Mysnowmaps is a free web and app that displays convenient information in form of maps of snow depth over large areas. It uses an innovative technology mixing physical models and satellite data. Mysnowmaps is also a community of snow fans that love to experience off-piste excursions. The app allows to share data of snow depth and snow type allowing a contributed monitoring of water resources and improves the consciousness of the users about the safety of the excursions.