comScore Reports 3.5% Increase In US Smartphone Marketshare For iOS, Android Declines By 1.3%7 March 2013bzamayo.com/comscore-january-2013comScore: Google Android ranked as the top smartphone platform with 52.3 percent market share, while Apple’s share increased 3.5 percentage points to 37.8 percent. BlackBerry ranked third with 5.9 percent share, followed by Microsoft (3.1 percent) and Symbian (0.5 percent). For Apple, the important battleground for iOS isn’t the US anymore.