Angry Birds (video game) featured app on the UK App Store in February 2010 and quickly reached No.1 there, it reached the No. 1 spot on the paid apps chart in the US App Store in the middle of 2010 and then stayed there for 275 days. The initial cost to develop "Angry Birds" was estimated to exceed €100,000, not including costs for the subsequent updates. For the iOS version, Rovio partnered with distributor Chillingo to publish the game to the App Store. Chillingo claimed to have participated in final game polishing, such as adding visible trajectory lines, pinch to zoom, pigs' grunts, birds'
Angry Birds playing "Angry Birds" and poking each other on Facebook". He then provides a tip for Liz to improve her score in the game. In February 2011, American journalist Jake Tapper mockingly introduced U.S. Senator Chris Coons as the "Angry Birds champion of the Senate" during the National Press Club's annual dinner. Some of the game's more notable fans include ex-Prime Minister David Cameron of the United Kingdom, who plays the iPad version of the game, and author Salman Rushdie, who claims he is "something of a master at "Angry Birds"". Basketball star Kevin Durant is an avid fan of "Angry