# My RPN Calc

> RPN scientific and financial calculator with complex number support. (iPhone/iPad app by Laurent Rodier.)

- Source: https://appshunter.io/ios/app/my-rpn-calc/id807032892 (this page in markdown: same URL + `.md`)
- Developer: [Laurent Rodier](https://appshunter.io/developer/697920086)
- Category: Utilities, Productivity
- Price: $1.99
- Rating: 3.00/5 from 2 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 2 MB
- Languages: American English
- Released: 2014-01-31
- Data updated: 2026-07-31
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/my-rpn-calc/id807032892/reviews.md

## What is My RPN Calc?

My RPN Calc is a versatile RPN calculator with a clean and minimalist interface for iOS. It is a scientific and financial calculator inspired by the Hewlett-Packard HP-10C series pocket calculators of the 80s, most notably the HP 12C and HP 15C models. It features classical 4 operations, logarithms, trigonometry, statistics, financial, and macros for easy programming. It also features complete support for complex numbers along with 2nd, 3rd, and 4th degree equations solving, numerical root finder and integration.

Though it is not a complete emulation of the HP-1xC, it can easily substitute them for all classical, scientific, statistical, and financial operations. 

Exhaustive user manual with many practical examples is available on the home site of the application.

Summary of the main functions:
- RPN input
- Arithmetic functions (+, -, x, /, 1/x, +/-, etc)
- Trigonometry, logarithms, hyperbolic trigonometry
- Percentages (+, -, variation, total)
- Dates
- Complete complex numbers support
- Gaussian integers
- 2nd, 3rd, and 4th grade equations solving
- Macros for simple programming tasks
- Root finder for general purpose functions
- Numerical integration
- Conversions (temperature, distance, ...)
- Constants (universal, math, ...)
- Intégration with BaseCalc for radix conversions

Summary of the main statistical functions:
- 1- and 2-variable statistics
- Sums (Σx, Σx2, Σy, Σy2, Σxy)
- Mean, weighted mean, standard deviation
- Linear regression
- Correlation coefficient
- Linear estimation

Summary of the financial functions:
- Simple and compound interests
- Cash flow analysis (NPV, IRR)
- Depreciation (SL, DB, SOYD)

Latest Apple Watch support allows standard operations (classical arithmetic, trigonometric, and logarithmic function) to be executed straight from your wrist:
- RPN input
- Arithmetic functions (+, -, x, /, 1/x, +/-, %, etc)
- Trigonometry, logarithms

## Key features

- RPN input
- Complex number support
- Equation solving (2nd-4th degree)
- Numerical root finder and integration
- Statistical functions
- Financial functions
- Apple Watch support

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/my-rpn-calc/id807032892/reviews.md

### 5/5 — Parfait

*2025-01-02*

Je l’utilise depuis le début est c’est une très bonne calculatrice.

### 5/5 — Better than HP15/12C

*2021-04-09, version 4.3*

Perfect on iphone.

### 1/5 — Not useful in Apple Watch

*2021-01-06, version 4.3*

I bought this app to use on my Apple Watch. It looks good online, but you have to scroll around to access the +, -, and enter buttons. It’s not really functional on the watch in a practical manner. If it were reformatted so that all the buttons are accessible without having to scroll around then it has great promise.

## Frequently asked questions about My RPN Calc

### What is My RPN Calc?

My RPN Calc is a scientific and financial calculator for iOS that uses Reverse Polish Notation (RPN) input. It offers a wide array of functions inspired by classic Hewlett-Packard calculators.

### What kind of calculations can My RPN Calc perform?

It handles basic arithmetic, trigonometry, logarithms, complex numbers, equation solving (up to 4th degree), numerical integration, statistical analysis, and financial calculations like NPV and IRR.

### Does My RPN Calc support Apple Watch?

Yes, My RPN Calc offers Apple Watch support, allowing you to perform standard arithmetic, trigonometric, and logarithmic functions directly from your wrist.

### How much does My RPN Calc cost?

My RPN Calc is a paid application, available for $1.99. There are no in-app purchases or subscriptions.

### Is My RPN Calc suitable for programming?

While not a full emulator, My RPN Calc includes macros for simple programming tasks, making it useful for repetitive calculations.

### What devices is My RPN Calc compatible with?

My RPN Calc is available for iPhone, iPad, and Apple Watch, running on iOS devices.

### How often is My RPN Calc updated?

The latest version, 5.10, was released on March 12, 2023. Updates typically include new features and improvements.

### Does My RPN Calc have ads?

No, My RPN Calc does not contain advertisements. It is a paid application with no ads.

## Version history (last 5 releases)

### 5.10 — 2023-03-12

- UI tweaks.

### 5.0 — 2023-02-05

- Horizontal layout.
- Slide Over and Split View.
- Support iOS 16.
- Fixes

### 4.4 — 2021-11-27

- iPhone 13 Pro Max
- iOS 15

### 4.3 — 2020-02-23

1) New UI default theme.
2) Minor UI fixes.

### 4.2 — 2019-02-14

- FIX conjugate and argument functions
- Apple Watch screen options
- iPhone Xs, Xs Max, Xr compatibility
- iPad 11" compatibility 
- Apple Watch 4 support
- iOS 12 and watchOS 5 support

## Apps similar to My RPN Calc

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [My RPN Calculator](https://appshunter.io/ios/app/my-rpn-calculator/id1451441996) | — | $4.99 | Utilities |
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## More apps by Laurent Rodier

- [Prairial](https://appshunter.io/ios/app/prairial/id697920083)
- [Polyhedra 3D](https://appshunter.io/ios/app/polyhedra-3d/id741648895)
- [BaseCalc](https://appshunter.io/ios/app/basecalc/id791106163)
- [Numerals 123](https://appshunter.io/ios/app/numerals-123/id966689313)
- [ITU Morse Codes](https://appshunter.io/ios/app/itu-morse-codes/id1150640591)

All apps by Laurent Rodier: https://appshunter.io/developer/697920086

## Related topics

[laurent rodier](https://appshunter.io/ios/topics/laurent-rodier)

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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 2026-07-31.*