This document discusses using Flex and ColdFusion to build mobile apps. It explains that Flash can be used for in-browser content and games on mobile via Flash Player, and can also be used to build "native" mobile apps packaged for specific devices via Adobe AIR. Flex 4.5 introduced mobile optimized UI components that are better suited for mobile with features like bigger touch-friendly components and scrolling styles. It also describes common mobile UI patterns in Flex like the ViewNavigator for switching screens and TabNavigator for tabbed views. The document shows how to connect Flex apps to ColdFusion backend services via Data Services for retrieving and testing backend data.