Duopoly? Worldwide, Android's market share has increased from under 60% in 2011 to around 85% by the end of 2013. Likewise, over the same period the iOS market

Duopoly? Worldwide, Android's market share has increased from under 60% in 2011 to around 85% by the end of 2013. Likewise, over the same period the iOS market share has gone from around 20% to just over 10%, while all other platforms have dwindled down to the remaining <5%. http://www.idc.com/prodserv/smartphone-os-market-share.jsp http://www.idc.com/prodserv/smartphone-os-market-share.jsp The only sense in which this is still a duopoly is that the iOS platform, while a relatively tiny share of the total market, is still a significant share of paid apps.