Mobile advertising is a rapidly growing market, expected to increase from $3.3 billion globally in 2011 to $20.6 billion by 2015. Europe will see the largest growth, estimated to increase from $569 million in 2011 to over $4 billion by 2015. Data from over 1,000 mobile programs shows m-commerce transactions grew 597% year-over-year compared to 69% for e-commerce, while m-commerce revenue increased 481% versus 35% for e-commerce. The iPad leads in mobile transactions with 40% share, followed by the iPhone at 38% and Android at 16%.