ATLANTA (AP) — Your watch says you had three hours of deep sleep. Should you believe it? Millions of people rely on phone apps and wearable devices like rings, smartwatches and sensors to monitor how ...

I compared Fitbit Air and Whoop MG sleep tracking over seven nights to see how closely the two agreed.

Sleep trackers can be helpful, but relying too much on the data and not listening to body cues can make you anxious about ...

San Francisco-based startup Hello has raised $20 million in a round led by Singapore-based investment firm Temasek for its sleep tracking, bedside orb, Sense, according to the Financial Times. This ...

China-based Sleepace, which has developed a sleep tracking device, raised $7 million in a round led by retail chain Luolai Home Textile with participation from ecommerce giant JD.com, according to a ...