It's not a single app. Apple and Google provided common APIs, but there isn't an Apple/Google "app". There are lots of different legal requirements, and the ap

It's not a single app. Apple and Google provided common APIs, but there isn't an Apple/Google "app". There are lots of different legal requirements, and the app points towards the local testing regime for example which is different in every country. The Apple and Google roadmap already discusses that future items include more interoperability to enable international travel, it's just not a v1 feature.