If you follow the reports, you'll find that even though Android has the larger market share of almost 70-80%, you will find in almost every online report that the Apple App store generates way more revenue than the Android store. The problem is that 90% of that 70-80% is made up of really crappy Android phones that can't run any of the newer apps and games that are more graphically/memory demanding.


"Though Android dwarfs iOS in devices and downloads, Apple rakes in an estimated $5.1 million in revenue from the App Store each day, while Google banks just $1.1 million per day. And Citigroup analyst Mark May believes Google Play pulled in only $1.3 billion in revenue last year—just 13% of Apple's haul—even though Androidaccounts for roughly 75% of all app downloads(the App Store's share was just 18%)."

"Here are the numbers from April, which Macquarie says come from Distimo, the app download research company:
Google Play: $530 million, up 166%, market share = 38%
iOS App Store: $870 million, up 53%, market share = 62%"


Just to quote a few from this earlier year (i.e 2014 articles talking about 2013). It's obvious that if you are a developer, you want to be developing for iOS first; that's where the money is. Android may have a larger market share, but a large portion of that market share can't actually run today's apps, or are users that want a phone for what it is - simply a phone. These users don't care about apps, they buy the phone because it is a cheaper phone, they tend to be the older aging generation.


Edit: Also, note that Clash of Clans was ported to Android 1.2 years after its iOS release.