08-09-2016 19:41
08-09-2016 19:41
08-09-2016 19:42
08-09-2016 19:42
08-10-2016 07:48
08-10-2016 07:48
Welcome to the Forums @tandreacola! By now there's no way to sync Apple Health App with Fitbit App. However, there's a feature request where several users are asking to get this. It seems our team has considered to implemented. You should take a look at this: Integrate with iOS 8 Health App. And add your vote to show support.
Hope this clarifies your inquiry. Let me know if further questions arises.