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RetroArch vs FCEUX: catalog facts
RetroArch	FCEUX
Free Free and open source, funded by donations.	Free Free and open source under the GPL.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux
Configure once and every emulator core inherits the settings Runs on desktops, phones and a long list of games consoles	Lua scripting and frame-precise movie recording for tool-assisted runs Debugger, hex editor and PPU viewers built in
The settings menu is deep and intimidating the first time You still have to download cores, and some systems need BIOS files you must supply	Interface is dated and dense with developer tools NES and Famicom only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
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 September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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