About this appThe Robert Koch Institute (RKI) – in its capacity as the central federal institution for public health and as the German national public health institute – publishes the Corona-Warn-App on behalf of the German government.Development of the Corona-Warn-App will be discontinued as of June 1, 2023. You will still be able to access the certificates you have already saved in the app, as well as your contact journal.The other functions will no longer be available.How the app worksDevelopment of the Corona-Warn-App will be discontinued as of June 1, 2023. You will still be able to access the certificates you have already saved in the app, as well as your contact journal.The other functions will no longer be available.