Gmina Krzyżanowice (Krzyżanowice Municipality) in Racibórz County lies in the Oder valley, on the border with the Czech Republic. We prepared the ‘Odra dla odkrywców’ (Oder for Explorers) mobile app for Android and iOS phones – an audio guide to the most interesting places along the Oder. As part of the Polish-Czech project ‘Turysta na pograniczu’ (Tourist in the Borderland), under the Interreg V-A Czech Republic – Poland programme, we extended it with an additional module that broadens what visitors can explore in the border region. The app is available in Polish and Czech.