If you were like me and grew up when Nintendo basically ruled the portable gaming world with Gameboys, you may be interested in bringing back those memories on your iPhone.
GBA4iOS is a neat little hack for the iPhone that allows you to play Gameboy games and it's very easy to setup. It was available for iOS 6 but has now been updated to work with iOS 7. It even works on the iPad.
How To Play Gameboy on your iPhone
First you need to set the date on your device to any time before the 19th of February. This is essential in getting the app installed.
Then all you need to do is click this link when on your iPhone -Download GBA4iOS 2.0.
Then you're all set, it's really as easy as that.
You can find out more about it at its official site - GBA4iOS