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Here you can find all important information about the Corona-Warn-App open source project. For further information you can also check the frequently asked questions about the Corona-Warn-App.

A positive summary after 100 days

Hanna Heine on September 23, 2020

The developers at SAP and Deutsche Telekom regard the first 100 days since the Corona-Warn-App’s launch as a success. Since its release on June 16, the app has been downloaded more than 18.3 million times. This high number of downloads compared to other European countries shows that the population is giving the app a chance and is willing to use an intelligent technology to fight the spread of the pandemic.

In this document (German only), based on the current data status, you will find further facts and figures about the Corona-Warn-App, the laboratory connection and the test results transmitted.

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Problem in connection with iOS 13.7 fixed

Hanna Heine on September 17, 2020

In close cooperation with Apple, the developers could fix the problem in Apple’s iOS 13.7 operating system that was identified a few days ago. Affected users should now receive a correctly calculated risk assessment under iOS 13.7 again. The adjustments were made directly on the server. This means that the Corona-Warn-App does not have to be updated and users do not have to do anything

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What requirements must be met in order for a personal test result to be successfully transmitted via the Corona-Warn-App?

Janina Hoerdt on September 11, 2020

In order to ensure that users receive their test results via the Corona-Warn-App, the following points are important:

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Problems with iOS 13.7

Janina Hoerdt on September 10, 2020

During the course of regular tests on the Corona warning app, developers today discovered a problem in the Apple operating system iOS 13.7, relating to the determination of the risk values. The iOS version released by Apple on September 1 may lead to confusing risk calculations for a small number of users. In some cases, the app may show some users that they were exposed to a higher risk than was actually the case.

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Corona-Warn-App Version 1.3 brings improvements and new features

Hanna Heine on September 4, 2020

We have updated the Corona-Warn-App to version 1.3, which is available for download in Apple's App Store and Google Play Store. The latest version includes a number of enhancements, such as improved texts for the risk status and test results as well as clearer messages when scanning QR codes.

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QR Code scanned but no test result in the Corona-Warn-App

Janina Hoerdt on August 25, 2020

The Corona-Warn-App has been active for a few weeks now and has been downloaded over 17.6 million times. An essential part of the app is the QR code procedure, which allows tested users to report test results to the app pseudonymously.

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Note on the study by the Irish Trinity College

Hanna Heine on August 19, 2020

Fraunhofer IIS has conducted numerous tests of the interface vis-a-vis Google and Apple (so-called exposure notification interface) and discussed the results with SAP, Deutsche Telekom and the RKI to adjust the app’s configuration.

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Corona-Warn-App version 1.2.1 available in Google Play Store

Hanna Heine on August 14, 2020

Version 1.2.1 of the Corona-Warn-App has been released in the Google Play Store. The update corrects the misleading sentence that the probability of infection is ranked as 'increased' even though the risk of infection is, in fact, low. Therefore, we recommend all Android users to install version 1.2.1 of the Corona-Warn-App.

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Upgrade to iOS 13.6.1 improves interaction with the Corona-Warn-App

Hanna Heine on August 13, 2020

We recommend iOS users to upgrade the operating system to iOS 13.6.1 as it improves interaction with the Corona-Warn-App.

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Corona-Warn-App version 1.2.1 is available in the App Store for iOS devices

Hanna Heine on August 12, 2020

Version 1.2.1 of the Corona-Warn-App has been released in the Apple App Store. The update fixes an error which caused the app to crash or prevented some users from opening the app. Therefore, we recommend all iOS-users to update the app to version 1.2.1.

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