The latest version of Xamarin's namesake development platform has additional support for iOS and more features for sharing code across the Apple OS, Android and Windows. Xamarin's platform lets developers use C# to create native apps for Android, iOS, Mac OS X and Windows. The most important addition in version 3 of Xamarin is Designer for iOS, which Xamarin hopes developers will embrace as an alternative to Apple's Xcode Interface Builder. The advantage is that users can stay in a single environment for the entire development process.