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Abstract. Despite the widespread usage of mobile devices there is a lack of environments able to allow end users to create applications directly in such devices. In this paper, we present the Puzzle framework, which supports a visual environment for opportunistically creating mobile applications in touchbased mobile phones. The user interface is designed to be usable for mobile users that do not use programming languages in their daily work as well as to motivate end users to playfully experiment and create applications. In particular, we report on its user interface, framework and evaluation.

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Abstract-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.

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