Apple reveals the Apps of 2012 WhatsApp, the cross-platform messaging app, was the best-selling iPhone app of the year, while Apple's Pages word processor was the best-selling iPad app of the year. The number one free iPhone app of the year was Google's YouTube app, released in September after Apple dropped the version of the app which came pre-installed on the iPhone until iOS 6. The top free app for the iPad was Skype, the video calling service. Apple also listed its editors' apps of the year. Paper, a notepad and sketching application, was Apple's iPad app of the year and the runner-up was Green Kitchen - a recipe app for vegetarians. The iPad game of the year was puzzle game Room, followed by real-time strategy game Eufloria. For the iPhone, Apple's editors picked Airbnb - the travel service - as app of the year, with taxi app Hailo as runner-up. Rayman Jungle Run, a platform game, was iPhone game of the year, while Super Hexagon - a tricky and visually striking game - was the runner-up. As part of its iTunes review of the year Apple named Emeli Sande as artist of the year, while Call Me Maybe by Carly Rae Jepson was song of the year.