Apps on smartphones do all sorts of things, ranging from checking the weather, providing stock quotes, messaging friends and family, productivity, games, and so on, but have you ever wondered which category actually accounts for the most money made in an app store? Well according to the folks at Midia Research, it turns out that the gaming category actually accounts for the most. Based on their findings, it seems that mobile games account for 84.9% of app store revenue. This is based on the top 700 grossing apps from both the iTunes App Store and the Google Play Store. This hardly comes as a surprise especially since earlier this year it was revealed that mobile gaming revenue was on the rise.