
On April 5, retro gaming emulators on iPhone and iPad were allowed to be downloaded from the App Store, per Apple's rule change. Soon after, apps like Delta were released, letting users run games from Nintendo’s console and handheld devices from long ago.
You can even connect a gaming controller to your iPhone and play all of these games without using the touch screen. However, it’s not as simple as loading up an app like Delta or Provenance, choosing the console you want it to emulate, and playing any game you want.