The BetterWeigh™ mobile towing scale takes the guesswork out of towing and hauling, by measuring the real-time, live weights of your vehicle, trailer and more. BetterWeigh™ is a towing scale for the smartphone age. Powered by TowSense™ technology and equipped with Bluetooth, it provides safer towing and easier setup, all with virtually no installation requirements. Just plug it into the vehicle diagnostic port (OBD-II).