This Bluetooth Game Controller from Allputer works with iPhones and even iPads. (Allputer says it has a known problem with Android devices running Android 4.0, but it should be compatible with devices running some other versions of Android.) The controller has a telescoping holder at the top to hold your phone in place, or you can use it with a tablet. It has a rechargeable internal battery for long game play, and it connects to phones or tablets via Bluetooth 3.0. Allputer says it should be compatible with a variety of games; check the item’s webpage for a list of games and how to set up the controller for various types of games.
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Given the clamp design, it seems like variation on the Gametel controller i have here, but with added analog inputs. Do wonder what the max width of the device can be, the Gametel one tops out at around 65mm.
Connects easily, but good luck finding a game this actually works on. Even simple games it claims to work on doesnt work. Two thumbs down.