Apple is already refining one of its key new features, adjusting the classifications for its Sleep Score in the latest beta ...

Unveiled at the "Awe Dropping" event, Sleep Score isn't an Apple Watch Series 11 exclusive. Here's a look at how it works and how to try it yourself. Apple has been taking sleep tracking more ...

We all have days where we wake up after clocking the usual sleep hours, but still feel fatigued and wonder if there was something wrong during the rest hours. For such situations, the sleep tracking ...

For a while now, I’ve worn two devices when I go to sleep—an Apple Watch Series 7 on my left wrist, and a WHOOP 5 MG on my right wrist. Every morning, I get three different scores purporting to tell ...

If you've noticed your Fitbit sleep score taking a nosedive recently, don't panic—and definitely don't assume you've unknowingly developed insomnia. It seems Fitbit has quietly rolled out improvements ...

The Series 11 can detect potential chronic high blood pressure by analyzing blood vessel response patterns over 30 days using its optical heart sensor. Apple trained this capability using machine ...