The Otipass Nancy application allows the user to view the list of the Nancy City Pass partner sites even without an internet connection, and for each of them to get detailed information: name, photo (s), description, address, location on the map google Maps, schedules, website link, phone, contact, related events, service providers around. So it has an interactive digital tourist guide to accompany him during his stay in Nancy. The application periodically polls the server for updates when an in