If you already own game files (ROMs), you can use a standalone emulator. These apps typically do come with games included; you must provide your own neogeo.zip BIOS file.
: If the bundled APK is buggy or full of ads, consider downloading a clean emulator like NEO.emu Free and finding your own ROM sets for better stability. reputable sites Descargar Apk Neo-geo Con 50 Juegos En 1 Para Android