Post-mortem of the June 29th and 30th 2025 incident
According to our mission, we are committed to transparency and accountability. This post-mortem is part of that commitment, detailing the events surrounding the issue with the Yivi app on iOS on June 29th and 30th 2025.
Summary of the impact
Some iOS users of the Yivi app were unable to open their Yivi app on June 29th and 30th, 2025, due to an issue with the Universal Links feature. This issue was caused by a domain migration of irma.app, resulting traffic to be redirected from irma.app to yivi.app. iOS devices however do not support redirection for Universal Links, which led to the app being unable to open Universal Links. This issue was resolved by changing the irma.app domain back to its original server.
Users that had the Yivi app installed prior to the incident were probably not affected, as the app was still able to open. However, users who installed the app after the domain migration were unable to open it due to the Universal Links issue.