How Accurate Are Sleep Trackers? (Apple Watch, Oura, Fitbit 2026 Test)

Subscribe:    / @applab.studioo   How accurate are sleep trackers in 2026? We tested Apple Watch, Oura Ring, and Fitbit against polysomnography (the clinical sleep-lab standard). The result: wearables are over 95% accurate at detecting sleep vs wake, but as low as 50% accurate at scoring your sleep STAGES - and the deep-sleep number you care about most is the one they get most wrong. What the 2026 accuracy research actually shows, and how to use your tracker without being misled. Related: The 8-hour sleep rule is a myth -    • The 8-hour sleep rule is a myth. Here's th...   Which tracker do you use? Drop it in the comments and I will tell you what it is good and bad at. #sleeptracker #applewatch #ouraring #fitbit #sleepscience