Great for Apple Watch!

This app is a handy utility for getting your health and fitness data back and forth between FitBit and your iDevice. This is perfect for people making the switch from low-quality FitBit devices to the Apple Watch.

It doesnt do all-day syncing unless your phone is unlocked and on WiFi all day. This apps sync is completely manual, but its apparently a privacy setting with iOS Health app so not much can be done.

That being said, when you sync your data it gets there reliably. Good job!

CoderHead about Sync Solver - Health to Fitbit