myFitnessSync downloads your entire Fitbit history from Fitbit.com and stores it on your iPhone in Apple Health. After syncing your data manually for the first time the app will auto-sync your data in the background multiple times a day. Thank you for making us one the most popular Health & Fitness Apps on the App Store!!! What an honor to break into the top 10. Syncing your Fitbit data everyday with myFitnessSync for your iPhone allows you to use the Apple Health app to view your Fitbit data and any other fitness or medical data in one app. Fitbit Aria scale data will also be added to Apple Health when you sync. One click sync: Launch myFitnessSync before you launch the official Fitbit app. Click "Sync Now". myFitnessSync will launch the the Fitbit app for you. Wait for the Fitbit app to finish syncing. Click "Back to myFitnessSync" at the top left of the Fitbit app. When myFitnessSync returns it will start syncing your data to Apple Health. When syncing completes click "Launch Health App" to view your data. (Launching the Health App is only supported on iOS 10). myFitnessSync syncs up to 14 fields. You can customize the app to only sync the fields you want: Steps, Walking + Running Distance, Active Energy, Resting Energy, Dietary Energy (Food Calories), Sleep Analysis, Time In Bed, Time A Sleep, Weight, Body Fat Percentage, Body Mass Index (BMI), Lean Body Mass, Resting Heart Rate, Flights Climbed, Water / Hydration. Note: Fitbit restricts access to all-day heart rate data. We hope to have access to intraday data soon.