Withings ScanWatch review
While it has the good looks of a classic watch, it has the ability to serve as a clinically validated electrocardiogram, capture blood oxygen measurements, measure breathing frequency while sleeping, track your heart rate, and more, all while lasting about a month between charging. As I have talked about many times, I cannot use a smartwatch regularly since I cannot stand having to charge my watch more than once a week, and with the ScanWatch, you just wear it and forget it... More here.
Probably the closest we have got so far to a fitness watch that feels like a real watch.