Complex RPN Calculator

This app is great! I have been using this app for years as a clean and simple, RPN scientific calculator. I was surprised to see the recent update to SwiftUI. On one hand, the update adds some great functionality, like the ability to turn the click sound from the key press off, maculate how the numbers are displayed, and let's you see the stack. On the other hand, SwiftUI is just downright fugly. There's no other way to say it. It really stinks. That isn't this developer's fault, it's Apple's. What makes it ugly is that there's too much border, or white space, around the buttons. IT's true for every other app I've seen migrated to SwiftUI. They all get ugly and harder to use.

The calculator keyboard responds very slowly with this update. I can type 4-5 numbers before the first number appears. Very annoying and difficult to see if one has made a mistake on entry until a few seconds later. I am using an iPhone 14 Pro Max.

The design is clean and it’s RPN. It would be nice if it showed the stack but that’s my only quibble.