It is important to say，this app is not from Fitbit.We just use the open platform from Fitbit and sync data from the Fitbit to Apple Health.
Fitbit Sync makes a bridge between Fitbit and Apple Health
The data type as follows are supported:
6、Body Mass Index
9、Body Fat Percentage
11、Heart Rate(resting heart rate for now)
Maybe some of them are not supported,it depends on your fitbit device.
Data details is being developed.Will come soon.
Thanks for your time and please keep focus on us.
If you have some advice or suggesions,please contact us. firstname.lastname@example.org