# CompSci Calculator — Binary Decimal Hexidecimal

> Real-time base conversion calculator for programmers with bitwise functions. (iPhone/iPad app by Corey Smith.)

- Source: https://appshunter.io/ios/app/compsci-calculator/id1111878012 (this page in markdown: same URL + `.md`)
- Developer: [Corey Smith](https://appshunter.io/developer/1070099434)
- Category: Utilities, Education
- Price: Free
- Rating: 4.40/5 from 40 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 55 MB
- Languages: American English
- Released: 2016-05-09
- Data updated: 2026-08-28
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/compsci-calculator/id1111878012/reviews.md

## What is CompSci Calculator?

CompSci Calculator lets you calculate in three different bases: decimal, hexadecimal, and binary.

CompSci Calculator was developed for programmers, developers, computer engineers, and computer scientists. In real time you can do part of an equation in one base and then switch to another and complete the equation. As you type in any particular base the values in all three modes are displayed together. Because of the real time instant conversion between the bases CompSci Calculator also serves as an excellent conversion tool.

Features:
-basic algebra between bases
-simultaneous answers in all three bases
-selectable bit size: 8,16,24,32
-optional additional 16 bits of radix point precision
-bitwise functions
-1's and 2's complements
-shift left and shift right

Student and teacher feedback is very appreciated!

## Key features

- Decimal, hexadecimal, and binary base calculations
- Real-time simultaneous conversion
- Basic algebra between bases
- Selectable bit size (8, 16, 24, 32)
- Bitwise functions
- 1's and 2's complements

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/compsci-calculator/id1111878012/reviews.md

### 5/5 — Irritating ad’s, Difficult to ise

*2021-12-13*

How about providing a paid version with no ad’s and some sort of help since the UI is so “different”?  Deleted from my phone for just these reasons

### 1/5 — Rubbish anyway

*2021-12-12*

Full of trackers and data stealers. Don’t trust this

### 1/5 — Limited hex conversion

*2021-05-25*

The application gives an error if the hex number goes above 4 digits. That may be fine for beginners, but it is not good enough for use on an advanced or professional level. 

I do really like the three number always being shown (decimal, hex, binary)

**Developer response:** Hi,

If you change to Binary mode, you can change the overflow to 8 hexadecimal digits by clicking on the "32-bit" button. We default to 4 digits this because showing 8 hexadecimal digits by default shows a lot of lines in the binary display.

### 4/5 — Want a version without ads

*2021-03-04*

I love this app so much; I’m an embedded firmware engineer and this makes my life a lot easier. The only reason I gave 4 stars was I wish I could pay for a version without the ad at the top.

### 1/5 — The fastest I have ever deleted an app

*2021-01-05*

This is a fail.

I went to covert a 6 digit hex number into decimal and received an overflow error after 4 hex digits. 

I’d like to think that someone will still find this useful but I’m struggling to think who that might be.

**Developer response:** Hi,

If you change to Binary mode, you can change the overflow to 8 hexadecimal digits by clicking on the "32-bit" button. We default to 4 digits this because showing 8 hexadecimal digits by default shows a lot of lines in the binary display.

### 5/5 — 10+

*2019-04-16*

this application is the best, it has all the most important functions and works perfectly
(CS student)

### 5/5 — Exactly what I needed!

*2018-06-05*

Works perfectly!

### 5/5 — Very useful and well coded app

*2016-05-12*

Works great! Would recommend

## Frequently asked questions about CompSci Calculator

### What bases does CompSci Calculator support?

CompSci Calculator supports calculations and conversions in decimal, hexadecimal, and binary bases. It displays values simultaneously across all three modes as you type.

### What are the bit size options for CompSci Calculator?

CompSci Calculator offers selectable bit sizes of 8, 16, 24, and 32 bits. It also provides optional additional 16 bits of radix point precision.

### Does CompSci Calculator support bitwise operations?

Yes, CompSci Calculator includes support for bitwise functions, as well as 1's and 2's complements. This makes it a comprehensive tool for computer science tasks.

### Is CompSci Calculator free to use?

CompSci Calculator is available for free. However, it does contain advertisements to support its development and maintenance.

### What devices is CompSci Calculator compatible with?

CompSci Calculator is compatible with iPhone, iPad, and iPod devices. It is designed for Apple's mobile operating system.

### How often is CompSci Calculator updated?

The latest version of CompSci Calculator is 2.1.3, last updated on April 28, 2022. While updates are not extremely frequent, the app is maintained.

### What is the age rating for CompSci Calculator?

CompSci Calculator has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### Can I perform algebraic operations in CompSci Calculator?

Yes, CompSci Calculator allows you to perform basic algebra between different bases. You can switch between bases mid-equation to complete your calculations.

## Version history (last 5 releases)

### 2.1.3 — 2022-04-28

behind the scenes support

### 2.1.2 — 2022-04-28

behind the scenes support

### 2.1.1 — 2021-04-25

behind the scenes support

### 2.1 — 2021-04-23

iOS 13 Dark Mode Support

### 2.0.1 — 2019-09-12

various tweaks and changes

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## More apps by Corey Smith

- [Neon Times Tables](https://appshunter.io/ios/app/neon-times-tables/id1070099435)
- [Theft Tycoon](https://appshunter.io/ios/app/theft-tycoon/id1118766358)
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- [Spell Flash: Grades 1-8](https://appshunter.io/ios/app/spell-flash-grades-1-8/id1178385715)

All apps by Corey Smith: https://appshunter.io/developer/1070099434

## Related topics

[binary calculator](https://appshunter.io/ios/topics/binary-calculator)

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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 2026-08-28.*