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Retro Music Player vs Odyssey Music Player: catalog facts
Retro Music Player	Odyssey Music Player
Free Free and open source under the GPL 3.0.	Free Free and open source under the GPL-3.0.
Android	Android
Many themes and now playing layouts Gapless and crossfade playback	Designed for speed with large music libraries Plays local files without a streaming service
Android only Plays local files only, no streaming services	Android only No published GitHub releases or project homepage beyond the repository and wiki
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-or-later
Not stated if an account is needed	Not stated if an account is needed
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 October 2, 2026

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