One of the top posts for the fitness tracker’s support forums concerns the disability to sync data off of a Fitbit to your Android 6.0 Marshmallow device. The Fitbit app doesn’t seem to recognize the tracker.
Fitbit’s support team also addressed an Android Central editor’s query:
@jaduino If it’s an official Android 6.0 Marshmallow build, it should be fine as we added support on production.
— Fitbit Support (@FitbitSupport) October 6, 2015
But as of 9:30pm ET, the problems still persist despite the fact that Fitbit claims its devices support Android 6.0 and that users are loading Marshmallow vanilla.