gReact is a mobile application designed for citizens residing in the territory of the Republic of Serbia. It allows users to report environmental issues and requests for solving ecological problems present locally. Users can directly report all environmental problems to the Operational Center of the Ministry of Environmental Protection through the application. Furthermore, users can track the status of the reported issues' resolution.

The app also provides important alerts about critical weather-related and communal events that are significant for citizens' safety, property, and environmental preservation. For instance, alerts about adverse weather conditions, fires, floods, traffic accidents involving vehicles transporting hazardous materials, among others.