Germany launched its official COVID-19 warning app which was now available for download to smartphones, the government announced on Tuesday.
Released by Germany's disease control agency Robert Koch Institute, the app informs citizens who had been in contact with an infected person in order to detect and break the chains of infection.
German Health Minister Jens Spahn stressed that the app was "not a panacea, not a free ride ticket, but it is an important additional tool in containing the pandemic."
Downloading and using the app was "a small step for each of us, but a big step in the fight against the pandemic," said head of the Chancellery Helge Braun, adding that citizens could rely on high standards of data protection.
The app was based on a "decentralized software architecture" which stored data on the mobile phones of users instead of a central server.