Many iPhone Apps Now Free It's a good day to go app shopping. A number of the most popular paid iPhone and iPad apps are now available for free, in what is expected to be a promotional offering before the fifth anniversary of Apple's App Store. Wednesday will be five years since the app store was launched. Barefoot World Atlas, a beautiful interactive atlas app typically priced at $4.99, is marked as free. But there're bigger savings, too. Traktor DJ, an app that's popular among DJs and allows you to mix songs, is marked as free, down from 19.99. There are games, too: The $6.99 price of "Infinity Blade II" has been cut down to zero and $0.99 games like "Tiny Wings" and "Where's My Water?" are also completely free. The free apps were first spotted by technology website The Verge. Apple hasn't responded to ABC News' questions about its motivation for giving away the apps or how long the promotions will last. But the company last week sent out a timeline of the App Store's biggest milestones in the past five years to ABC News and other media outlets. The makers of Barefoot World Atlas and Traktor DJ apps haven't responded to ABC News' request for comment. Check Out the 50 Best iPad Apps The app store was released July 10, 2008, with 500 apps. Ten million apps were downloaded in the first weekend. In May 2013, Apple announced it had seen 50 billion app downloads since launching the store. Google's Android marketplace, or Google Play Store, has been on Apple's heels with 48 billion app downloads announced in May. When Google's Play celebrated its first birthday in March, it also offered discounts on popular apps, movies, books and magazines.