It is well known that auto Insurance Companies (ICs) use driving related data collected by continuously tracking the drivers’ behaviors to determine and adjust the auto premiums defining the Personalized Car Insurances. It is also well known that the majority of traffic incidents is due to human factors, especially to aggressive driving. However, the rules of Personalized Car Insurances, the evaluation model according to which auto premiums are calculated as well as the process through which the drivers’ behavior is detected by the ICs, are unknown. In this work, recognizing the importance of monitoring the drivers’ behavior and considering the necessity to overcome the limits of the actual Personalized Car insurances, a system based on a Blockchain solution and a Mobile App solution is proposed.