Do you like roller skating? 20Cones is an Android application to learn and improve your roller skating skill. It help you to learn the tricks of slalom skating modality. You will learn the basic tricks as the most advanced. The program comes with a database of main slalom tricks of several levels. Each trick is linked to some on-line demo videos. Also, you can make list of tricks for trainings, mark your favorites tricks ... And some new features and translations will coming soon