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Rhythmbox vs Gapless: catalog facts
Rhythmbox	Gapless
Free Free and open source under the GPL v2.0 or later.	Free Free and open source under the GPLv3.
Linux	Linux
Library management, podcasts and internet radio in one app Fits the GNOME desktop	Light and quick to start Modern GTK4 and libadwaita interface
Built for Linux desktops, with no official Windows or macOS build Project page gives little detail on features	Linux only Focused on playback rather than library management
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-3.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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