@TheRadarGuy Yes. It is the correct app. But both the iPhone- and the iPad-version are exactly the same.
A friend did install the app on a prior version of the iPad Pro and he got the iPad-version.

Maybe the iPad-version of the app does not support the (new) 10.5" version of the iPad Pro?!
...and the falls back to the iPhone version?!

I've downloaded the windy.com app on my iPhone.
Afterwards I downloaded the app on my 10.5" iPad Pro and it seems to be also the iPhone-version of the app (the screens do not match the screenshots in the App Store for the iPad-version)?!
I cannot choose to download the iPad-version.

How can I install the iPad app?