All you data will sync with Sync Solver App.Grant the Sync Solver all the permission it requires after which it automatically opens.You will be redirected to Fitbits official website.
FITBIT CONNECT DOWNLOAD ANDROID PHONE INSTALL
Head to the Apple Store and install the Sync Solver for Fitbit.
Here is how you will sync your Fitbit to iPhone and Apple Health
FITBIT CONNECT DOWNLOAD ANDROID PHONE HOW TO
How to Sync Your Fitbit to iPhone and Apple Health
Pairing your Fitbit or other smartwatches like the Garmin, Misfit, Polar, and Withings with iPhone helps keep all health data in one place which eases retrieving. Apart from iPhone being able to work with the Apple Health App, 3 rd party devices can too.