You don’t need a fancy game controller to play on your phone but it can help improve your performance. The RiotPWR ESL is an iPhone compatible game controller with two joysticks, a D-pad, and all the buttons you need to perform in games. With Ludu Mapp, you gain access to over 1000 compatible iOS games and apps.
This game controller has a headphone port too. This particular version has a Lightning connector with pass-through charging. More information is available here.