An Authoring Tool for User Generated Mobile Services José Danado 1 , Marcin Davies 2 , Paulo Ricca 1 , Anna Fensel 2 1 YDreams – YLabs Research Edifício YDreams – Madan Parque Sul P-2825-149 Caparica - Portugal {jose.danado, paulo.ricca}@ydreams.com 2 Telecommunications Research Center Vienna (FTW) Donau-City-Strasse 1 1220 Vienna - Austria {davies, fensel}@ftw.at Abstract. Imagine what kind of applications become possible when our mobile devices not only present data but provide valuable information to other users. Users become able to instantaneously create services and to publish content and knowledge on their own mobile device, which can be discovered and accessed remotely by other mobile users in a simple way. To achieve the vision of customizable and context aware user-generated mobile services, we present a mobile authoring tool for end-users to create, customize and deploy mobile services while on-the-go. This tool is designed to allow users with different levels of technical expertise to create mobile services. The paper also gives insight on the performed usability evaluations, namely user interviews and an online survey. Keywords: Mobile Service Creation, Usability Evaluation, Context Aware Knowledge Acquisition, End-User Development. 1 Introduction This work contributes to the overall goal of designing a mobile services infrastructure, supported by mobile tools, and an end-user platform to create focused, knowledge-based mobile services, called microservices. Microservices are small, sharply focused applications with their own graphical user interface, which allow users to obtain and provide information – such as opinions, recommendations, location or speed – to fellow users. Microservices are created and consumed by end- users solely through their own mobile terminals, encouraging spontaneous and inspired on-the-go creation. Microservices can be shared and downloaded to allow every end-user to become a microservice creator, provider and consumer, in one word, a “prosumer”. As an essential part of the infrastructure, the mobile authoring tool, called Service Creation Kit (SCK), allows mobile users to create new microservices and deploy them into the m:Ciudad [6] framework. As more and more microservices become available, the value of the platform increases with the growth of the user base. Users will be able