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idTech4A++ vs Ironwail: catalog facts
idTech4A++	Ironwail
Free Free and open source under the GPL-3.0 licence.	Free Free and open source; requires your own Quake game data.
Windows, Linux, Android	Windows, Linux
Supports a long list of idTech and related game engines in one app Actively developed with frequent commits	Built for high performance Based on the widely used QuakeSpasm
Game data files are not included Setup per game can take some effort	Requires game data from a copy of Quake Covers the original Quake only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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