SANSSOUCI app serves as a digital guide to the castles and parks of the Prussian Palaces and Gardens Foundation in Berlin-Brandenburg. It offers guided tours, additional images, audio, and video content showcasing Charlottenburg Palace in Berlin and the Cecilienhof and New Chambers of Sanssouci in Potsdam. The app also provides insight into Sanssouci Park, a UNESCO World Heritage site in Potsdam.

Schloss Charlottenburg, with its Old Palace and New Wing, is the largest and most significant palace complex of the former Brandenburg electors, Prussian kings, and German emperors in Berlin. It features rooms, halls, and art collections that reflect the history and grandeur of the Hohenzollern dynasty. The app also includes transcripts for all audio content.