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Adding those would be awesome (Especially if they could still keep the price under $100). The primary reason I use a smartwatch is for all the health-related features. I'd otherwise just wear a dumb watch whose battery will last me 10 years.

The problem I have seen is the ultra cheap watches that have these features are so inaccurate that you may as well not have them. I'm not even convinced pulse ox is accurate on the Apple Watch.

This product linked is more of a toy to play with and not what you would use daily.

The pulse ox is pretty cool to have around given that lots of people develop asymptomatic covid and are hospitalized much later with very low o2 sat.

GPS and maaaybe compass are the only two things I lack in Watchy