# Touch RPN calc — Financial/Sci RPN calculator

> RPN calculator with financial, scientific, and programming functions. (iPhone/iPad app by Elvis Pfutzenreuter.)

- Source: https://appshunter.io/ios/app/touch-rpn-calc/id946171077 (this page in markdown: same URL + `.md`)
- Developer: [Elvis Pfutzenreuter](https://appshunter.io/developer/463497848)
- Category: Finance, Productivity
- Price: Free with in-app purchases
- Rating: 3.40/5 from 208 App Store ratings · 210 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 30 MB
- Languages: American English, Brazilian Portuguese
- Released: 2014-12-07
- Data updated: 2026-08-29
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/touch-rpn-calc/id946171077/reviews.md

## What is Touch RPN calc?

Touch RPN is an RPN financial and scientific calculator that implements most features of the industry-standard HP-12C, including programming functions.

It also implements a scientific RPN flavor that implements most functions of the beloved 11C. And even more flavors (10C-like, 16C-like) can be purchased within the app.

## Key features

- RPN financial calculator
- RPN scientific calculator
- Programming functions
- HP-12C emulation
- HP-11C emulation
- Expandable calculator flavors

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Financial Premium | $6.99 | one-time |
| Scientific Premium | $3.99 | one-time |
| Scientific Basic | $2.99 | one-time |
| Scientific Advanced | $4.99 | one-time |
| Computer programmer | $3.99 | one-time |
| Financial Advanced | $6.99 | one-time |
| Financial Black-Scholes | $4.99 | one-time |
| Touch 11i app transfer | Free | one-time |
| Touch Fin app transfer | Free | one-time |
| Touch 15i app transfer | Free | one-time |


## What do users think of Touch RPN calc?

Overall sentiment: positive

**Pros**

- 🚀 Excellent HP calculator emulation
- 👍 Looks and works like the real thing
- 👍 Portrait and landscape modes
- 👍 Paid version is ad-free
- 👍 Great RPN calculator

**Cons**

- 🐛 Ads in free version
- 🐛 Ads appearing in paid version
- 🐛 Incorrect calculations
- 🐛 Landscape mode issues
- 🐛 Inability to clear memory

**Commonly reported bugs**

- Stopped working after iOS upgrade
- Landscape mode not functioning properly
- Ads appearing in paid version

**Most requested features**

- Paste feature
- Option to switch between RPN and algebraic modes
- Ability to see stack contents instead of ads in paid version

## Recent user reviews (10 of 210)

All indexed reviews: https://appshunter.io/ios/app/touch-rpn-calc/id946171077/reviews.md

### 5/5 — Espetacular

*2026-07-31*

Esta calculadora é excelente. Eu a uso há anos, sempre sendo mantida e melhorada pelo desenvolvedor. Nunca tive um problema sequer. Uso no meu iPhone e no meu MacBook. Estão de parabéns! Obrigado!

### 1/5 — Display Vertical

*2026-07-21*

Não aceita visor horizontal no mesmo formato da calculadora física. Ficou horrível não girar.

**Developer response:** Olá

Para usar a calculadora no modo horizontal clique na tecla ON na esquerda da tela, clique em Mais no canto superior esquerdo e escolha o modo de sua preferência: Retrato ou Paisagem, forçando a calculadora a ficar em tal posição. Oferecemos também o modo Auto (Abreviação de Automatico) para mudar de Layout quando rotacionar seu aparelho.

Caso esteja usando o modo Auto, certifique-se que seu dispositívo não esteja "trancado" em modo Vertical. Assim, impossibilita a rotação automática da calculadora.

### 5/5 — O MELHOR APP

*2026-07-04*

Nota 10

### 5/5 — Excelente

*2026-05-24*

Muito obrigado por proporcionar isso de maneira gratuita!

### 1/5 — Atualização nova muito ruim mudou todo display já não é mais hp12c

*2026-05-04*

Atualização nova muito ruim mudou todo display já não é mais hp12c

**Developer response:** Desculpe, mas não entendemos sua reclamação, poderia nos fornecer mais detalhes?

Entre em contato via o email a seguir: stendec@stendec.io

### 1/5 — Ads a’plenty

*2026-04-26, version 7.11*

Now featuring full screen ads.  Why bother with calculator nonsense when you can bask in full bore unbridled advertising hypersaturation!

### 3/5 — iPhone rendering change?

*2026-04-04, version 7.00*

I’ve enjoyed this app for several years. Recently I’ve noticed an appearance change on my iPhone. The display and keyboard seems stretched in a vertical direction. Was a change made?

### 5/5 — Sensacional, pena que só podemos dar 5 estrelas!

*2026-04-02*

Sensacional, pena que só podemos dar 5 estrelas!

### 5/5 — Última Atualização

*2026-03-12*

A última atualização ficou muito legal, porém no iPhone mudou algo que considerava a parte mais bacana do app “o tamanho das teclas”! Ficou muito pequeno! Fica a sugestão para voltarem ao tamanho da versão anterior que era perfeito!

**Developer response:** Olá, a alteração visou adaptar-se a iPad e aos futuros telefones cuja proporção de tela tende a ser muito mais alta que larga (19:9, 21:9) em que a solução anterior não seria mais adequada.

Sugerimos entrar nas Configurações (tecla ON, depois botão direito superior) e ajustar o slider "Esticar para preencher tela" para atingir um equilíbrio entre uso da área da tela e espaçamento entre teclas. 

Mais informações em https://stendec.io/ctb/touchios/settings_pt.html

### 1/5 — Péssimo.

*2026-02-06*

Fiz a compra única para ter a versão sem propagandas e ao trocar de celular faz bastante tempo estou sendo obrigada a ver propagandas desde então e os desenvolvedores não fazem nada sobre isso!

**Developer response:** Olá, você pode restaurar compras (desde que feitas com o mesmo Apple ID) seguindo as instruções da página a seguir: https://stendec.io/ctb/touchios/purchase_pt.html

## Frequently asked questions about Touch RPN calc

### What kind of calculator is this?

This app is a Reverse Polish Notation (RPN) calculator. It offers both financial and scientific calculation modes, designed to emulate popular industry-standard models like the HP-12C and HP-11C.

### Does it have programming features?

Yes, it implements programming functions similar to the HP-12C. This allows users to create and run custom programs directly on the calculator.

### Are there additional features available?

Yes, additional calculator flavors, such as those resembling the 10C and 16C models, can be purchased within the app. This expands the app's functionality to cater to a wider range of user preferences.

### What is the cost of this calculator app?

The app is free to download and use with its core financial and scientific RPN functions. Additional calculator flavors are available for purchase through in-app purchases.

### Who would benefit from using this app?

This app is ideal for students, professionals, and hobbyists who prefer or require the RPN input method for complex financial, scientific, or programming tasks. It's particularly suited for users familiar with HP calculators.

## Version history (last 5 releases)

### 7.21 — 2026-07-30

Fix position of fast swap buttons when LCD top band is reduced size

### 7.20 — 2026-06-22

- Settings: add option to change ON button to original appearance
- Settings: add option to change height of top band / LCD in landscape orientation
- Fixes in Scientific Advanced (thanks to F. Vincent)
- Fixes in Financial and Scientific (thanks to C. Nunes)

### 7.11 — 2026-04-21

- Button ON changed to Menu ("hamburger") icon, to better express what it does
- Load/Save/Share memory operations added to the top of Settings pane (Menu button)
- .15c files from Torsten Manz simulator are now accepted
- Both stretch and distortion of the interface can be changed at Settings
- Fix in Scientific Advanced program typing (sequences like f LBL f A accepted as f LBL A)
- Scientific Advanced: increased register count to 254
- Fix bug in 7.10 related to stretch and distortion

### 7.10 — 2026-04-15

- Button ON changed to Menu ("hamburger") icon, to better express what it does
- Load/Save/Share memory operations added to the top of Settings pane (Menu button)
- .15c files from Torsten Manz simulator are now accepted
- Both stretch and distortion of the interface can be changed at Settings
- Fix in Scientific Advanced program typing (sequences like f LBL f A accepted as f LBL A)
- Scientific Advanced: increased register count to 254

### 7.00 — 2026-03-12

- Changes in interface rendering. Better adapted to iPad and Mac
- New visual feedback by key animation
- Paste in number (long press right side of LCD)
- Changes in gestures: copy = short press right side of LCD, show backside = short press left side of LCD, open color editor = long press left side of LCD
- Up to 4 fast flavor swap buttons can be configured
- Fix in how R/S is handled in INTEG and SOLVE subroutines. (Thanks W. Huysegoms)
- Color Editor, all interface colors can now be changed. Open via Settings or by long press at left side of LCD.


More info at https://stendec.io/blog/touchrpn2026_en.html

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## More apps by Elvis Pfutzenreuter

- [Photo Friend exposure and DoF](https://appshunter.io/ios/app/photo-friend-exposure-and-dof/id1198327295)

All apps by Elvis Pfutzenreuter: https://appshunter.io/developer/463497848

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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 2026-08-29.*