Finnish game developer Rovio said the game "Angry Birds" on Christmas Day Download the number of 8 million times, December 22-29th downloads between 30 million times. On Christmas morning, Rovio's "Angry Birds Star Wars Edition" and "Troublemaker" are ranked in the top downloads of iOS and Android app stores, thanks to the tens of millions of of people who have just received tablets and smartphone gifts eagerly looking for downloadable apps. In addition, Rovio is not the only game developer with a happy Christmas. On Christmas Day, the "Temple Escape" on the iOS and Android Systems was downloaded 2.5 million times, according to Imangi studio data. Mojang's "When a Creator" (Minecraft) sold 453,000 copies on Christmas Eve, a figure containing a Mac and PC version. Meanwhile, STORM8, a social-game developer, said its mobile games were downloaded 2 million times on Christmas Day, and that some of the hottest games ' daily active users had a 4.5% increase in average revenue. This indicates that the user is not only downloading but also buying within the application. Last week, Flurry, a market research agency, predicted that the world's iOS and Android apps would download 328 million downloads on Christmas Day. 17.4 million iOS and Android devices were activated that day, a record. Flurry also predicted that the Apple and Google platform apps downloaded 1.76 billion times in the week of Christmas. It appears that at the end of the December, not only the Angry Birds, many games have greatly increased the number of downloads. But for all these companies, especially those who download more than paid sales for free, the real challenge is how to turn the new crowd of holiday users into a stable revenue in 2013.