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Quod Libet vs Harmonoid: catalog facts
Quod Libet	Harmonoid
Free The open-source application is available without a license fee.	Free Downloads are offered from the website and GitHub releases with no price listed.
Windows, macOS, Linux	Windows, macOS, Linux, Android, iOS
Flexible metadata searches and plugin support	Runs on desktop and mobile platforms Broad format support through mpv and FFmpeg
Primarily designed around managing an audio library.	Focused on music, not video License terms are not stated on the homepage
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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