released today, it's app. Open Source, quite similar to the German app from what I see.
Let's see if the government manages to convince enough people that it's harmless, so it gets widely adopted.

Rundown through the app, and link to the sources:

@globalc I was surprised to discover it is bilingual. (And that is was branded "Cocoa" but that doesn't appear in the item name in either app store. 😎)

@jimt Indeed, the multilingual part was very surprising.
One difference to the German app: it's simplistic. The German app can apparently also inform you how many other app users are within reach, here it was used to create graphics:

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