A web-based approach for designing and deploying flexible learning tools.In : Current Trends in Web Engineering: ICWE 2013 International Workshops ComposableWeb, QWE, MDWE, DMSSW, EMotions, CSE, SSN, and PhD Symposium, Aalborg, Denmark, July 8-12, 2013. Revised Selected Papers (pp. 320-324 Abstract. This paper presents the current work in the development of a web-based approach to offer an authoring-tool for the creation of mobile applications with data collection purposes. The web-based solution additionally offers the possibility to visualize previously collected data in the web-browser. An idea of a mobile web application is presented that uses a diversity of sensors of a mobile device for collecting environmental data in the field. This paper describes how to integrate such an approach in the context of the LETS GO [1] research project. It also identifies and addresses current issues in end-user programming and mobile cross-platform development.