But shouldn't it be customizable
Well, as programmers say, "Sure, I can do that! Programming is only typing!"
Is there a way to customize the main screen to do this?
I'm assuming the "main screen" you are talking about is the window labeled "WeatherCat" in the image you link to. If it's a different one please explain. As far as I know and as the dev I think implies, this window is hard-coded into the app. He can/could change what's in there and or make it larger. But we must remember that there are always consequences to changing the code for any app. So he has the final say about when or if he has the time or even the inclination to do that. He already has several requests for other changes, some of which are not trivial and have been asked for by several people.
While it might be nice to have an app look exactly the way we might want, with all the data we want displayed on any particular window, very few supply that kind of interface. There are always choices made when designing the windows an app displays. Many of those choices are concerned with
pleasing the greatest number of users versus showing the greatest amount of data. As Mr. Lincoln said, "You can please
some of the people,
some of the time. You can please
a few of the people
all the time. But you can't
please all the people all the time!"
One thing that is easy is to create a simple wed page showing exactly the data you want. The WC app makes the task of updating the data and uploading it to your web space trivial. Most browsers can display a page in a window while simultaneously have multiple other windows or tabs open. You can also adjust the size of that window to just about any size you want, even making it larger than your screen, assuming you don't mind scrolling... html is simply text. You write it with any
text processor, tell WC where it is, and WC does all the work from that point forward.
However, you will note that the dev has acknowledged your request. He will, no doubt, consider it, especially if he gets more requests for it. He has made many changes purely because he listens to his customers! I truly wish more companies paid as much attention to their customers!