Many smartwatches, fitness and wellness trackers now offer sleep tracking among their many functions. Subscribe to our newsletter for the latest sci-tech news updates. Wear your watch or ring to bed, ...

Wearable sleep tech, like smart watches or rings that take real-time health metrics, have made it super easy for the average snoozer to track their sleep from one night to the next. But is all that ...

Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings. When you purchase through links on our site, we may earn ...