OBDII EX Gauge Demo is a free Android application designed for car enthusiasts who want to keep track of their car's performance. It is compatible with both gas and diesel engines and runs on Android mobile and tablet devices. However, it requires the car to be OBD-II compliant and a Bluetooth Adapter ELM327 or compatible. The app supports up to 49 different generic OBD-II sensors, which are divided into 6 groups for easy management and observation. Each sensor live data is shown in 2 formats: by analog gauge and by digits. The app also auto-detects the OBD-II protocol and displays the description of the protocol used in the car.