Vehicular display system

A vehicular display system (100) includes a mobile device (28) having a mobile display part (74), and a vehicle on-board unit (26) which is previously fixed in the vehicle (10). An application of the mobile device (28) is booted up by a boot-up signal produced by setting the mobile device (28) in the vehicle (10). Preferably, the application receives vehicle information (80) (e.g., a vehicle speed (81)) collected in the vehicle (10) from the vehicle on-board unit (26), and displays the vehicle information (80) on the mobile display part (74).