# Graycode vs Converter

The clearest difference is price: Converter at Free against Graycode's $2.99. Converter also leads on update cadence (every 3 months vs every 10 months). Graycode's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Converter is free to download; Graycode costs $2.99 up front. Converter sells 1 one-off in-app purchase. Graycode asks for nothing beyond the download.

Graycode ships an update every 10 months, Converter every 3 months. The most recent releases landed on August 26, 2026 and August 18, 2026 respectively.

## The numbers

| Metric | Graycode | Converter |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/graycode/id548428653/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 2 MB | 23 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) | [CHI HOU LAM](https://appshunter.io/developer/1559222253) |

## What reviewers say

### Graycode

[App page](https://appshunter.io/ios/app/graycode/id548428653)

This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.

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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Converter

[App page](https://appshunter.io/ios/app/converter-common-units-convert/id1570015168)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Advertising | $0.99 | one-time |


## Frequently asked questions

### Is Graycode free?

Graycode costs $2.99, with no in-app purchases.

### Is Converter free?

Converter is free to download, with in-app purchases available.

### Do Graycode or Converter have ads?

Converter shows ads; Graycode does not.

### Which is updated more often, Graycode or Converter?

Graycode ships an update every 10 months, and Converter every 3 months. Most recently, Graycode was updated on August 26, 2026 and Converter on August 18, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*