In the last period, 2014 Q4, the largest presented item is Android with Sales Amount of 279M. The fastest growing participant in our report is iOS with 95.22% growth in Sales Amount over 8 quarters between 2013 Q1 to 2014 Q4. The slowest growing topic is Android with 78.67% growth over the same period. This report represents data points consolidated from 2 sources: Gartner and IDC
Gartner
IDC