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Petrichor vs Cog: catalog facts
Petrichor	Cog
Free Free and open source.	Free Free and open source, supported by donations.
macOS	macOS
Plays over 40 audio formats including FLAC and ALAC Browse by artist, composer, genre, decade or year	Gapless playback and embedded CUE sheet support Plays a very broad range of formats, plus livestreams and HLS
macOS only Requires macOS 14 or later	macOS only; the Windows and Linux version is still early Requires macOS 12 or later
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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