Maestro Mateo - Museo is an Android app developed by Sotronic Innovation Technology that serves as an audioguide for visitors to the Cathedral Museum and the Pórtico de la Gloria in Santiago de Compostela. The app is free to download but can only be accessed by visitors who have purchased an entry ticket to the museum and the Pórtico de la Gloria. Upon entering, visitors will receive a code called "localizador" that they can enter into the app to unlock the content.

The app provides a guided audio tour of the Palacio de Gelmírez, Espacio Maestro Mateo, and the Pórtico de la Gloria, complete with historical information and images of each space. The app is available in Spanish, Galician, and English.