Here is another game controller that combines with your iPhone to improve your experience. The Xiaomi Flydigi WASP-X controller sits on one side of your phone and comes with a joystick and buttons you need to play games. This particular version is compatible with iPhone X, iPhone XS, and iPhone XS Max.
This left-handed controller is ideal for prolonged gaming sessions. It doesn’t require a Bluetooth connection to work. The battery lasts for up to 15 hours.[where to find it]