Freifunk-Karte is a free Android application developed by Michael Rauter. It falls under the category of Social & Communication. This app provides a comprehensive map of Freifunk communities in Germany. It utilizes the official directory.json from the Freifunk API to gather a list of communities. The app then reads the links to node maps from the API files, which include Netmon, ffmap, and OpenWifiMap. These maps display the nodes, routers, and access points of each community, which are then integrated into the Freifunk-Karte map.

The data is updated every 60 minutes to ensure accuracy. Nodes that have been offline for an extended period are not displayed on the map, while those that have been offline for less than 3 days are shown in gray. The app also includes a Heatmap Layer, developed by Alexander Wunschik from Freifunk Franken, which provides additional information about router and user distribution.

Freifunk-Karte is a valuable tool for anyone interested in the Freifunk community in Germany. It offers an easy-to-use interface and up-to-date information about the various communities and their network infrastructure.