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? The app isn't auto-syncing? My steps didn't sync to Apple Health Sync Now button is greyed out?