# RPN-Calc

> RPN-Calc (iPhone/iPad app by Steven Davies.)

- Source: https://appshunter.io/ios/app/rpn-calc/id6464329997 (this page in markdown: same URL + `.md`)
- Developer: [Steven Davies](https://appshunter.io/developer/1705785558)
- Category: Utilities
- Price: $4.99
- Age rating: 4+
- Requires: iOS 16.6 · 1 MB
- Languages: American English
- Released: 2023-09-06
- Data updated: 2026-08-02
- User reviews in markdown: https://appshunter.io/ios/app/rpn-calc/id6464329997/reviews.md

## What is RPN?

The basic four function calculator displays numbers in fixed format.

The scientific calculator has 75 built-in functions covering logarithms, powers, roots, trigonometric, date, time, memory operations, statistics, and probabilities and up to four user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats.

The user configurable calculator has sixteen user configurable function buttons that can each be assigned two functions from 75 built-in functions and access an unlimited number of user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats.

The programmer’s calculator has a hexadecimal keypad and displays numbers in user configurable hexadecimal format. It has four basic mathematics, six bitwise, and two shift functions.

All calculators share an operation history display for ease of reviewing computations and extensive in-app help documentation. Numbers can be copied to and pasted from the clipboard for ease of use with other applications.


## Version history (last 4 releases)

### 1.2.2 — 2025-06-05

Added help for keyboard shortcuts, improved layout for tab and function help on iPad, fixed bug related to format when opening app in basic or programmer tab, increased number of hexadecimal digits displayed in programmer calculator display, and fixed overflow bug in programmer calculator.

### 1.2.1 — 2024-05-01

Improved interface for editing macros.

### 1.1.1 — 2023-10-03

This version adds a programmer's calculator with hexadecimal keypad and display.

### 1.0.1 — 2023-09-06

No release notes.

## Apps similar to RPN

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [\|RPN\| Scientific Calculator](https://appshunter.io/ios/app/rpn-scientific-calculator/id1069467997) | 2.3 (3) | $0.99 | Utilities |
| [BVCalc](https://appshunter.io/ios/app/bvcalc/id6560108221) | — | $4.99 | Utilities |
| [My RPN Calculator](https://appshunter.io/ios/app/my-rpn-calculator/id1451441996) | — | $4.99 | Utilities |
| [Calx: Stack calculator](https://appshunter.io/ios/app/calx-stack-calculator/id928929230) | 5.0 (2) | $0.99 | Utilities |
| [RPN Calculus](https://appshunter.io/ios/app/rpn-calculus/id374359458) | 4.0 (1) | $1.99 | Utilities |
| [Codex Calc](https://appshunter.io/ios/app/codex-calc/id505057155) | 4.0 (1) | $0.99 | Utilities |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-02.*