About iPhone SDK
With this software you can develop applications that run on iPhone and iPod touch. Includes the Xcode IDE, Instruments, iPhone simulator, frameworks and samples, compilers, Shark analysis tool, and more.

With over 1,000 new APIs, iPhone SDK provides developers with a range of new possibilities to enhance the functionality of their applications. New APIs also provide support for applications to communicate with hardware accessories attached to iPhone or iPod touch.

What’s New in this Version
- Instruments can now profile your application on a device via WiFi connection. Read the release notes for instructions on how to set this up for your devices.
- Organizer: the iPhone Development grouping now collects crash logs, install bundles, and provisioning profiles in a single location
- iPhone OS 3.1 Simulator uses frameworks more closely matching the device