I remember reading this blog some time
ago from Flurry: “Mobile Apps: Models, Money and Loyalty” See: http://blog.flurry.com/bid/26376/Mobile-Apps-Models-Money-and-Loyalty
From the blog, one thing immediately noticeable is that “Games” retention has the biggest fall (after lifestyle) during the 30-60 day period as seen in the “Loyalty by Application category list”. (Though this list also includes paid games, but I can safely assume that the pattern would be similar or even amplified if we separate out free to play games)
Courtesy: http://blog.flurry.com - “Mobile Apps: Models, Money and Loyalty”