Update of Fitbit FlashRing watch face to incorporate Continuous Glucose Monitoring (CGM) data from compatible API data source (e.g. xDrip+, Spike, or Nightscout).

Provides:

Current reading info on main face

Tap access to a historical graph of previous 4 hours of readings.

Vibe alerts when High or Low thresholds are breached.

Settings provides Colors, Date format, CGM Data Source, Preferred Units, BG thresholds, Pause/Snooze Timer values.

12/24 hour clock preference requires setting preference in fitbit profile via fitbit web dashboard.

Supports OS 4 and 5 watches, new development on OS5 (Versa 3/Sense) with bugfixes being ported back to OS4 only.