154K reviews
Content rating
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About this app

The Robert Koch Institute (RKI) – in its capacity as the central federal institution for public health and as the German national public health institute – publishes the Corona-Warn-App on behalf of the German government. The app serves as a digital complement to distancing, hygiene and wearing masks. Additionally, it provides a functionality to add your digital vaccination certificates to prove your vaccination status. It uses Bluetooth technology and the Google Exposure Notification APIs. The app is designed to help break infection chains by informing you if you were recently close to someone who subsequently tested positive for corona. However, at no time does it collect any personal information. Who you are and where you are remain secret – and your privacy is well-protected.


Exposure logging is the core of the app and should always be active. When enabled, smartphones exchange encrypted random IDs with other devices using Bluetooth.

The random IDs only provide information about the duration and distance of an encounter. No one is able to identify the person behind these IDs. The Corona-Warn-App does not collect any information about the location of the encounter or that of its users.

Based on maximum corona incubation times, the random IDs your smartphone collects are stored in an exposure log for 14 days and then deleted. If a person is diagnosed with corona and chooses to share his/her own smartphone’s random IDs, all persons previously encountered will then be notified anonymously.

No one will know when, where or with whom the exposure event took place. The infected person remains anonymous.

In addition to the exposure notifications, affected users will receive clear recommendations for action. Important: Information about the notified persons is not accessible at any time.


The Corona-Warn-App is designed to be your daily companion, without knowing your identity. This is why the app cannot tell anyone who you are. Data protection is fully guaranteed throughout the app’s entire service life.

- No registration required: No email address and no name need to be submitted.

- No personal information is transmitted: When you encounter another person using the app, your smartphones only exchange random IDs. They measure the time and distance of an encounter, but do not allow to identify persons or find out locations.

- Decentralized storage: Data is stored only on the smartphone itself and deleted after 14 days.

- No third-party access: Neither the person reporting a proven corona infection, nor those who have been notified can be traced – not by the German government, the Robert Koch Institute, any other user, nor by Google.

This app is not intended for any use outside of Germany. Corona-Warn-App is the main corona app for Germany, where it is interconnected with the national health care system. Despite of the above, Corona-Warn-App is also available in this country. It is provided for anyone living, working, vacationing, or visiting Germany regularly or for an extended period of time.

The terms of use for the Corona-Warn-App apply: By installing and using this app, you accept these terms of use.
Updated on
Sep 26, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Health and fitness
This app may collect these data types
Location, Personal info and 3 others
Data is encrypted in transit
You can request that data be deleted
154K reviews
Johannes Nützel
July 8, 2022
working perfectly fine. Low energy consumption, high data protection standards, easily creating barcodes for events, certificate section also working as it should. Thus, with this app, you also won't be needing the CovPass app - so if you prefer an all-in-one, this might be your way to go. Update: Bug in newest release - I'm constantly getting the same notification leading me to my vaccination certificate despite a lack of any changes.
33 people found this review helpful
Robert Koch-Institut
July 8, 2022
Thank you very much for your comment. We are in the process of analyzing the error and a hotfix is already being worked on. To support this, please provide us with the following information: What type of certificates (vaccination/genuine/test certificates) have you scanned in your app? Please email to
Kristina Finland
September 22, 2022
My Covid certificate "expired" yesterday. My 3rd vaccination was 1 year ago. Currently there are no rules for a 4th vaccination to maintain the vaccinated status. It's also currently not possible to get a 4th vaccine. I'll get it as soon as I'm eligible for the updated vaccines. In the meanwhile my Covid app shows an expired & not valid certificate only. Can you please fix this? People who got their 3rd vaccine early now have a problem. Once restrictions will come back it will be a huge problem.
1 person found this review helpful
Suse S
July 7, 2022
Unfortunately it's a big hassle to enter a positive PCR test. It seems the test comes without the so called ETAN that is needed to enter it into the app. So you have to call a call center and wait very very long to talk to an operative. This is not trivial if you're sick and all you want to do is let others know that they were close to me when I was very infectious. And i want to tell them as soon as possible. So why did the test result not come with a qr code or ETAN?
4 people found this review helpful
Robert Koch-Institut
July 7, 2022
The TAN procedure only applies if you haven't received your positive PCR test result via the app. This must be done by phone to verify your identity and test result. Otherwise, misuse and false positive reports cannot be ruled out. We will forward your criticism to the parties involved and thereby try to improve the service on the hotline.

What's new

This update includes bug fixes and provides the following new functions:

The app can display whether you are required to wear a mask in your federal state in certain locations. It's not displayed until your federal state decides on extended rules for compulsory wearing of masks. A negative rapid test or PCR test exempts you from this mask requirement for 24 hours. Depending on the state, you may also exempt from wearing a mask due to vaccinations or recovery no longer than 3 months ago.