Apple opened the door for emulators to appear on the iOS App Store, removing the need for any jailbreaking, or using something like the AltStore. Delta, one of the most popular Nintendo iOS emulators immediately took advantage of this opening, and has shot up to the top of the iOS charts as a result.
The Delta emulator is currently the top downloaded free app on the App Store for iPhone. The emulator has been downloadable for several days at this point and has a near perfect rating across over 9000 reviews.
The Delta emulator supports the emulation of several Nintendo game consoles, including the NES, SNES, N64, Game Boy Colour, Game Boy Advance and even the Nintendo DS. The emulator also has baked in controller support for gamepads like the Switch Pro controller, DualShock/DualSense, Xbox controllers and other third-party MFi controllers.
Delta also supports cheat engines like GameShark, Action Replay, Code Breaker and the Game Genie, so if you want to mess around a bit in your games, you can do so pretty easily.
Nintendo has not yet raised issue with this, but ultimately as Apple now has to support third-party stores due to new laws in Europe, there is no real undoing of this, outside of shutting down the developers of the app via a lawsuit. Nintendo did recently win one such battle, forcing the developers behind the Yuzu emulator to shut down operations.
KitGuru Says: This is something that has been possible on Android for years. It has also been possible on iOS, but often required jumping through some hoops to set up. Now, it is as easy as installing almost any app, which could lead to Nintendo turning its legal attention towards a number of ROM sites again.
