KälteApp is a free Android application developed by Fonds Soziales Wien. It falls under the category of Social & Communication and aims to provide support to homeless people in Vienna during the winter months, from November to April.

The app allows users to easily request social work for homeless individuals they come across on the streets. By indicating the number of people, their gender, and whether there are any children present, users help the street social work team prepare for the meeting. Users can also mark the location of the person(s) on a map and provide additional information to assist the social workers in finding them quickly.

Furthermore, users are asked to provide an assessment of the person's condition and any belongings they may have. This helps the social work team prepare and provide urgently needed items, such as winter clothing.

It is important to note that the KälteApp does not provide emergency assistance. In case of an emergency, users are advised to call the emergency services.

For users who wish to be contacted by the street social work team for any follow-up questions, there is an option to provide their telephone number and email address.

Overall, KälteApp is a valuable tool for anyone in Vienna who wants to make a difference in the lives of homeless individuals during the cold winter months. It is operated by the Vienna Social Fund (FSW), an organization that plans, arranges, and promotes social services on behalf of the City of Vienna.