The app I’m working on currently (for multiplication tables practice) has a number type keypad and display a bit like a calculator - but for entering the answers. It’s been quite fun to think through all the little problems to make it work how you’d expect, so I was quite interested to watch an iOS Academy video where Afraz Siddiqui builds a partially finished SwiftUI version of the iOS Calculator app.

A YouTube channel worth subscribing to is Afraz Siddiqui’s iOS Academy. He does a great videos on iOS development. My favouriets might be the shorter focussed ones, like this one on the new SwiftUI chart views.