After a back-and-forth between a large group of developers and the German government, which was difficult for uninvolved parties to understand, and after a heated public debate on centralized versus decentralized data storage, the German government decided to commission SAP and Telekom to develop the Corona-Warning-App. Fraunhofer Gesellschaft and the Helmholtz Centre CISPA are providing the development team with advice and contributing their experience from the development work of the first project. In mid-June, i.e. in the next few days, the app is to be released by the Robert Koch Institute and will be available for everyone to download.