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Cog vs Harmonoid: catalog facts
Cog	Harmonoid
Free Free and open source, supported by donations.	Free Downloads are offered from the website and GitHub releases with no price listed.
macOS	Windows, macOS, Linux, Android, iOS
Gapless playback and embedded CUE sheet support Plays a very broad range of formats, plus livestreams and HLS	Runs on desktop and mobile platforms Broad format support through mpv and FFmpeg
macOS only; the Windows and Linux version is still early Requires macOS 12 or later	Focused on music, not video License terms are not stated on the homepage
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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