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Calm vs Pzizz: catalog facts
Calm	Pzizz
Freemium Can be tried for free, with the full library in a paid subscription.	Freemium A free version is available, with a paid full version.
Android, iOS	Android
Large library of guided meditations and sleep content Soundscapes for relaxing or falling asleep	Separate modes for night sleep and short naps Combines soundscapes with voice cues
Much of the content requires a paid subscription Proprietary service that needs an account	Full features need a purchase Not a sleep tracker; it does not measure sleep
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account 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 October 2, 2026

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