Business Process Modeling is an important activity in organizations that document processes currently being performed or it may represent a design of a new process that should be implemented. Process models are used to analyze processes in order to improve, implement or just register them in order to document the process for new staff which should learn how to perform them. As in software engineering, there are methodologies guiding the business process elicitation activity. Accordingly, there have been also works proposing agile and lightweight methodologies for carrying out this activity. In this paper we present a tool which was especially developed for supporting an agile business process elicitation. It is based on requirements which can be derived from the description of the agile methodologies described in the literature. Two important characteristics of this tool are mobility and collaboration. We also report about an initial testing of the tool which has shown further advantages of using mobile technology in this scenario.