Wearables and smart sleep devices—such as watches, rings, mats, and smart beds—track things like sleep time, patterns, movement, heart rate, and sometimes oxygen levels. They can help raise awareness of sleep habits and encourage healthier routines, but their accuracy is limited since they rely on algorithms rather than medical testing. They’re useful for spotting general trends but can’t reliably identify sleep stages or diagnose conditions like sleep apnea. While some devices may flag signs such as oxygen drops, snoring, or restlessness, only a medical sleep study can confirm a disorder.
