March 5, 2012: Apple reaches a staggering milestone, with 25 billion apps downloaded from the iOS App Store. The company celebrates the occasion with a giveaway titled the "25 Billion App Countdown." The lucky 25 billionth app downloader wins an iTunes gift card worth $10,000. Apple's 25 Billion App Countdown The winner of the gift card is Chunli Fu from China. The app is Disney's Where's My Water?, a free puzzle game released the previous September. "We'd like to thank our customers and developers for helping us achieve this historic milestone of 25 billion apps downloaded," says Eddy Cue, Apple's…