Snooze tracking in watchOS 9 delivers more insights With all the introduction of snooze phases. Apple Watch works by using alerts from the accelerometer to estimate when end users are in REM, Core, or Deep snooze. Something I'm able to say needless to say is definitely the watch band matters, https://back-support-for-scoliosi74948.thechapblog.com/26530573/5-simple-techniques-for-how-does-apple-watch-band-work