Apple Watch is a smartwatch developed by Apple Inc. It incorporates fitness tracking and health-oriented capabilities as well as integration with iOS and other Apple products and services. The device is available in three “collections”: Apple Watch Sport, Apple Watch, and Apple Watch Edition. The watch is distinguished by different combinations of cases and first or third party interchangeable bands. Apple Watch relies on a wirelessly connected iPhone (5 or above)to perform many of its default functions (e.g. calling and texting). It is compatible with the iPhone 5 or later models running iOS 8.2 or later, through the use of Bluetooth or Wi-Fi. Announced by Tim Cook on September 9, 2014, the device was available for pre-order on April 10 and began shipping on April 24, 2015.