60 nights testing 4 sleep tracker apps + comparison to Apple Watch Series 9 reference.
Top picks
1. AutoSleep (Apple Watch only · $4.99 one-time) – Best automatic. Most accurate per scientific comparison.
2. Sleep Cycle (free · $39.99/yr premium) – Best phone-only. Smart alarm.
3. Pillow Auto Sleep Tracker (free · $19.99/yr) – Best for Apple Watch + iPad bedside.
4. Apple Health (built-in · free) – Best baseline. Works with Apple Watch.
Accuracy comparison
Apple Watch + AutoSleep: most accurate (vs polysomnography). Sleep Cycle phone-only: accuracy decent but not surgical. Apple Health: good for trends.
⚠ AI-assisted research synthesis · human-edited by SUJI KIM · EU AI Act Art. 50 transparency
🔗 As an Amazon Associate I earn from qualifying purchases.
By SUJI KIM · About · 30-day refund Gumroad standard