I have simply no idea who thought it was a good idea to implement a nation-wide warning system on an app that has ~15k downloads[0]~. We already get warnings through cell broadcast here in Hamburg for the weather (last year we got multiple high wind warnings). I'm very disappointed.
[0] https://play.google.com/store/apps/details?id=de.materna.bbk...
Edit: As a commenter pointed out, it has 1M+ downloads. But I'm still unsure why is there is even an app, when you can use the cell broadcasted warnings, which everyone with a modern phone get, regardless whether they have an app installed.