitbit in the go though which is nice.