The Balkan-Med Air App is a smart application developed within the Interreg Balkan-Med Project “Fostering resource efficiency and climate change resilience through community based Air Quality Internet of Things”, co-funded by the European Union and national funds of the participating countries, European Regional Development Fund (ERDF). The App is developed for general use and provides general information on air pollution and specific air pollutants, while through pop-up tips, it engages users in the process of monitoring and more importantly reducing air pollution. The ultimate goal is to raise public awareness towards a sustainable way of living. The App visualizes the data collected by the air quality IoT sensors located in five Balkan-Mediterranean countries, Bulgaria, Greece, Cyprus, North Macedonia and Albania.