As of today, Apple has opened the native Application Programmaing Interfaces (APIs) and tools that Apple uses for iPhone and iPod Touch development. Coding for all layers, covering: Core OS X, Core Services such as address book and database, Media (including H.264 MPEG-4, positional audio, PDF) and Cocoa Touch for UIs.Xcode supports full set of iPhone/iPod Touch interface elements. Software is downloaded, debugged and profiled (with Instruments a.k.a. Xray or DTrace) live using the regular USB cable. IPhone Simulator simulates entire API stack for local debugging.Details follow. Software Development