Kalliópê is a mobile application that allows the reception of multimedia messages associated with a specific event, be it physical, digital or hybrid. The contents received, designed by the event organizer, are personalized and admit different formats: texts, images, sounds, videos, 360 videos, augmented reality ... The application allows real-time interaction with the audience, the sending and management of additional content (second screen) as well as receiving accessibility, linguistic and / or cognitive services, according to the requirements and / or preferences of each user.Kalliópê also communicates with other devices such as screens, speakers or sensors, allowing the creation of new transmedia experiences from a single platform.