The Index sleep monitor has two parts: the hardware, which is a flat little nugget of plastic and electronics, and the fabric band. The band is wide, soft, and stretchy. It’s about 2.5 inches wide, ...

The Apple Watch doesn’t track your sleep without the use of a third-party app, which means wearing it all night, and finding another time to charge it up. Yes, it’s workable, but it’s not ideal, and ...

The Xiaomi Mi Band series is an affordable jack of all trades. It can track daily activity and several health metrics like blood oxygen levels, stress, and the hours and minutes spent asleep. Rest is ...

A Garmin sleep band has been a common request on the Garmin forums and subreddit for years. Some hate wearing a bulky Garmin watch to bed, but don't want to miss out on Body Battery data. Others want ...

Garmin's new Index Sleep Monitor fits around the arm to track breathing variations, sleep stages, heart rate variability, skin temperature and more. Caroline Igo Former Editor, Sleep Caroline Igo (she ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. I woke up this morning ...