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Equalizer APOViPER4Android
Free

Free and open source under the GPL, distributed through SourceForge.

 Free

The open-source software is available without a license fee.

Windows Android
  • Works at the system level, so every application on a device is equalised
  • Parametric and graphic filters, with no practical limit on bands
  • Processes audio from every app, not just one player
  • Convolver supports impulse responses for headphone correction
  • Applications using ASIO or WASAPI exclusive mode bypass it entirely
  • The native interface is a text configuration file; sliders need the separate Peace front end
  • Requires root and a Magisk module install
  • Configuration is overwhelming and easy to make sound worse with
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked September 22, 2026

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