Corona-Warn-App
Corona-Warn-App is the official and open-source COVID-19 contact tracing app used for digital contact tracing in Germany made by SAP and Deutsche Telekom subsidiary T-Systems. 

It had been downloaded 22.8 million times as of 19 November 2020 and 26.2 million times as of 18 March 2021. 

The app has been promoted by billboard and broadcast advertisements, e.g. in cooperation with the German Football Association (DFB) and other prominent companies.
Q89288125
COVID-19 contact tracing app
Concept
Q103470847
digital contact tracing
Concept
Q552581
SAP
ORG
Q9396
Deutsche Telekom
ORG
Q565423
T-Systems
ORG
Q154191
German Football Association
MEDIA
Q94320705
Corona-Warn-App
MEDIA
2020-11-19T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
19 November 2020
DATE
2021-03-18T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
18 March 2021
DATE
-19^^http://www.w3.org/2001/XMLSchema#decimal
-19
NUMBER
+22.8^^http://www.w3.org/2001/XMLSchema#decimal
22.8
NUMBER
+26.2^^http://www.w3.org/2001/XMLSchema#decimal
26.2
NUMBER
instance of
developer
developer
use
subsidiary