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Booming Music vs Rhythm: catalog facts
Booming Music	Rhythm
Free Free and open source under the GPL-3.0.	Free Free and open source under the GPL, with no ads.
Android	Android
Material You design with customization options Word-by-word synced lyrics	Material 3 Expressive interface Plays local files and streams
Plays local files only, no streaming services Android only	Android only Young project that changes quickly
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: GPL-3.0-only
Not stated if an account is needed	No account needed
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.