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Background Music vs AppVolume: catalog facts
Background Music	AppVolume
Free Free and open source under the GPL-2.0 licence.	Free Free during early access; a paid release with a launch discount is planned.
macOS	macOS
Per-application volume control with boost above maximum Auto-pauses music when other audio plays	Per-app volume from 0% to 200% Remembers volumes between sessions
Still labelled alpha by its developer Auto-pause works only with supported music players	macOS only Still in early access, with future pricing not yet set
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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