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 o

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.