Is it necessary to create a new app? Because it seems to me that the source code of the current app its already owned by the Germans and should be made available.

You can also use the webpage and mobile app "yr.no" for free global forecasting.

To reduce costs, they don't particularly encourage use outside Norway / Nordic countries.

Last time I read the API documents, they were only in Norwegian for this purpose.

Edit: it seems this is no longer the case; at least I can't find it on the site. But my Norwegian skills are practically non-existant.

English info on the yr.no data access api is here: https://hjelp.yr.no/hc/en-us/categories/200450271-About-Yr-t...

This data is provided by the Norwegian meteorological institute: https://www.met.no/en/free-meteorological-data

There is also a private Norwegian weather provider, StormGeo: https://www.stormgeo.com/

You could also implement a cheap mirror of the data, I guess... So that is no excuse

So are they paying for the data from the US and other countries? Or relying on free data online?