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Museeks vs Gapless: catalog facts
Museeks	Gapless
Free Free to download, with source code on GitHub.	Free Free and open source under the GPLv3.
Windows, macOS, Linux	Linux
Builds for Windows, macOS and Linux, including ARM Many Linux package formats including Flatpak and AppImage	Light and quick to start Modern GTK4 and libadwaita interface
Intentionally limited feature set Pre-1.0 version numbering	Linux only Focused on playback rather than library management
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
No account needed	No account needed
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.