The URBANFLUXES project investigates the cities’ warming by breaking down the urban energy budget and targeting the anthropogenic heat flux. For this research imagery from Earth Observation satellites are used combined with conventional meteorological measurements at street level. The resulted satellite-based approach is expected to be easily transferable to any city. With this knowledge, measures to reduce urban heat can be monitored and tested. The app provides background information about the project and its motivations, with sessions containing text, images and links. The app includes sections describing the technology and the methodology the project is based on and the result obtained. The aim is to improve the environmental awareness of citizens by exploiting the results of the project and inviting the user to play with the data with some interactions.