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Harmonoid vs Kopuz: catalog facts
Harmonoid	Kopuz
Free Downloads are offered from the website and GitHub releases with no price listed.	Free Free and open source under the EUPL-1.2, supported by sponsors.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android
Runs on desktop and mobile platforms Broad format support through mpv and FFmpeg	Local files and many music services in one library Synced and word-timed lyrics display
Focused on music, not video License terms are not stated on the homepage	Apple Music playback only works on desktop Streaming sources need accounts with those services
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: EUPL-1.2
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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