1 Omniture Q1 2012 (January-March), monthly average
2 iTunes, accessed through appfigures.com, March 2010 - April 2012 and bbc.com/mobile data from Omniture Q1 2012 monthly average
3 Omniture Discover, Q1 2012 monthly average (January-March). Due to sampling rate figures are accurate to approximately 95% accuracy
4 EMS Middle East 2012