Between 1942 and 1944, the SS transported thousands of concentration camp prisoners from Sachsenhausen and Ravensbrück to numerous satellite camps in Berlin. The prisoners, among them many women, had to do forced labor for the SS and armaments companies: as bomb seekers, in the construction of bunkers, or in the production of fighter planes.
By the establishment of satellite camps, the concentration camp system was extended to the workbenches and front doors of many Berliners. At no other time, so many concentration camp prisoners were present in the "everyday life" of the metropolis.

Six of Berlin's 14 subcamps are exemplarily presented in the app: In the districts of Lichterfelde, Haselhorst, Schönholz, Moabit and Müggelheim, Neukölln and Schönefeld.
In addition to the history of the camps, biographies of former prisoners will also be presented. The locations of the former camps are located cartographically. In excerpts from video interviews, contemporary witnesses have their say.