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SleepWatch vs Sleep Cycle: catalog facts
SleepWatch	Sleep Cycle
Freemium Free to use, with a Premium subscription for extra features.	Freemium Free to download, with premium features offered through a subscription after a free trial.
Android, iOS	Android, iOS
Uses Apple Watch heart rate, HRV and blood oxygen data Activity tagging to link habits with sleep quality	Sleep tracking with only a phone Smart alarm that wakes you in lighter sleep
Richest data depends on owning an Apple Watch Some features require Premium	Main features are pushed toward a paid subscription Sound-based tracking is an estimate
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.