# Graycode

> Converts numbers between decimal, hex, binary, and Gray code with animated Hanoi Tower demo. (iPhone/iPad app by Duo Pisceses, Inc..)

- Source: https://appshunter.io/ios/app/graycode/id548428653 (this page in markdown: same URL + `.md`)
- Developer: [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063)
- Category: Utilities, Education
- Price: $2.99
- Rating: 3.00/5 from 2 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 2 MB
- Languages: American English
- Released: 2012-08-09
- Data updated: 2026-08-26
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/graycode/id548428653/reviews.md

## What is Graycode?

This app is used to convert numbers among decimal, hex, binary and gray code.  If a user changes any one of these numbers, the other ones will change accordingly.  It is a handy calculator for engineers to obtain the binary or gray code values from a decimal, or vise versa.
In addition, an animated solution of a Hanoi Tower with three disks is also demonstrated based on the input number.

## Key features

- Decimal, hex, binary, Gray code conversion
- Real-time updates
- Handy calculator for engineers
- Animated Tower of Hanoi solution
- Supports iPhone, iPad, iPod

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/graycode/id548428653/reviews.md

### 1/5 — Junk

*2026-02-03*

Does not work on iOS 26, don’t waste your money.

### 5/5 — An essential for those Gray code conversion needs.

*2015-04-26*

So, you are working on a project with an incredibly tight deadline, and are confronted with a seemingly impenetrable Gray code bearing encoder.  You fill your mind full of ones and zeroes which just don't seem to make any kind of sense.

This app does exactly what it is designed to do, to convert to and from Gray code.  That impenetrable binary stream now becomes a decimal, something understandable by a human being.

### 5/5 — Fly fishing

*2015-03-07*

This new Version fixed an annoying bug in the older version. A useful tool for students and professionals to convert numbers to gray codes.

### 1/5 — Was great

*2014-01-07*

Now won't work plus ads since update.

### 5/5 — Very useful apps

*2013-01-13*

Very handy gray code calculator !

### 5/5 — Handy tool for programmers

*2012-10-24*

Handy carry-on conversion tool.

## Frequently asked questions about Graycode

### What number bases does Graycode support?

Graycode supports conversions between decimal, hexadecimal, binary, and Gray code number systems. This allows users to easily translate values between these common formats.

### How does Graycode handle updates?

Graycode was last updated on March 2, 2025, indicating active development and support. The latest version is 5.0.

### Is Graycode available on Android?

Based on the provided data, Graycode is designed for Apple devices, specifically supporting iPhone, iPad, and iPod. Android compatibility is not mentioned.

### What is the price of Graycode?

Graycode is a paid application, priced at $2.99. This one-time purchase grants access to all its conversion and visualization features.

### What is the age rating for Graycode?

Graycode has an age rating of 4+, making it suitable for a wide range of users, including children and adults.

### Does Graycode have ads?

No, Graycode does not contain advertisements. As a paid application, users can expect an ad-free experience.

### What is the animated solution in Graycode?

Graycode includes an animated demonstration of the Tower of Hanoi puzzle with three disks, based on the input number. This feature provides a visual representation of a classic algorithmic problem.

### How accurate is Graycode's conversion?

The app is designed for precise number base conversions. When a user changes a number in one format, the others update instantly and accurately.

## Version history (last 5 releases)

### 5.0 — 2025-03-02

1. Compiled with the latest iOS version.
2. Made miscellaneous improvement.

### 4.0 — 2024-02-07

Built for new iOS release.

### 3.4 — 2020-10-11

1.  Rebuilt with the latest Xcode and iOS.
2. Made some miscellaneous improvement.

### 3.3 — 2019-12-11

Built for new iOS release.

### 3.2 — 2018-01-16

Re-designed a new app icon.

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## More apps by Duo Pisceses, Inc.

- [iMathGenius](https://appshunter.io/ios/app/imathgenius/id521504939)
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- [iMathGenius Middle School](https://appshunter.io/ios/app/imathgenius-middle-school/id667604331)
- [iMathGenius High School](https://appshunter.io/ios/app/imathgenius-high-school/id682911583)

All apps by Duo Pisceses, Inc.: https://appshunter.io/developer/850707063

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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 2026-08-26.*