# RPN Calculator 48

> RPN Scientific Calculator

Canonical page: [https://chrome-stats.com/d/id336580727](https://chrome-stats.com/d/id336580727)

## Overview

- **ID:** `id336580727`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Tom Kerrigan
- **Category:** Utilities
- **Rating:** 4.80 / 5 (244 ratings)
- **Version:** 1.0.8
- **Last updated:** 2025-02-04
- **First published:** 2009-10-30
- **Size:** 1.18 MB
- **Data as of:** 2026-09-25
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/rpn-calculator-48/id336580727)
- **Website:** [http://www.roamingtrek.com/rpncalc48/](http://www.roamingtrek.com/rpncalc48/)
- **Privacy policy:** [http://www.roamingtrek.com/rpncalc48/privacy.php](http://www.roamingtrek.com/rpncalc48/privacy.php)

## Description

RPN Calculator 48 delivers a polished Reverse Polish Notation calculator experience as a Chrome extension. It mirrors scientific functionality, provides a 100-entry stack, six memory banks (A-F), and intuitive swipe gestures to undo and redo actions. The interface features large buttons and a clear display for quick, accurate calculations.

Based on HP's 48-series ergonomics, this extension emphasizes speed, reliability, and seamless state retention. It is built by the developer known for tChess and Learn Chess, bringing proven usability to your browser.

## Rankings

- #95,677 — Overall

## Review summary

Reviews consistently praise RPN Calculator 48 as a faithful HP 48/HP RPN emulation on iOS, with a fast, clean, ad-free interface. It’s described as reliable, easy to use, and a go-to tool for engineers and students who rely on RPN. Users value the nostalgic feel and the robust stack, plus strong value for the price and broad iOS compatibility. A few note it doesn't replicate every HP-48 feature (graphing, full programming) and some would like extras like haptic feedback or a scrolling stack.

### Pros

- Faithful HP 48/HP RPN emulation with a real stack, providing nostalgia for users who loved the classic calculators.
- Fast, clean, no-frills interface that’s reliable, easy to use, and free of ads.
- Strong value for the price; well maintained and compatible across iOS releases.
- Portable go-to calculator for engineering work, great for quick calculations on the go.
- Intuitive layout and sizable buttons that remind users of the classic HP experience.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id336580727)