When it comes to innovation, the Windows Play Store narrowly beats out the Apple App Store and the Google Play Store. Microsoft's mobile app store gets points for its "fresh approach to app discovery" which is important since it is the way that users find out what is available in the store and find the apps that they want to install. This is a part of the Apple App Store that needs work, according to API Senior analyst Aapo Markkanen
Of course, many of you prefer the mobile app store belonging to your favorite OS, which is why ABI Research took on this task. Instead of using opinions, ABI used data such as revenue, download volume and trends to rank the stores.
source: ABI via eWeek