The aim of the KNOCKER project was to assess the acceptance potential of a concept for a mobile application designed to centralise communication tools. On this occasion, three focus groups were conducted with different user profiles. The aim was to identify the typical profile of potential users, but also to spot areas for improvement of the application. Ixiade’s support allowed, on the one hand, to clarify the concept and illustrate it with relevant use cases and, on the other hand, to gather the information necessary to address design and acceptability issues. Based on all these elements, Ixiade was able to guide the project leaders in the development and valorisation strategies of the application.