Key features include:

* Objective-C programming language and runtime
* Interface Builder
* Building advanced mobile user interfaces
* Collections
* Cocoa Touch
* Core Animation and Quartz 2D
* Model-view-controller (MVC) designs
* Developing for the iPad
* Grand Central Dispatch
* Parsing XML documents using SAX, DOM, and TouchXML
* Working with the Map Kit API
* Remote and Local Push Notification
* Blocks (closures) in Objective-C
* Building advanced location-based applications
* Developing database applications using the SQLite engine
* GameKit framework