Eco CoachEco Coach is a service within the Mercedes me app family. It can therefore be accessed on the smartphone as well as via the head unit. The app supports Mercedes-Benz customers in reducing emissions in a playful way by providing suggestions for optimized charging behavior and showing ways in which real consumption can be reduced. We develop the app’s backend and frontend for iOS and Android devices. To ensure a gripping user experience, we provide concepts as well as the UI design and regularly conduct user tests.