This document discusses the growth of mobile devices and opportunities for apps. It notes that there are now over 5 billion mobile phone users worldwide, with iPhone, iPod and iPad users spending 30+ minutes per day in apps on average. Tablet computers are a rapidly growing segment, with the iPad currently dominating the market, comprising 84% of tablet sales and having a 91% customer satisfaction rate. The document argues that 50 million tablets will be sold in 2011, and explores potential business models for digital content, advertising, sponsorships, paywalls and games on tablets.