r/sleep•11 mo. ago

Apple Watch says you got 51 min deep sleep. Lab truth: 94 min. But here’s the real lie: → It only detects 47.7% of actual deep sleep (Table S4) Oura: 76.8% Fitbit: 61.8% Apple: HALF #SleepTruth2025 #Applewatch

Posted Nov 9, 2025, 7:44 AM UTC

Comments aren't archived yet

This post had 7 comments on Reddit. Comments for this period haven't been loaded into the archive yet.

Apple Watch says you got 51 min deep sleep. Lab truth: 94 min. But here’s the real lie: → It only detects **47.7%** of actual deep sleep (Table S4) Oura: 76.8% Fitbit: 61.8% Apple: **HALF** #SleepTruth2025 #Applewatch