iOS 8 is the eighth major release of the iOS mobile operating system designed by Apple Inc. as the successor to iOS 7. It was announced at the company's Worldwide Developers Conference (WWDC) on June 2, 2014. A new app named Health and a corresponding framework named HealthKit will be available. Siri will support hands-free activation and music identification using Shazam. Voice and video messages will be automatically deleted unless the user saves them for future reference.