Very visible, very very simple - keyboard shortcuts underdeveloped

visibility very good. ability to re-size when not in full screen - very good.

Good not Excellent app due to stuff like this: tried to use keyboard “C” to clear, doesn’t work. that would be a nice keystroke to add to the app.
It would be nice if all the calculator functions had keyboard shortcuts.
Escape did not take me out of full screen. After doing Force Quit a couple of times, I finally thought of putting the cursor in the upper right. Ah, OK.
So, it requires like two or three mouse moves and clicks just to exit Full Screen. It would be nice to make exiting Full Screen easier.

Good app.

WadeCottingham about Full Screen Calculator