With its Blood Oxygen feature restored, Apple Watch regains its edge over Whoop and strengthens its position as the most ...

Macworld Early last year, Apple made the bold, court-mandated decision to remove the blood-oxygen feature from the Apple ...

If Blood Oxygen is not working after installing watchOS 11.6.1 and iOS 18.6.1, a quick Heart Rate and ECG trick may restore the feature without a restart.