Sync from Fitbit to Health app

This app is to sync your fitbit data to your health app.

How to use:
1. Grant the permission to read and write data to the HealthKit store.
2. Tap the 'Sync Fitbit' button to start sync.
3. Log into the Fitbit in the first time.
4. Wait until the sync finish.

Data types supported:
- Steps
- Flights Climbed
- Walking + Running Distance
- Weight
- Body Fat Percentage
- Body Mass Index
- Sleep Analysis (In bed and asleep time)
- Dietary Calories
- Resting Calories
- Active Calories