IoT applications are usually built on top of proprietary platforms that collect data from IoT devices. Further, some applications have been developed that use similar data coming from various sources. Thereby needing to deal with issues like interoperability and heterogene-ity in the data. A solution is to add another layer (a platform in a middle that addresses above-mentioned issues) and then build applications that use data made available via such platforms. As a proof of concept, we present our application EnMonitor that is built on top of one such platform called FIESTA-IoT platform. The application provides citizens with an understanding of the environment they live in with both local and global surrounding view.