Another effect that may be playing into all of this is that Android has a larger share of users who want a phone but not necessarily a smartphone. This demograp

Another effect that may be playing into all of this is that Android has a larger share of users who want a phone but not necessarily a smartphone. This demographic is less likely to buy an iPhone and more likely to opt for the cheapest thing on the shelf, which is almost invariably going to be running Android. These users basically do not exist as far as app revenue is concerned. I don't have links but I've seen reports that on average, iOS users make considerably more heavy use the "smart" features of their phones (and thus, buy and use more apps), which lines up with this. While there are "power users" who make heavy use of Android's more technical features and deep customization, they probably aren't a large enough group to make up the difference.