The app's ease of use masks the complexity of the software behind it. The MyGreenCar team has created individualized physics models for each available make and model, taking into account specific factors like aerodynamic drag, rolling resistance, torque output, and tractive power. It's a gargantuan task. Every year more than 1,200 new car models are released, each with its own particularities and features. So far, the team has created individual calibrations for over 5,000 vehicles, nearly every model from 2010 to 2015.