When I try to download https://play.google.com/store/apps/details?id=sk.nczi.covid19
from outside Slovakia (Switzerland), I get an error "this item is not available in your country".
I think this will cause a lot of problems in practice, as
- many people coming back to Slovakia will have Google Play country setting set to different country (and it is very non-trivial to change) so they will not be able to download app at the border
- people will not be able to download the app in advance.