Muzeum Broni Pancernej (the Armoured Weapons Museum) in Poznań is a branch of the Polish Army Museum in Warsaw. Its collection, assembled since the 1960s, has been displayed since 2019 in a new home near Ławica Airport, covering almost 6,000 m². Among its several dozen vehicles is the world's only complete, running Sturmgeschütz IV self-propelled gun. We prepared a mobile app for Android and iOS phones that works as an audio guide to the museum. The recordings lead visitors through the exhibition and tell the story of the tanks, armoured personnel carriers and other vehicles. The audio guide is available in Polish and English, as well as in a version with audio description for blind and partially sighted visitors.