Crittercism has undertaken a series of monitoring of mobile apps over a period of time and come to the conclusion that iOS apps crash more than Android apps. This may surprise some people who presume the closed nature of iOS to result in a much more stable mobile environment for the user.
From Forbes- “One of the reasons for app crashes is the proliferation of mobile operating systems on iOS and Android. As Apple and Google have released more new operating systems, each with multiple updates, app developers face more operating systems to test apps on. In data that mobile app monitoring startup Crittercism compiled for app crashes between December 1 and 15, there were at least 23 different iOS operating systems on which apps had crashed and 33 Android operating systems on which apps had crashed. (See the graphs above.) Note that the graphs that separate out Android and iOS show these number of operating systems and the graph that combines both iOS and Android shows less–22 iOS and 17 Android.”