A prototype for EUD in touch-based mobile devices.

Widespread usage of powerful touch-based mobile devices enables the creation of tools that will allow end users to create their own mobile applications. In this paper, we introduce the Puzzle framework, which supports a visual authoring tool for opportunistically creating mobile applications in touch-based mobile phones. Puzzle focuses on users without programming experience and enables them to playfully experiment and create mobile applications. Puzzle applications can include access to web-services, native phone functions and interactive objects. In the paper, we report on its current architecture and user interface.