The document discusses the growth of the mobile app industry in recent years. It notes that the app market is dominated by Apple, which holds 62% of the market share. The value of the mobile app market has grown exponentially from $1.2 billion in 2009 to an estimated $8.4 billion in 2015. The document also examines usage trends, finding that in 2010-2011, the most popular app categories were social networking, games, news, and entertainment. Overall, the summary highlights how the mobile app industry has seen insane growth in the last decade and become a multi-billion dollar market dominated by Apple and its App Store.