Apple iPhone SDK… The iPhone Developer Program provides a complete and integrated process for developing, debugging, and distributing your free, commercial, or in-house applications for iPhone and iPod touch. Complete with development resources, real-world testing on iPhone, and distribution on the App Store, you have everything you need to go from code to customer. The iPhone SDK includes the Xcode IDE, Instruments, iPhone simulator, frameworks and samples, compilers, Shark analysis tool, and more.


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