Smartphone launched by Apple in 2007. The basic premise was to combine into one three previously separate products: a mobile phone, Apple's own iPod, and a device for e-mail communication and Web browsing.
The iPhone replaced the keypads seen on most smartphones of the time by touch screen technology, with sensors to detect multiple touches. The iPhone 3G, introduced in 2008, was accompanied by the launch of Apple's App Store, to distribute both Apple and third-party applications that run under its operating system, iOS. Although Apple did not invent the mobile phone ‘app’, the ease with which a user could buy and install them did much to increase the popularity of the technology.