The company the feature is simply there to help users understand their fitness and wellness.
If you need to connect your family and sync between devices, we offer a Family Sync plan.
The plethysmograph in the Apple Watch that measures pulse works essentially the same way.
It appears that the issue is due to me setting up this app prior to having the series 7 watch.
The measurement takes fifteen seconds, after which it will present a percentage of the oxygen content in the blood.
Millions of Americans own an Apple Watch, which commands roughly a of the smartwatch market.