The fifth Developer Economics report presents insights from a survey of over 6,000 mobile app developers, highlighting trends in the app economy, platform preferences, and revenue models. Key findings indicate that Android and iOS are the most used platforms, with HTML5 gaining significant traction as a development technology, while developers express interest in emerging platforms like Windows 8 and Blackberry 10. The report emphasizes no dominant revenue model across platforms and highlights that developers are motivated more by personal fulfillment than financial gain.