Taxi customers tend to use their smartphone to call and manage their taxi and even store details about their favorite taxi driver. Nevertheless, they often do not have the possibility to comprehend how the taxi fare is calculated and if it is correct. In our approach, we developed a smartphone application to track the taxi ride and calculate the fare in real time. At the end of the ride, mean cost calculations for three different sources are presented to the user and the tracked data contributes for community-based fare calculation. The application was tested by experts and will be evaluated in a user study to improve the fare calculation pattern.