Compare software

Sleep Cycle vs Pillow: catalog facts
Sleep Cycle	Pillow
Freemium Free to download, with premium features offered through a subscription after a free trial.	Freemium Free on the App Store with optional paid features.
Android, iOS	iOS
Sleep tracking with only a phone Smart alarm that wakes you in lighter sleep	Works on Apple Watch, iPhone and iPad Records sleep audio such as snoring
Main features are pushed toward a paid subscription Sound-based tracking is an estimate	Apple devices only Some features need payment
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
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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