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Plees Tracker vs Sleep as Android: catalog facts
Plees Tracker	Sleep as Android
Free Free and open source under the MIT license.	Freemium Free to try, with paid features unlocked by purchase.
Android	Android
No battery drain while you sleep Stores past sleeps and shows the daily average	Smart alarm based on sleep phase tracking Works with phone sensors or wearables
Manual start and stop only, no sensor-based sleep analysis Android only	Android only Large feature set can take time to configure
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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