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JamesDSP vs ViPER4Android: catalog facts
JamesDSP	ViPER4Android
Free Free and open source under the GPL-3.0.	Free The open-source software is available without a license fee.
Linux	Android
System-wide effects for PipeWire and PulseAudio Scripting and API support	Processes audio from every app, not just one player Convolver supports impulse responses for headphone correction
Linux only PulseAudio setup needs separate installation steps	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-3.0-or-later	License not stated
No account needed	Not stated if an account is 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 September 22, 2026

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