How to Use Blood Oxygen Data on Apple Watch, Garmin, Fitbit, Samsung

The latest smartwatches come with sensors that measure oxygen levels in your blood. If you own one, here’s what that means for you.

How to Use Blood Oxygen Data on Apple Watch, Garmin, Fitbit, Samsung
The latest smartwatches come with sensors that measure oxygen levels in your blood. If you own one, here’s what that means for you.