I bought an android smartphone last summer. Shame on my geek attitude, I decided to do that only because I wanted to learn how to program for android phones. In fact, it’s quite simple and, fortunately for me, it was documented a lot by the google team. Since I just finished my bachelor in software engineering, I also bought a car. So I told myself: “Hey, why don’t you do a simple app so you can learn AND follow your gas consumption at the same time?”.