The Pass Nantes application by Otipass is designed for travelers seeking a comprehensive guide to explore the city of Nantes. This free app allows users to access a list of partner sites associated with the Pass Nantes, even without an internet connection. Each site provides detailed information including name, photos, descriptions, addresses, Google Maps location, opening hours, website links, phone numbers, contacts, related events, and nearby service providers, effectively serving as an interactive digital tourist guide.

Additionally, the app regularly updates its information when internet access is available and permitted by the user. With geolocation features enabled, users can discover nearby tourist attractions and receive navigation assistance via Google Maps API. For those with a Pass Nantes, the app facilitates the entry of a unique eight-digit number to access specific details about the pass, such as validity dates, purchase locations, QR codes, available services, and consumption status, contingent upon server synchronization.