# 11C Scientific Calculator — HP 11C emulator

> Accurate HP 11C RPN scientific programmable calculator emulator for iOS. (iPhone/iPad app by Vicinno Soft LLC.)

- Source: https://appshunter.io/ios/app/11c-scientific-calculator/id530593018 (this page in markdown: same URL + `.md`)
- Developer: [Vicinno Soft LLC](https://appshunter.io/developer/338971050)
- Category: Utilities, Education
- Price: $5.99
- Rating: 4.20/5 from 298 App Store ratings · 164 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 8 MB
- Languages: American English
- Released: 2012-06-04
- Data updated: 2026-09-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/11c-scientific-calculator/id530593018/reviews.md

## What is 11C Scientific Calculator?

11C Scientific Calculator is the most accurate and precise emulator of the HP 11C RPN  scientific programmable calculator available for iPhone and iPod touch. It uses the same RPN (Reverse Polish Notation) entry system and supports the same mathematical functions as the HP 11C Scientific Calculator.

**** Features ****
• Hyperbolic and inverse hyperbolic trig functions. 
• Probability (combinations and permutations).
• Factorial, absolute, integer & fractional.
• % change, and % of total.
• Random number generator.
• Index register for indirect operations.
• User mode to run program labels.
• Cumulative statistical analysis & Linear regression.
• Hour minute second conversion.
• Polar, rectangular conversion.
• RPN entry.
• Programmable.
• In-app manual, quick start help, and in-app support access.
• Option to disable/enable key click feedback sound; and
• Easily switch between US and EU data format/comma or period as decimal point
• Automatically save/restore settings during app close/start.
• Click menu key to see more options. 
• More … 

*** What People Say About It ***
"Miss your old HP 11C RPN scientific calculator? Then give this utility app a try. It mimics the look and feel of that classic number cruncher in every way possible. It uses the same Reverse Polish Notation entry system and supports the same mathematical functions. There’s even an in-app manual that features tutorial videos in case you’ve lost your touch."   ---AppAdvice.com

"This app supports complex numbers, intense calculations, matrix operations, and many other features that I don't have room to list. "   ---AppGratis.com

**** Support ****
Feel free to contact us if you need any support by visiting www.vicinno.com or simply email us at support@vicinno.com.

**** Stay tuned ****
Like us: www.facebook.com/vicinno 
Follow us: www.twitter.com/vicinno

## Key features

- RPN entry system
- Programmable functions
- Hyperbolic trig functions
- Probability calculations
- Statistical analysis
- Complex number support
- Matrix operations

## What do users think of 11C Scientific Calculator?

Overall sentiment: positive

**Pros**

- 🚀 Excellent emulation of original HP 11C calculator
- 👍 Familiar and intuitive RPN interface
- 🚀 Convenient to have calculator on phone
- 💡 Ability to program and save calculations

**Cons**

- 🐛 Occasional crashes or unresponsiveness with iOS updates
- 🔍 Small display size on some devices
- 🔍 Manual access issues

**Commonly reported bugs**

- Blank/white screen issues
- Compatibility problems with newer iOS versions

**Most requested features**

- Ability to adjust font size or display layout
- Support for additional languages/markets

## Recent user reviews (10 of 164)

All indexed reviews: https://appshunter.io/ios/app/11c-scientific-calculator/id530593018/reviews.md

### 5/5 — Like a Dream

*2026-03-17, version 1.73*

This simulation feels exactly like my 11C I bought in 1985 and that got me though Fluid Dynamics after going through 2 T_s. 
Love the 11C more than any I’ve ever used.  It still works perfectly but with mobile phones who carries a calculator any more?  
It’s such a pleasure to be able to do my calculations on this phone.

### 5/5 — Old Dependable

*2026-03-17, version 1.73*

All the convenience of my familiar old calculator, that I’ve used since high school,  without having to carry it anymore.  After 40 years of trouble free operation the old HP deserves retirement.  Emulator App works perfect on my iPhone

### 1/5 — App doesn’t work

*2025-06-09, version 1.73*

Just downloaded the app, it doesn’t work.  Whenever I open the app the screen is a blank white page. Hopefully the developer can provide some assistance.

### 5/5 — RPN is best

*2025-05-19, version 1.73*

Yes

### 5/5 — Wonderful

*2025-02-28, version 1.73*

I’ve used the 11 C all my professional life. I was delighted to find the emulator so I don’t have to lug the actual calculator around. Thank you so much for providing this great tool.

### 5/5 — Patrick

*2025-01-31, version 1.73*

Great app. I’ve used an 11C since the late 70’s and still use my original. I guess they made them too good.  This app allows me to use it whenever I have my phone

### 1/5 — Blank, White Screen

*2024-08-18, version 1.73*

I went to the menu to turn on auto rotate and when I tried to go back - Blank, White Screen Now I'm out 6 bucks - ripoff

### 5/5 — I think in reverse Polish notation

*2024-06-26, version 1.73*

What’s not to like?

### 5/5 — Coole App 😎👍🏽

*2024-06-17*

Funktioniert wie das Original, das mir fast 40 Jahre treue Dienste geleistet hat. Schön gemacht!

### 5/5 — i love this app

*2024-03-12, version 1.73*

I purchased this HP 15C calculator app becauee I've used the original HP 11C, since 26th September 1986. It is fun to use on my iPad.

## Frequently asked questions about 11C Scientific Calculator

### What does the 11C Scientific Calculator app do?

This app is an accurate emulator of the HP 11C RPN scientific programmable calculator. It replicates the original's Reverse Polish Notation (RPN) entry system and supports its extensive mathematical functions, making it suitable for complex calculations and programming.

### What are the key features of this calculator emulator?

Key features include the RPN entry system, programmability, hyperbolic and inverse hyperbolic trigonometric functions, probability calculations (combinations and permutations), factorial, absolute value, integer and fractional operations, percentage calculations, random number generation, and statistical analysis with linear regression. It also supports complex numbers and matrix operations.

### Is this app free to use?

Based on the provided information, this application is a paid app. There are no mentions of in-app purchases or advertisements, indicating a one-time purchase model.

### What kind of calculations can I perform with this app?

You can perform a wide range of scientific and engineering calculations, including advanced mathematical operations, statistical analysis, complex number calculations, and matrix operations. Its programmability allows for custom function creation, mirroring the capabilities of the original HP 11C.

### Is there a manual or help available within the app?

Yes, the app includes an in-app manual, quick start help, and access to in-app support. This ensures users can easily learn how to use the emulator and its various functions, even if they are new to RPN or the HP 11C.

## Version history (last 5 releases)

### 1.73 — 2020-04-17

Bugfix for back help page.

### 1.72 — 2020-04-15

Bugfix for iOS 9.

### 1.71 — 2020-04-13

Add missing assets.

### 1.70 — 2020-04-11

Bugfix for iOS 13.

### 1.63 — 2015-11-23

iOS 9 optimization

## Apps similar to 11C Scientific Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Haseba Calculator](https://appshunter.io/ios/app/haseba-calculator/id1121281655) | 4.6 (3,795) | Free | Utilities |
| [Calc Pro - The Top Calculator](https://appshunter.io/ios/app/calc-pro-the-top-calculator/id438580059) | 4.7 (358) | $7.99 | Utilities |
| [Calculator HD Pro Lite](https://appshunter.io/ios/app/calculator-hd-pro-lite/id571121141) | 4.6 (51,312) | Free | Utilities |
| [Calculator #](https://appshunter.io/ios/app/calculator/id458535080) | 4.6 (35,876) | Free | Utilities |
| [Calculator +](https://appshunter.io/ios/app/calculator-plus/id351815470) | 4.6 (10,020) | Free | Utilities |
| [Calculator₊](https://appshunter.io/ios/app/calculator/id398129933) | 4.7 (1,729,318) | Free | Utilities |

## More apps by Vicinno Soft LLC

- [BA Financial Calculator Pro](https://appshunter.io/ios/app/ba-financial-calculator-pro/id338971047)
- [Vicinno Financial Calculator](https://appshunter.io/ios/app/vicinno-financial-calculator/id400147868)
- [15C Pro Scientific Calculator](https://appshunter.io/ios/app/15c-pro-scientific-calculator/id421102285)
- [10bii+ Financial Calculator](https://appshunter.io/ios/app/10bii-plus-financial-calculator/id734187686)

All apps by Vicinno Soft LLC: https://appshunter.io/developer/338971050

---

*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 2026-09-10.*