Garagescanner is a collaborative platform that allows parking in private parking garages using mobile phone (without keys, controls or currencies). We provide the following advantages: • Emission reduction, by optimizing the routes required by the drivers to find a parking space. • Optimization of the time required to find a parking space, since it leads the drivers directly to an empty one. • Money-saving for drivers, enabling them to use fewer resources regarding fuel and time consumption. • Contribution to smart traffic management in public roads, decreasing the amount of vehicles in the streets. • Extra incomes for owners, as they monetize their parking lots, and for administrations, as taxes are generated.