MAME is constantly updated to improve emulation accuracy. This means ROM files must "match" the version of the emulator you are using.
The Ultimate Guide to MAME ROMs Packs for Android (2026 Edition) mame roms pack for android
This guide covers everything you need to know about finding compatible ROM sets, setting up the best emulators, and organizing your retro library. What is a MAME ROM Pack? MAME is constantly updated to improve emulation accuracy