Can you write and put Custom Apps on your IPhone without joining the IPhone Developer Program?

If I want to write some custom IPhone Apps, b开发者_JAVA百科ut not necessarily distribute them through the App Store, is this possible, without joining the IPhone Developer Program?

Lets say I just want to write some little Utility App for myself and put it in my Iphone/Touch, is this possible without joining one of the developer programs?

Not unless you jailbreak your device. You have to pay the $99 to be able to install software on the iPhone. Otherwise you can only test in the iPhone Simulator.