What is core sleep is on your Apple Watch, and does it even matter? We look at which sleep stages matter most for quality ...

Apple’s sleep charts can feel like a nightly report card, and “core sleep” often ends up in the spotlight. Yet the science behind wearables suggests that fixating on that one stage is a distraction ...

Apple added a new Sleep Score feature that gives you a single number to sum up how you slept. It pulls data from your Apple Watch and turns it into an easy rating you can check first thing in the ...

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 ...

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 ...

If you use a third-party sleep tracker with your Apple Watch, you’re probably familiar with the concept of a sleep score: an index that combines signals like heart rate variation and sleep stages, to ...

Earlier today we saw iOS 26 code suggesting that an Apple Watch sleep score feature is in development, with a percentage score indicating your readiness to tackle the day ahead. The feature also ...

When Apple releases its new lineup of Apple Watches, they'll come packed with a slew of new features designed to give users more out of the smartwatch. One of those features, called Sleep Score, will ...

I’ve used many of the best smartwatches, but when it comes to sleep, few companies offer the same Sleep detail and insight that Samsung does. Sleep has been core to the Samsung Health strategy since ...