They suck for sleep tracking.

Yes,only off to charge

I have my AW on the left wrist and my regular everyday analog watch on my right wrist

I like the red one

Will this read temps at all times or only during the sleep focus on

I remember when I had a Fitbit I heard about this app and was jealous I couldn’t get it. I am now running to the App Store

Can you be more specific

This is why I hate the rings

Please do not call it a medical device. It absolutely is not a medical device and is very misleading when you call it that. Apple clearly states all stats are an approximation and not to be used in the diagnosing or monitoring of medical treatments/conditions.