What's New

- Updated for iOS 7
- New "flat" icon to match iOS 7's design language

App Description

RPN Calculator 48 is a polished RPN replacement for Apple's built-in calculator:


- Starts quickly
- Large buttons
- Easy-to-read display
- Same scientific functionality as Apple's calculator
- 100 entry stack (4 to 7 visible)
- 6 memory buttons (A-F)
- 50+ levels of undo/redo
- Saves state on exit

** Use swipe gestures to undo/redo operations!! **


The ergonomics (screen and keyboard layout) of RPN Calc. 48 were inspired by HP's outstanding 48-series calculator.

RPN Calc. 48 is made by the developer of tChess (the critically acclaimed iPhone chess game) and Learn Chess (the Apple Staff Favorite e-book).

iPhone Screenshots

(click to enlarge)

RPN Calculator 48 screenshot 1 RPN Calculator 48 screenshot 2 RPN Calculator 48 screenshot 3 RPN Calculator 48 screenshot 4

App Changes

  • December 09, 2011 New version 1.0.2
  • October 10, 2012 New version 1.0.3
  • December 12, 2013 New version 1.0.4

Other Apps From Tom Kerrigan

t Chess Pro Chess - Learn Chess PopGroup t Chess Lite Fast Fractal PopGroup Lite Word Social Word Social Free Watch Tracker Blackjack X