The Digital Twin application is dynamic and displays an up-to-date replica of real buildings. The application is suitable to be used already in the design phase of the project and will exist with it during the entire life cycle of the building. It is not just a set of 3D models as in BIM (Building Information Modelling). Digital twins take the concept of BIM, take it further and represent a much more advanced technology that now shows the future of construction and architecture and other fields. Digital twins can also use sensors, Internet of Things (IoT) technologies, artificial intelligence (AI), virtual and augmented reality. The application also includes Indoor navigation - it is an indoor navigation application for centers, airports, resorts, universities, hospitals and amusement parks. Indoor navigation helps you find stores, routes and indoor spaces in real time. 360° Panorama - displays a real environment such as Streetview or indoor environment.