Fitbit will be preloaded on the new HTC One (M8) in select markets. Fitbit has hit one million downloads total on Android. Fitbit launched on Android in March 2012. Fitbit is now supported on 44 Android devices. According to Distimo, Fitbit is also the most popular fitness tracking app on Google Play. Fitbit accounted for 83% of installs among the top apps in that category.