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SMS Plus vs Genesis Plus GX: catalog facts
SMS Plus	Genesis Plus GX
Freemium The emulator is a free download; the Emulator Enhancer add-on is shareware.	Free The open-source emulator is available without a license fee.
macOS	Windows, macOS, Linux
Accurate Master System and Game Gear emulation YM2413 FM sound and CodeMasters mapper support	One core covers Mega Drive, Sega CD, Master System, Game Gear and SG-1000 Accurate sound emulation, including the Sega CD's PCM
macOS only Gamepad and full screen support need the paid Emulator Enhancer	Usually run through RetroArch rather than as a standalone application
Downloadable app	Downloadable app
Closed source	Open source
License not stated	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 2, 2026	Official website Full listing and sources Checked September 22, 2026

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