Game controllers for iPhone are nothing new. Plenty of mobile gamers use them to perform better at their favorite games. The GEED H1 is a smartphone holder with an integrated game controller that can handle devices from 4.5 to 6 inches. It supports a wide variety of mobile apps such as Fortnite, FIFA, Arena of Valor, and GTA.
The joystick gives you better control in your favorite games. You can use the H1 with your iOS and Android phones. More info is available here.