It's been like this for a while. There is no standard way of measuring this stuff. There are too many different factors or ways to look at it. But the bottom line is this:
Google has their OS on more phones.... and Apple makes more money.
Everybody is doing well, though. Google chose to go down the road of giving its OS away for free to any OEM who wants it... and Google collects ad revenue. (Google is an advertising company, after all)
Apple is, and has always been, a...