Ecoobd2 is very easy to use:
plug ecoobd2 into obd2 connector of your car. And turn the ignition on for 30 seconds. And turn the engine on.
Ecoobd2 settings are optional and the best for your car. Even the parameters are different for each vehicle, there might not be a need to make an additional adjustment. Ecoobd2 will recognize your vehicle and your driving habits after around 200 km/150 miles driving, and then ecoobd2 adjusts itself to match your car perfectly.
Works on the basis of changing the signal form ecu. As a consequence, it changes the whole injection map.