It's officially a two-horse race - IDC puts Windows Phone shipments for the first quarter of 2017 at a meager 0.1%. This matches the 0.1% share of the "Others" category (most competing OSes are now discontinued, even Tizen's fate seems uncertain). Android is the ruling OS with a solid 85% market share (it seems to hover around that point). This left the other 15% to iOS, but there's a cycle - Q3 is a weak quarter, then the next-gen iPhones land in Q4 and iOS jumps several points. Period Android iOS Windows Phone Others 2016Q1 83.4% ...
Source: http://www.gsmarena.com/idc_windows_phone_falls_to_01_market_share_android_up_to_85_in_q1_this_year-news-26255.php
