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 myFitnessSync - Fitbit to Apple Health - iOS Instructions Does myFitnessSync sync all my historical data? How far back can it sync? My steps didn't sync to Apple Health Why are my Fitbit steps different from Apple Health? Sync Now button is greyed out?