For special applications that have not been implemented in the vehicle tracking device yet, the device is unusually fast and easy to program. All you need is a standard PC that can be simultaneously used as a simulator for all functions such as GSM, GPS, SMS, I/Os, phone calls, etc.
Complicated, time-consuming, user-specific application test preparations are unnecessary if the program can run on your PC simulator, then it runs in the vehicle tracking device VTU as well. A program editor, with syntax-sensitive color representation and amongst others a powerful compiler are at your disposal for programming purposes.