Why isn't it syncing Heart Rate? December 03, 2019 21:57 Updated Unfortunately, Fitbit only gives 3rd party apps access to resting heart rate, so we are unable to sync intraday heart rate Related articles Does myFitnessSync sync all my historical data? How far back can it sync? Sync Now button is greyed out? Why are my Fitbit steps different from Apple Health? My steps didn't sync to Apple Health The app isn't auto-syncing?