The aim of the Corona warning app is to recognize and break through SARS-CoV-2 infection chains as quickly as possible. Users should be reliably and quickly informed about encounters with infected users of the app and thus possible transmissions of the virus so that they can voluntarily isolate themselves in order to help contain the SARS-CoV-2 pandemic.
From the README:
"The German government has asked SAP and Deutsche Telekom to develop the Corona-Warn-App for Germany as open source software. Deutsche Telekom is providing the network and mobile technology and will operate and run the backend for the app in a safe, scalable and stable manner. SAP is responsible for the app development, its framework and the underlying platform. Therefore, development teams of SAP and Deutsche Telekom are contributing to this project. At the same time our commitment to open source means that we are enabling -in fact encouraging- all interested parties to contribute and become part of its developer community."
Update: the backend got published.
As a german citizen its very interesting to me, also because it is a controversial discussed topic.
What do you think of such apps?
Do you have similar projects in your countries?