The application was developed in open source and provides for customization of the visit, both in terms of features for accessibility and the route to be followed.

In addition, the use of interactive and customizable elements integrated with gamification techniques helps to increase visitor engagement by making the museum experience more engaging and learning more effective. The XAll application was developed using the Inclusive Design approach to ensure equal access to culture for all people.

To design an app based on people's real needs, research, and observations were conducted with users and associations involved in all three partner museums.

In addition, the development of the app involved defining ad hoc paths, with specific stops, in each museum. So, for each stop, the following were identified: front-end functionalities, thus related to the user experience and usability of the app, i.e., its interaction with the User Interface of the app, with a focus on accessibility and inclusion; and back-end functionalities, i.e., related to the development and programming to ensure the optimal execution of the identified functionalities.