Designing and developing multimodal mobile applications is an important knowledge for researchers and industrial engineers. It is crucial to be able to rapidly develop prototypes for smartphones and tablet devices in order to test and evaluate mobile multimedia solutions, without necessarily being an expert in signal processing (image processing, objects recognition, sensors processing, etc.). This chapter proposes to follow the development process of a scientific experiment, in which a mobile application will be used to determine which modality (touch, voice, QRcode) is preferred for entering expiration dates of alimentary products. For the conception and the generation of the mobile application, the AppInventor framework is used. Benefits and limitations of this visual tool are presented across the “Pervasive Fridge” case study, and the obtained final prototype is discussed.