The application Colmar City Pass allows its user to view the list of partner sites Colmar City Pass even without an internet connection, and for each of them to obtain detailed information: Name, Photo (s), description, mailing address , location on the map, timetables, website link, phone, contact, related events, service providers around. Thus he has an interactive digital tourist guide to accompany him during his stay in Colmar. The application periodically polls the server for updates when internet access is available and its user allows the use of mobile data. If the user authorizes its geolocation, the application indicates to him the tourist sites nearby and the guide towards these sites If the user has a Colmar City Pass he can register it in the application by entering his unique number on eight digits. He then has access to information about his Colmar City Pass: date of validity, place of purchase, QRcode, list of available services and consumption status (subject to synchronization with the server). Once the application is associated with a pass, the user can use his application as Colmar City Pass dematerialized.