The wind speed units were kmh but I use knots on weatherflow setup, and changed them to knots.
Everything else were correct units, deg C, and mm rain.
This phone is a Tab A 8inch, the font size in settings is at 7 out of 8 , font style is default and bold setting is on.
But this is an odd size phone. Most people use smaller phones than this. I have this size to be able to see everything bigger and clearer than normal people.
So just now I reduced my font size from 7 out of 8 down to 4 out of 8 and I could read the air pressure correctly to 1 decimal place. And when I went back to your app it automatically refreshed its sizes when I went back to it while it remained open.
And my phone is on light mode. The background changes to black when I switch to dark mode. But then grey text in this app for example is difficult to see so I use light mode generally.
And point 3. An average user would like instructions from your App explaining where to find the access key from your link. Weatherflow provide this forum for users to ask how to find their key, but that is really for those of us who understand what we are looking for. You could describe how to get the key from that link.