How do I make myFitnessSync the #1 data source, and Apple Health #2? December 03, 2019 22:33 Updated Related articles myFitnessSync - Fitbit to Apple Health - iOS Instructions How do I sync my Fitbit steps with the Apple Health app? Why am I seeing duplicate data in the Apple Health app? Does myFitnessSync sync all my historical data? How far back can it sync? What is the difference between Fitbit to Apple Health Sync, and Health App to Fitbit Sync?