# Calc-50

> High-precision scientific RPN graphing calculator with advanced mathematical functions. (iPhone/iPad app by David Smith.)

- Source: https://appshunter.io/ios/app/calc-50/id1193016704 (this page in markdown: same URL + `.md`)
- Developer: [David Smith](https://appshunter.io/developer/1193016703)
- Category: Productivity, Education
- Price: Free (on sale, was $1.99)
- Rating: 3.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 38 MB
- Languages: American English
- Released: 2017-01-14
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/calc-50/id1193016704/reviews.md

## What is Calc?

Calc-50 is a high-precision scientific graphing RPN calculator.  It carries over 50 digits of accuracy and has a large number of mathematical functions, including trig and hyperbolic functions and their inverses, and math special functions such as gamma, beta, psi, exponential integral, sine, cosine, and log integrals, Bessel functions, and more.  It is programmable, with functions that take user functions and find derivatives, integrals, function max/min, and roots.  Calc-50 also provides complex arithmetic and elementary functions.

## Key features

- High-precision calculations (50+ digits)
- Extensive mathematical functions
- Programmable features
- Complex arithmetic
- Graphing capabilities
- Derivative and integral calculation

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/calc-50/id1193016704/reviews.md

### 1/5 — Disappointed (for now), but hopeful...

*2020-07-20, version 1.4*

There was a minimal description for this app, but I was eager to try it out. Some surprises:

1) Holy hell, this is RPN. Jeez.

2) It’s impossible to copy the answer string. This seriously limits this tool’s usefulness. I’m forced to transcribe the answer into/onto something else. Ideally this should be a copyable field.

To the developer...

::: If you’ve already invested the effort to provide fifty digits of precision, I’m guessing that you have robust ‘arbitrary precision’ internals. Please open up the possibility for much higher precision output. Long meaningful/coherent digit strings are useful, even though they may seem like overkill to many people.

I am very happy that you’ve created this app. Nobody else has done this so cleanly. So, I thank you for that.

Thank you!

### 5/5 — Fantastic Calculator! Lots of Powerful Functions

*2017-05-11, version 1.0*

This calculator is far more advanced than I expected for such a low price. It has deep and highly technical capabilities, as well as graphing, 50-digit display and lots of rich functions. Also, the help button is quite useful for quick explanation of each function. 

Highly recommended!

## Frequently asked questions about Calc

### What is Calc-50's accuracy?

Calc-50 provides high-precision calculations with over 50 digits of accuracy, ensuring reliable results for complex mathematical operations.

### What types of mathematical functions does Calc-50 support?

It supports a wide array of functions including trigonometric, hyperbolic, Bessel functions, gamma, beta, and psi functions, along with their inverses and integrals.

### Can Calc-50 perform programmable calculations?

Yes, Calc-50 is programmable and can find derivatives, integrals, function maximums/minimums, and roots based on user-defined functions.

### Does Calc-50 handle complex numbers?

Yes, Calc-50 provides full support for complex arithmetic and elementary functions, making it suitable for advanced mathematical tasks.

### What devices is Calc-50 available on?

Calc-50 is available on iPhone, iPad, and iPod devices, offering its advanced calculation capabilities across Apple's mobile ecosystem.

### How often is Calc-50 updated?

The latest version, 1.8.1, was last updated on December 25, 2025, indicating a recent update. Specific update frequency is not detailed, but it appears to be actively maintained.

### What is the user sentiment for Calc-50?

Based on the provided rating, Calc-50 has an average of 3.0 stars from 2 ratings. This suggests a mixed reception from its current user base.

### Does Calc-50 have ads?

No, Calc-50 does not contain advertisements, providing an uninterrupted user experience.

## Version history (last 5 releases)

### 1.8.1 — 2025-12-25

Some speed improvements

### 1.8 — 2025-02-18

Copy and paste keys can import or export numbers or function definitions to or from other apps.

### 1.7 — 2025-01-10

Some speed improvements, and better exception handling.

### 1.6 — 2021-10-24

Minor improvements to the plot function.

### 1.5 — 2020-11-09

Fix key display issue with iOS Dark Mode.

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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 2026-06-11.*