There is an app for Disney Cruise that is completely different from the apps for the parks. Prior to the cruise, it provides general information about your ship and cruise. When your booking window opens (75 days prior to sailing for first-time guests) you'll be able to use the app to reserve shore excursions, adult dining, alcohol tastings, spa treatments, and other onboard activities that require reservations. You can also use the app to online check-in beginning 30 days before your cruise. Both activity booking and online check-in can also be completed on the DCL website. Accessing the app before the cruise requires a Disney login, which can be the same one used for other Disney sites.
Once you are in range of ship WiFi in the terminal and onboard the ship, the app changes completely to show specific information about what's happening on your cruise, including daily activities. All passengers who have installed the app can log in using their room number, name, and birthdate even if they don't have a Disney account. For kids, there may be an additional parental approval step. The app allows passengers to text each other while onboard without buying an internet package.
Once you are in range of ship WiFi in the terminal and onboard the ship, the app changes completely to show specific information about what's happening on your cruise, including daily activities. All passengers who have installed the app can log in using their room number, name, and birthdate even if they don't have a Disney account. For kids, there may be an additional parental approval step. The app allows passengers to text each other while onboard without buying an internet package.