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SoundSource vs AppVolume: catalog facts
SoundSource	AppVolume
Paid Paid app with a free download to try it before purchase.	Free Free during early access; a paid release with a launch discount is planned.
macOS	macOS
Per-app volume and output device routing Audio effects and Audio Unit support for any app	Per-app volume from 0% to 200% Remembers volumes between sessions
macOS only Paid after the trial	macOS only Still in early access, with future pricing not yet set
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it 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.