iOS 7 is the seventh major version of Apple's mobile operating system, iOS. It replaced the last major version, iOS 6. The new version was announced at the company's Worldwide Developers Conference (WWDC) on June 10, 2013, and it was released on September 18, 2013. iOS 7 includes a new, redesigned look and has a number of changes. The latest update (or minor version), iOS 7.1.2, was released on June 30, 2014.