The Entscheidungsnavi is developed at the Chair of Decision Theory and Financial Services at RWTH Aachen University (EFi). In 2017, the first version of the tool was initially used only for teaching purposes in the course “Decision Theory” by Professor Rüdiger von Nitzsch. Every year more than 1,000 students from different disciplines take this course. These students train their decision-making skills using the Entscheidungsnavi. In the years that followed, a development team of several computer science students continued to develop the tool taking into consideration the extensive feedback of users. Meanwhile, the tool has become so professionalized that also universities and institutions started using the Entscheidungsnavi for teaching- and consulting purposes. As a non-profit project, the Entscheidungsnavi is freely available for every user.