I have some apps doing better on Android, and some that do better on iPhone. Overall, iPhone does much better, but Android is gaining. Sometimes there is a bit of luck involved, and sometimes, the competition in a certain niche is significantly different between the 2 stores.

From what I've heard it's about even now, because iOS users tend to buy a larger number of apps at a higher average cost.

But probably not for long, since Android is growing at 5x the pace of the iPhone globally, and about 3x the pace of iOS in total.

Global growth probably doesn't matter as much if your app isn't hasn't been localized to all of those places. For example, growth of Android in a country where most people don't speak English isn't going to do much for an app written for an English audience.

If Android's growth is X times the iPhone's growth, and Android had a bigger "market share" a year ago (according to the article's chart), shouldn't iPhone's share be lower than Android's?