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EarTrumpet vs Volume²: catalog facts
EarTrumpet	Volume²
Free Free and open source.	Free Freeware with no ads; the Microsoft Store version offers a way to donate.
Windows	Windows
Per-app volume sliders from the taskbar Quicker than opening the Windows volume mixer	Mouse wheel and hotkey control of volume anywhere on screen Per-application and per-device volume control
Windows only Focused on volume control rather than audio effects or routing	Windows only Freeware licence rather than open source
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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