The "Sync Now" button is greyed out. What should I do? December 03, 2019 21:58 Updated If your "Sync Now" button is greyed out, simply log out of the app and log back in. Related articles Sync Now button is greyed out? Does myFitnessSync sync all my historical data? How far back can it sync? myFitnessSync - Fitbit to Apple Health - iOS Instructions My steps didn't sync to Apple Health How do I make myFitnessSync the #1 data source, and Apple Health #2?