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SMS Plus vs Gearsystem: catalog facts
SMS Plus	Gearsystem
Freemium The emulator is a free download; the Emulator Enhancer add-on is shareware.	Free Free, with source code published on GitHub.
macOS	Windows, macOS, Linux
Accurate Master System and Game Gear emulation YM2413 FM sound and CodeMasters mapper support	Focus on accurate emulation Built-in debugger for developers
macOS only Gamepad and full screen support need the paid Emulator Enhancer	Covers only Sega 8-bit systems
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
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 September 23, 2026

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