According to figures released [Feb 2015] by Kantar Worldpanel ComTech, iOS accounted for 47.7 percent of all smartphones sold in December 2014 in the U.S. That’s just a notch above Android’s 47.6 percent.
The larger phones helped them a lot. Of course I’ve been saying that for years… I’d expect Apple to dominate over time in the US, particularly given how amazing the latest devices have been. They might do well in Europe too, but I’m not sure.
For the rest of the world, Android will probably win due to low cost.