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Flac-R vs Retro Music Player: catalog facts
Flac-R	Retro Music Player
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL 3.0.
Android	Android
Supports MP3, FLAC, M4A, OGG, Opus and AAC Edits embedded album art	Many themes and now playing layouts Gapless and crossfade playback
Android only Small, young project maintained by one developer	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
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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