The app doesnt work. My health app & Fitbit will not sync. I contacted customer service for a solution (via fb, as the app instructs), & received rude messages saying the app isnt broken & doesnt need fixed. They said theyve never heard of this problem but there are other comments on their fb page indicating others have the same problem. Go with a different app.
DutchBunny77 about Health Sync for Fitbit, v2.7.3