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Rhythm vs MetroMusic: catalog facts
Rhythm	MetroMusic
Free Free and open source under the GPL, with no ads.	Free Free and open source under GPL-3.0.
Android	Android
Material 3 Expressive interface Plays local files and streams	Plays music stored on the device Decodes Apple Lossless in the app
Android only Young project that changes quickly	Android only F-Droid and release APKs use different signing keys
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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