Compare software

Sleep CycleSleepWatch
Freemium

Free to download, with premium features offered through a subscription after a free trial.

 Freemium

Free to use, with a Premium subscription for extra features.

Android, iOS Android, iOS
  • Sleep tracking with only a phone
  • Smart alarm that wakes you in lighter sleep
  • Uses Apple Watch heart rate, HRV and blood oxygen data
  • Activity tagging to link habits with sleep quality
  • Main features are pushed toward a paid subscription
  • Sound-based tracking is an estimate
  • Richest data depends on owning an Apple Watch
  • Some features require Premium
Downloadable app Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.