[ksmith14]

From the blog post announcing the FitbitOS 4.1 SDK it sounds like custom always-on clocks are in the works:

https://dev.fitbit.com/blog/2019-12-19-announcing-fitbit-os-...

(Disclosure: I work at Fitbit but not on any of the SDK or device stuff. This is my own personal opinion and should not be considered the official position of my employer.)

[VectorLock]

When will the spo2 feature ever materialize on existing Fitbits that have the hardware for it?