Downloads such as GBA4iOS enable devices such as iPads to run Gameboy games – but you must first check that the download is compatible with your device’s iOS version. Then you need to explicitly follow the instructions. Be careful about jailbreaks and other Apple security exploits that could jeopardize the security of the data on your device. Also be aware that the holes exploited by the security hacks are usually quickly filled by Apple thus breaking the emulator.