MAME vs Retropa

MAME is a free emulation framework intended to preserve software history by documenting and reproducing the inner components of arcade machines, computers, consoles, calculators, and other electronic amusement systems. It can emulate over 32,000 individual systems from the last five decades. Alongside emulation, it includes an interactive low-level debugger for investigating software behavior, diagnosing emulation issues, and developing software for vintage systems. Its Lua interface can inspect device state, access CPU registers, read and write memory, and draw overlays, though the API may change without notice. Plugins support uses such as external-program communication and alternate interfaces; included examples are Discord Presence and a GDB Stub. MAME can save and load states, record inputs for playback, and capture screenshots or video. It is available for Android, Linux, macOS, and Windows; official Windows binaries require Windows 10 or later. BIOS dumps and copyrighted software are generally not included. The project is distributed under GPL-2.0 overall, while more than 90% of files, including core files, are under BSD-3-Clause.

Retropa is an emulator for handheld and arcade games on iPhone and iPad, with Mac listed among its supported platforms. It covers 14 handheld and console systems plus arcade families; listed systems include GBA, Nintendo DS, NES, Super NES, Genesis, WonderSwan, Neo Geo Pocket, and Master System. The free plan costs nothing and includes handheld and console systems, imports, controller templates, Delta skin import, save states, and rewind. Games and BIOS files are not supplied, so users import content they are entitled to use through Files, AirDrop, a browser, a local Wi-Fi Portal, or the Homebrew catalog. Compatible external controllers and ready-made templates are supported. Retropa Plus adds arcade families, premium skins, console mode, advanced save workflows, adaptive touch controls with five styles, and 64 listed display filters. Saves can be backed up and restored with iCloud Drive. Game files stay on the device, and no account is needed to play. iPhone and iPad require iOS 18 or later.