Dashboard

Corona-Warn-App (CWA): Key performance indicators

Last update of the data: . As of May 1, 2023, current key performance indicators will no longer be provided.
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Downloads

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Test results provided

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Sharing behaviour

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Warnings received by data donors

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Downloads

Downloads

Count of Corona-Warn-App downloads from the Google Play Store (Android) and Apple App Store (iOS) as well as the total count of Corona-Warn-App downloads from both app stores (total).

Time intervals

Daily: Count accurate to the day
Weekly: Weekly count by calendar week (CW)
7-day moving average: 7-day moving average accurate to the day
Cumulative: Cumulative sum accurate to the day, since the beginning of the measurement

Reference date

The reference date here is the day of download according to German time.

Data sources

Apple App Store
Google Play Store

Additional information

The download count only contains the Corona-Warn-App downloads from the official Google and Apple app stores.

It is not possible to draw any conclusions regarding the count of active users from the download count.

Test results provided

Test results provided: Total

Count of PCR test results and antigen rapid test results provided by laboratories and rapid test sites on the Corona-Warn-App server, as well as the sum of test results of both test types.

Provided test results: PCR tests

Count of positive, negative and invalid as well as the sum of all PCR test results provided by laboratories and rapid test sites on the Corona-Warn-App server.

Provided test results: Rapid antigen tests

Count of positive, negative and invalid as well as the sum of all rapid antigen test results provided by laboratories and rapid test sites on the Corona-Warn-App server.

Time intervals

Daily: Count accurate to the day
Weekly: Weekly count by calendar week (CW)
7-day moving average: 7-day moving average accurate to the day
Cumulative: Cumulative sum accurate to the day, since the beginning of the measurement

Reference date

The reference date is the day of the test submission to the test server.

Data sources

Corona-Warn-App backend

Events

DateEvent
21.04.2023The test infrastructure has been shut down. The Corona-Warn-App no longer transmits PCR test and rapid test results or EU digital test certificates.
01.03.2023The entitlement to free COVID-19 tests has expired. For more information, see this FAQ by the German Federal Ministry of Health (only available in German)
25.04.2022Over the weekend of Apr. 23-24, 2022, a technical problem with a certificate prevented a large number of laboratories from submitting PCR tests.
07.04.2022Due to a data correction made retroactively for the period since August 2021, significantly fewer PCR tests are counted than previously.

Sharing behaviour

Sharing behaviour: Total

Count of positive test results, for which a QR code was registered or a teleTAN requested for validation or shared without TAN validation, as well as their distribution by QR code registration, teleTAN recieving and warnings without TAN.

Sharing behaviour: QR codes

Count of positive test results, validated through QR code registration, shared and not shared in the Corona-Warn-App.

Sharing behaviour: teleTANs

Count of positive test results, for which a teleTAN was requested for validation, shared and not shared in the Corona-Warn-App.
In the initial days of collection (August 25-31, 2020), totals were collected that are not stratified by "Shared" and "Not Shared". This results in a persistent discrepancy in the cumulative numbers between the total strats and the total number.
On January 31, 2023, the service of the TAN hotline was discontinued and a validation of positive test results via teleTAN is no longer possible since then. As a result, no more data points exist as of this date.

Sharing behaviour: Warning without TAN

Number of positive test results that were shared without TAN validation, stratified by self-test and third-party test registered or not registered in the CWA (e.g., performed or taken at a testing site).

Time intervals

Daily: Count accurate to the day
Weekly: Weekly count by calendar week (CW)
7-day moving average: 7-day moving average accurate to the day
Cumulative: Cumulative sum accurate to the day, since the beginning of the measurement

Reference date

The reference date is the day of test registration (QR code) or of the call to the verification hotline (teleTAN) or sharing a positive test result without TAN validation (warn without TAN).

Data sources

Corona-Warn-App backend; Stratification of the warning without TAN according to the information of the person providing the warning.

Events

DateEvent
01.03.2023The entitlement to free COVID-19 tests has expired. For more information, see this FAQ by the German Federal Ministry of Health (only available in German)
18.01.2023Version 3.0 of the Corona-Warn-App has been released. This version henceforth made it possible for users to warn other users without a TAN procedure.

Retrospective adjustment of the data on sharing behaviour

The data on sharing behaviour (total, QR codes and teleTANs) is adjusted retrospectively for the last 14 days because the reference date refers to the scan date (QR code) or call date (teleTAN). The delay may occur as follows:
The user takes more time to share his or her test result. As soon as the result is shared, the number of shared results changes accordingly regarding the scan or call date.
The user already receives a QR code when making their appointment and scans it immediately, although he or she may not have the test performed until later.

Additional information

Only positive test results are relevant for ending chains of infection. To prevent abuse, positive test results must be verified. There are two options for verifying test results: a QR code or a teleTAN, which must be entered in the Corona-Warn-App. The user receives the QR code when the sample for the test is collected. By scanning the QR code, the test can be registered in the Corona-Warn-App. As soon as the result is available, it is automatically retrieved and displayed on the smartphone. The user can then decide to release her/his own random codes from the last 14 days to warn possible risk contacts. If no QR code is available or if it is lost, the user can call the verification hotline. A teleTAN is generated there to verify the positive test result. This teleTAN must be entered into the app by the user.
Since version 3.0 of the Corona-Warn-App from February 18, 2023, it is possible to warn others due to an unvalidated positive PCR or rapid antigen test (incl. self-testing). Calling the verification hotline to assign teleTANs after a positive test result that was not submitted to the CWA is no longer necessary since that date. The verification hotline was still available until January 31, 2023 to ensure a transition period for those who had not yet updated the CWA to version 3.0.

Warnings received by data donors

Warnings received by data donors

Count of red and green risk warnings as well as the sum of both risk warnings received by data donors in the Corona-Warn-App.

Time intervals

Daily: Count accurate to the day
Weekly: Weekly count by calendar week (CW)
7-day moving average: 7-day moving average accurate to the day
Cumulative: Cumulative sum accurate to the day, since the beginning of the measurement

Reference date

The reference date is the “submitted_at” date of the PPA dataset.

Data sources

Privacy preserving analytics (PPA)

Events

DateEvent
01.03.2023The entitlement to free COVID-19 tests has expired. For more information, see this FAQ by the German Federal Ministry of Health (only available in German)
18.01.2023Version 3.0 of the Corona-Warn-App has been released. This version henceforth made it possible for users to warn other users without a TAN procedure.

Additional information

Users of the Corona-Warn-App have the opportunity to participate in the data donation and make an important contribution to improve the app. By voluntarily sharing selected data, users can help the Robert Koch Institute to evaluate the effectiveness of the Corona-Warn-App and improve the features and usability of the app. To be a data donor, the switch in the settings under "Share data" must be set to "On".

Users who have had a brief and/or distant encounter with a person who was tested positive for corona in the past 14 days, receive a green risk warning. This means that the encounter was assumed not to be above the defined threshold value. There is no need for specific action from the users concerned.

Users who have had long and/or close encounters with at least one person who tested positive for corona in the past 14 days, receive a red risk warning. This means that the encounter was assumed to be above the defined threshold. Affected users are asked to reduce personal contacts. In case of symptoms, they should consult a general practitioner, the medical on-call service, or the local health department. The general practitioner or the local health department will decide whether a test will be provided.

Update of the data

As of May 1, 2023, current key performance indicators will no longer be provided. The CWA dashboard data was usually updated daily at 10:30 AM (CET) for the previous day. Data regarding downloads was updated only on working days. On Mondays, the data for Friday, Saturday and Sunday were updated.

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