RPN Calculator

RPN Calculator (or RPN Scientific Calculator) is a utility for iOS developed by Purgatory Design. Its functionality was inspired by traditional HP calculators which utilized (RPN).

Display formats

 * Standard
 * Scientific
 * Engineering

Version history

 * 1.0 — January 26, 2009, requires iPhone OS 2.2.
 * 1.1 — January 7, 2015, supports iOS 8.
 * 1.1.1 — January 22, 2015
 * 1.2 — December 21, 2015
 * 1.3 — January 12, 2016, requires iOS 8.1.


 * This app can also be run on Apple M1-based Macs.