Non-wearable smart mattresses can even adjust your body temperature based on your sleep history to give you the best chance of a good night’s rest and a quality sleep. The best sleep trackers can also offer help if you struggle to fall asleep, with headphones available to block out distractions and relax a chaotic mind. We’re also big fans of sleep-based alarms, that wake the wearer up at the optimum time of their sleep cycle, to help you hit the ground running each day. How this data is then used makes a big difference, with some apps offering deep-dive analytics as well as a Sleep Score that, like hitting your 10,000 steps, helps to glamify good sleep. Brands like Whoop, Fitbit and Apple are also using blood oxygen data that can help identify sleep disorders including sleep apnea, a potentially dangerous condition where breathing stops and starts while you're asleep. It’s the most important sensor in any sleep tracker.īut how long you sleep doesn’t always determine the quality, which is why many factors are used to build an accurate picture of your sleep, including temperature, breathing disturbances, body movement via accelerometers and even ambient noise. Less sophisticated fitness trackers have tended to use wrist movement to monitor sleep-stop sniggering at the back-but now the vast majority use heart rate instead to calculate when you fall asleep, the type of sleep you’re having and how long you stay asleep. What features should I look for in a sleep tracker? Developed with sleep physicians, it's capable of tracking your sleep cycles to provide a sleep score, along with the ability to detect snoring and sleep apnea. Rather not wear anything at all? Withings' under-mattress tracker is for you.

Shuteye sleep tracker