Ceferino is a free Android app developed by GLOBAL VISUM S.A. that allows users to check the balance of their prepaid cards associated with Ceferino companies. The app can be used through the NFC sensor available in several phone models or by entering the DNI associated with the card. Additionally, users can access bus schedules to any destination of these companies, find out the delay of the buses currently in service and locate them on a satellite map. To use the app, users need a WiFi connection or a data plan.

The app's interface is simple and user-friendly. Users can easily navigate through the different features of the app, and the information is displayed accurately and clearly. Overall, Ceferino is a useful app for those who use the services of Ceferino companies, and it provides a convenient way to check their card balance and access bus schedules at their fingertips.