How can you make an iPhone App?

To make an iPhone app, you must first go to Apple.com and signup as a developer. then you can download the SDK for free. But you must use a Mac for development, not a PC. Then after it is downloaded, I suggest to go to any book store and buy a book on Objective - C. And if you want your iPhone app to be a game, you would use OpenGL ES or OpenGL or OpenCL, to animate it. OpenGL ES, OpenGL, and OpenCL all come free with the iLife 09' package. Then when you finish coding you iPhone app, you go to the iPhone Dev Center and publish your app. If Apple aproves of your app, it's up for the world to see. If your not familiar with creating apps try this its awesome http