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 (video game) the top 10 for paid iPhone/iPod apps, while its iPad-exclusive "Angry Birds HD" versions were the top-selling and top-downloaded iPad apps for the year. Mattel also made a few board games based on the app. These were called "Angry Birds: Knock on Wood, Angry Birds: On Thin Ice" and "Angry Birds: Mega Smash". In February 2010, "Angry Birds" was a nominee for the "Best Casual Game" award at the 6th annual International Mobile Gaming Awards in Barcelona, Spain. In September 2010, IGN named "Angry Birds" as the fourth best iPhone game of all time. In April 2011, "Angry Birds" won