The number of device installs for free apps in the Google Play store is over ten times bigger than the Amazon Appstore in the United States, according to new research conducted by Distimo. The mobile app store analytics company found that the top 200 free apps in the Amazon Appstore were downloaded 16 million times throughout March 2013 in the United States. The top category was video games, spearheaded by Temple Run 2; the most downloaded free app in the store. Word4Pics: 4 Pics 1 Word by BrainVM Games followed in second, with the Kindle edition of Subway Surfers by Kiloo trailing in third. The top publisher, based on free games, was Rovio Entertainment (surprise, surprise). Movie tie-in The Croods was its most popular application throughout March, which should be expected given that it’s the studio’s latest release. Imangi Studios remains in second thanks to Temple Run 2, with Disney close behind in third.