Have you ever wondered how to measure the size of a window of your app?
Move the ruler, change the color, measure from the top or the bottom - everything should be done neatly!
I started to develop this app when I found there is no way to measure the size of an app during the development of my other apps.
So I decided to develop it, for my own use.
Later, I decided I should make this app in public to help other developers avoid getting stuck in the same problem!