This application measures a G level at the time of departure and the stop of the car using a gyroscope sensor of iPhone.Depending on a measured G level, I detect sudden acceleration, sudden brake, and mark "Eco - Score" is calculated by eco-friendly driving by judging severe driving.The bud on the screen matures into big tree by "Eco - Score" depending on driving.When the bud does eco-friendly driving, I mature into big tree, but come back to the stage of the bud when I do severe driving in environment.It is application to bring up a tree by eco-friendly driving.