155K reviews
Content rating
USK: All ages
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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
Oct 28, 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

Ratings and reviews

155K 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.
37 people found this review helpful
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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
Alexander Siegler
November 20, 2022
App works great. I already got a couple of warnings. The interface is well designed and structured. My only issue is that there is no way to find the time of the risk warning. Maybe this is a privacy setting, but it would help us to asses the situation. Like wether i got at the test center or at home from neighbors through walls.
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Manuel Eisenschink
June 29, 2020
Works great, but... It really should expose some information about what it does. You can't really be sure if it really works and knowing that my device had Bluetooth issues now and then, it would be better to see its working by some statistics or a simple counter (tokens collected). Plus side is that it really doesn't affect battery at all. No difference to before installation.
114 people found this review helpful
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What's new

This update provides a bugfix.

What was new in version 2.28:

A new tile “Pandemieradar” has been added to the Corona-Warn-App. From the tile, you can navigate to a website run by the Robert Koch Institute that displays several different statistics about the corona pandemic. The figures are updated every business day. Note that the data used for opening the website is taken from your data plan, that the website is not accessibility compliant, and that it is only available in German.