RTTG App is the official application of the Resort Trust Group. It provides access to the group's exclusive services, such as booking memberships to hotels like Exicube Bay Court Club, Sun Members, and Hotel Trusty. The app also enables users to book golf courses and purchase cosmetics, supplements, and accessories through its online store.

Moreover, RTTG App allows users to earn and use points for various purposes, such as booking hotels, using medical facilities (like High Medic), and purchasing products from stores and online shops (such as Munoaage, Switzerland Perfection, and supplements). This app is available for free and is categorized under the Lifestyle section in the Google Play Store.

The app requires a membership registration process to access its services, including booking accommodations and golf courses and using RTTG points. New members can register directly through the app, while existing members must provide their membership number to log in to their member-only page. RTTG App also provides the latest information on exclusive deals and events for its users.