HobDrive is an intelligent Trip Computer and OBD2 diagnostic software. HobDrive uses your ELM327 vehicle adapter and GPS sensor to calculate and aggregate trip information. ELM327 (Bluetooth, Wifi based) is recommended (but hobdrive can run even with GPS data only). Please try and test hobDrive Demo with your vehicle before buying full version! On any issues please inform via support or forum: http://hobdrive.com/forum/viewforum.php?f=19 Not all vehicles are ELM327 and OBD2 compatible. Please