CovidPass offered the ability to add EU Digital Covid Vaccination Certificates as a pass into wallet apps. CovidPass accomplished this without sending personal data to a server and instead only used a hashed representation for the signing step. After CovidPass was used over 6 million times across the EU and translated into 11 languages, it was discontinued in June 2022 since iOS introduced a native way of adding EU Digital Covid Certificates to the wallet: Add verifiable COVID-19 vaccination information to Apple Wallet and Health....

June 2021 - June 2022 · Marvin Sextro, Sören Busse, Hauke Tönjes


DuelRun is an app for the Apple Watch, which lets you run with your friends, no matter where they are. It is currently in open beta.

August 2020 - February 2022 · Marvin Sextro, Max Zöch