This paper investigates various parameters that are related with the information provided by telematics applications in public transport. The telematics applications examined are a) a web site portal that provides real time information to PT users, b) a smartphone application that utilizes the advantages of location identification and c) an interactive voice response (IVR) system. The examination was performed through a revealed and stated preference questionnaire-survey that was addressed to public transport users in the city of Thessaloniki, Greece. The parameters investigated are related with the socioeconomic background of the public transport users, their mobility patterns and attitudes as well as with stated opinions about changes that telematics applications may have on their current travel behavior. Finally, a linear multiple regression model was developed, indicating that the parameters which may have an impact on the perceived cost of these application (as a percentage of the total fare level) are related with the application itself, the age of the PT user as well as with his/her educational level.