Beautiful and so well-designed
This app is so well-made and so well thought-through. It is an enjoyment to use. Power users are well supported with RPN, stack, memories, function libraries, and conversions. It is a suitable replacement of an semi-powerful HP calculator. The layout is made so that novices can start using it immediately and slowly grow into the more advanced functions as need be. Details in the design like swipe-stack-right for undo makes the app second nature to use. I would never had guessed that a calculator would become one of my favourite apps, but it is.
Fruits to go about
PCalc, v2.7