# 15C Pro Scientific Calculator — HP 15C emulator

> HP 15C scientific calculator emulator with advanced mathematical functions. (iPhone/iPad app by Vicinno Soft LLC.)

- Source: https://appshunter.io/ios/app/15c-pro-scientific-calculator/id421102285 (this page in markdown: same URL + `.md`)
- Developer: [Vicinno Soft LLC](https://appshunter.io/developer/338971050)
- Category: Utilities, Education
- Price: $5.99
- Rating: 3.80/5 from 281 App Store ratings · 171 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 10 MB
- Languages: American English, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek, Hebrew and 19 more
- Released: 2011-02-26
- Data updated: 2026-09-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/15c-pro-scientific-calculator/id421102285/reviews.md

## What is 15C Pro Scientific Calculator?

15C scientific calculator is a high-end scientific programmable calculator for iPhone and iPod touch, which behaves exactly like, and supports all functions of HP 15C Scientific Calculator. 

"15C Scientific Calculator supports complex numbers, intense calculations, matrix operations, and many other features that I don't have room to list. " -- AppGratis.com 

"This is a terrific emulation of the venerable HP-15C calculator -- the best one I've found in the App Store (and believe me, I've tried the others). Works just like the original, and it comes with a wealth of help functions -- pressing the Help button reveals the original User Manual and Advanced Functions Handbook in PDF format, as well as manuals for a number of other HP calculators. And it's always as close as your phone. " -- from app store review

"Does exactly what my HP15C does, and always with me in my pocket" -- David, Financial Analyst.

Built with identical mathematics and algorithms, it gives you same capabilities and better performance. It can perform numerical integration and solve the roots of equations in addition to supporting complex numbers and matrix calculations. 

**** Features ****

• Root finder 
• Numeric integration 
• Complex numbers 
• Matrix operations 
• Hyperbolic and inverse hyperbolic trig functions 
• Probability (combinations and permutations) 
• Factorial, % change, and absolute value 
• Random number generator 
• RPN entry 
• Programmable 
• Option to disable/enable key click feedback sound 
• Automatically save/restore settings during app close/start 
• Click menu key to see more options. 
• More ... 

**** 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

- Complex number support
- Matrix operations
- Numerical integration
- Root finder
- Programmable
- RPN entry
- Hyperbolic trig functions

## What do users think of 15C Pro Scientific Calculator?

Overall sentiment: negative

**Pros**

- 🚀 Faithful emulation of original HP-15C
- 👍 Works just like the real calculator
- 💡 Convenient to have on phone
- 🚀 Accurate calculations
- 👍 Familiar RPN interface

**Cons**

- 🐛 Crashes on iOS 13 and later
- 🐛 Orientation issues on some devices
- 🐛 Occasional locking up
- 🐛 Display issues in portrait mode
- ⚠️ No longer maintained or updated

**Commonly reported bugs**

- Crashes on launch with iOS 13+
- Displays only half the calculator in portrait mode
- Locking up when accessing the help screen

**Most requested features**

- Add haptic feedback on key presses
- Implement program storage and retrieval
- Add support for latest iOS versions

## Recent user reviews (10 of 171)

All indexed reviews: https://appshunter.io/ios/app/15c-pro-scientific-calculator/id421102285/reviews.md

### 1/5 — Not worth it

*2026-06-08, version 2.3*

Just purchased this app. It has an obnoxious clicking sound when pressing any button, and it cannot be turned off. Will be seeking refund.

### 2/5 — Used to be great, but now terribly slow

*2025-07-31, version 2.3*

Slower than 1987 real calculator, how possible

### 1/5 — Moins bien qu’une autre application

*2025-05-29*

J’avais l’application touch 11i. Bien mieux. Malheureusement d’un seul coup elle a arrêté de fonctionner. Celle application fonctionne mais pas très agréable. Impossible de la mettre verticale. De paramétrer le bruit des touches ….

### 3/5 — Not functional

*2024-10-18, version 2.3*

I have an iPhone 16. With the phone position sideways the calculator works excellent. My rotate vertical the image does not rotate. Also, there’s no access to settings as shown in the pictures. Lastly, it’s very difficult to close the app to move to something else. The normal swipe doesn’t work.

### 5/5 — Excellent App and Sci Calc

*2024-02-17, version 2.3*

This is an excellent app and HP 15C Scientific Calculator. I teach AP Calculus BC, and I use it often for my calculations. The user interface is clear and accurate, and the calculations are accurate. Highly recommended.

### 5/5 — App essentielle

*2023-11-22*

La meilleure app, simulant l’une des meilleures calculatrices scientifiques HP.
Je l’utilise au quotidien, en remplacement de ma 15C, quand je ne l’ai pas sous la main. Un très beau boulot, en tous points conforme à l’original.

### 5/5 — Great Tool

*2023-02-09, version 2.3*

Works just as good as the original. And as long as I have my phone it is with me and ready to go!

### 5/5 — Reliable through four years of use

*2022-12-27, version 2.3*

Same as college days. Reverse Polish notation is the best. If you loved the device, this app is for you.

### 5/5 — Mr. Luizon

*2022-10-08*

Outstanding

### 5/5 — Stuck in RAD?

*2022-05-30, version 2.3*

g DEG 60 COS I get -.95, the RAD answer. But RAD is not on the display. What am I doing wrong? How do I get to degrees? g DEG does not seem to work. This is my only known question on my beloved 15C app.
Thank you!!

## Frequently asked questions about 15C Pro Scientific Calculator

### What does the 15C Pro Scientific Calculator app do?

This app is a high-end scientific programmable calculator that emulates the HP 15C Scientific Calculator. It offers advanced functions such as complex numbers, matrix operations, numerical integration, and root finding, providing the same capabilities as the original hardware with improved performance.

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

Key features include support for complex numbers, matrix operations, numerical integration, and root finding. It also offers hyperbolic and inverse hyperbolic trigonometric functions, probability calculations, RPN entry, and programmability. The app includes features like automatic settings saving and optional key click feedback.

### How much does the 15C Pro Scientific Calculator app cost?

The application is a paid app, meaning you purchase it once to unlock all its features. There are no in-app purchases or advertisements mentioned, indicating a straightforward one-time purchase model.

### What devices is this calculator app compatible with?

The app is designed for iPhone and iPod touch devices. It functions as a mobile version of the HP 15C calculator, always accessible on your phone.

### Who would benefit from using this calculator app?

This app is ideal for individuals who require a powerful and versatile scientific calculator. This includes engineers, scientists, students studying STEM fields, and financial analysts who are familiar with or prefer the HP 15C's functionality and RPN input method.

## Version history (last 5 releases)

### 2.3 — 2020-04-16

Bugfix for back help page.

### 2.2 — 2020-04-15

Bugfix for iOS 9.

### 2.1 — 2020-04-13

Add missing assets.

### 2.0 — 2020-04-10

Bug fix for iOS 13.

### 1.89 — 2016-09-19

1. added auto-rotate support.
2. optimized the display font.

## Apps similar to 15C Pro Scientific Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Haseba Calculator](https://appshunter.io/ios/app/haseba-calculator/id1121281655) | 4.6 (3,795) | Free | Utilities |
| [Calculator⁼](https://appshunter.io/ios/app/calculator/id487127942) | 4.6 (358,262) | Free | Utilities |
| [Calculator #](https://appshunter.io/ios/app/calculator/id458535080) | 4.6 (35,876) | 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/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)
- [11C Scientific Calculator](https://appshunter.io/ios/app/11c-scientific-calculator/id530593018)
- [10bii+ Financial Calculator](https://appshunter.io/ios/app/10bii-plus-financial-calculator/id734187686)

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

## Related topics

[hp 15c calculator](https://appshunter.io/ios/topics/hp-15c-calculator) · [hp 15c](https://appshunter.io/ios/topics/hp-15c)

---

*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 2026-09-09.*