Michael Troger, MSc.
Puchenau, Austria
greenpass@troger.app
The app works fully offline and all data gathered by the app stays on the device, and is not transmitted to our or any third party servers. That means we do not have access to your personal data. Following you can find more information about how data is used on your device:
The chosen PDF document is copied into the app’s storage space and is solely read out for display. The app does not sensually grasp the document’s content. I.e. for the app it makes no difference if you import a health related certificate or a bus ticket.
To enable the fullscreen display of the barcode, the document’s pages are searched visually (not textually), if there is any barcode inside. The text content of the barcode is read out by the app at runtime and solely used for creation of the fullscreen barcode. The barcode search functionality is optional and can be disabled in the app’s settings.
The document’s data does at no point leave the app and can be removed from the app storage at any time, by deleting the document with the delete functionality of the app or by uninstalling the app. Other apps have no access to the document in the app’s space.
After inserting the password for decryption, the document stays permanently (until deletion by the user) decrypted in the app’s storage. Your password is solely used for decryption and is not saved or sent anywhere.
The source code of the app is fully Open Source, which allows you to check the app’s functionality and behavior.
No, there are no ads.
No, there is no tracking.
This app optionally allows to authenticate via fingerprint sensor. Other than that the app requires no permissions at all. Therefore it has also no access to things like internet, camera, or other (not imported) files on your device, etc. The app can solely access the currently imported documents.
It is not recommended to use the app on so called rooted devices. Root access potentially allows other apps to access your otherwise safe documents.
Definition: An external link is any URL in the app, marked with the “open in new” icon next to it.
Since the app itself does not have internet access, links will be opened in your default browser. An external link can also be handled by one of your other installed apps, like e.g. for rating the app it is usually your app store. When you leave the app through such an external link, then I can not guarantee the same level of privacy as in my own app.
This policy is currently valid and was created in April, 2024. Since the app will be updated from time to time, I might also update this policy. The current policy will always be available at this URL. The policy is open-source like the rest of the app, so you can also check the history of changes.