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Wavelet vs Equalizer APO: catalog facts
Wavelet	Equalizer APO
Freemium A free edition or tier is available. Additional features or hosted services require…	Free Free and open source under the GPL, distributed through SourceForge.
Android	Windows
Provides headphone correction profiles Includes manual equalizer controls	Works at the system level, so every application on a device is equalised Parametric and graphic filters, with no practical limit on bands
Compatibility varies by music player and device; some features are paid.	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
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 21, 2026

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