WatchOS 9 can detect REM, core and deep sleep, as well as offer heart health support and prompt you to take meds. Sarah Mitroff has worn many hats at CNET, including Senior Mobile Editor and Managing ...

Feeling groggy in the morning? Wondering if you're getting enough shut-eye? Your Apple Watch might have the answers you're looking for. With the built-in sleep app, you can easily track your sleep ...

Let's talk about one of the most confusing terms you’ll see on your fitness tracker—specifically your Apple Watch. Next to REM sleep, which you’ve probably heard of, and “deep” sleep, which feels self ...

Besides sweating along to Apple Fitness+ workouts, there is important data stored in your iPhone that you should focus on when it comes to fat loss: sleep. Poor sleep quality and duration can lead to ...

Unless you’re participating in a sleep study, there’s no real way to know how you’ve slept other than conducting some personal inquiry. Do I feel tired today? When did I actually go to bed? It’s not ...

When it was first released in 2015, the Apple Watch quickly earned the mantle of the best-selling device in the category, and millions of users have it on their wrists today. Its seamless pairing with ...