This document discusses mobile app market trends based on data from App Annie. It summarizes App Annie's analytics products and customer base. It then analyzes trends in app downloads and revenue on the iOS App Store and Google Play from Q3 2014. Specific trends are discussed for different countries, devices, app categories, and top games and publishers globally and in Taiwan for December 2014. Key findings include Google Play leading in downloads but iOS maintaining a revenue lead, the rise of messaging apps, and top Taiwanese publishers outside of Taiwan.