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MetroMusic vs Retro Music Player: catalog facts
MetroMusic	Retro Music Player
Free Free and open source under GPL-3.0.	Free Free and open source under the GPL 3.0.
Android	Android
Plays music stored on the device Decodes Apple Lossless in the app	Many themes and now playing layouts Gapless and crossfade playback
Android only F-Droid and release APKs use different signing keys	Android only Plays local files only, no streaming services
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked October 2, 2026

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