supercharged buttons&stack: new iOS App

[madstamm]

Hi Ashok, thanks for the reply and suggestion with google ads! that's a good idea, I will give it a go for sure. I used Swift, as I wanted the app to be compatible with IOS12 - and I think SwiftUI needs IOS13.

by the way, I downloaded your own RPN app, "RPN 30" - great app looks like we both considered RPN to be suitable in combination with the touchscreen. I really think its a fabulous combination!

Do you find the buttons and stack in my app to be intuitive? anything you could recommend to improve the app?