iOS is the world’s most advanced mobile operating system, continually redefining what people can do with a mobile device. Together, the iOS SDK and Xcode IDE make it easy for developers to create revolutionary mobile apps. Derived from core OS X technologies, the amazing user experience of iOS has been streamlined to take maximum advantage of iPhone, iPad, and iPod touch hardware. Technologies shared between iOS and OS X include the OS X kernel, BSD sockets for networking, and Objective-C and C/C++ compilers for native performance.