# Graycode vs Developer Calc Hex Dec Oct Bin

The clearest difference is price: Developer Calc Hex Dec Oct Bin at Free against Graycode's $2.99. Developer Calc Hex Dec Oct Bin also leads on rating (4.1 vs 3.0) and update cadence (every 5 months vs every 10 months). Graycode's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Developer Calc Hex Dec Oct Bin is free to download; Graycode costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Developer Calc Hex Dec Oct Bin holds the better App Store score, 4.1 against 3.0. That said, the two scores are not equally well evidenced: Developer Calc Hex Dec Oct Bin has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 67% of Graycode's written reviews are positive against 76% of Developer Calc Hex Dec Oct Bin's.

Graycode ships an update every 10 months, Developer Calc Hex Dec Oct Bin every 5 months. The most recent releases landed on September 25, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Graycode | Developer Calc Hex Dec Oct Bin |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/graycode/id548428653/reviews) | **[4.1 (15 ratings)](https://appshunter.io/ios/app/developer-calc-hex-dec-oct-bin/id568750126/reviews)** |
| Number of ratings | 2 | **15** |
| Positive reviews | 66.7% of reviews | **76.3% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 5 months** |
| Monetization | Paid | **Ad-supported** |
| Size | 2 MB | 4 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) | [QQ TSUBASA](https://appshunter.io/developer/568750169) |

## 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


### Developer Calc Hex Dec Oct Bin

[App page](https://appshunter.io/ios/app/developer-calc-hex-dec-oct-bin/id568750126)

This app converts numbers between binary, octal, decimal, and hexadecimal bases on a single screen. It also displays color hex codes and RGB values simultaneously. It's designed for developers needing quick base conversions and color code referencing.

**Highlights:** Binary, octal, decimal, hexadecimal conversion, Color hex code and RGB display, Large 19-digit decimal display, Conversion reset toggle, Maximum and minimum value display

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Graycode free?

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

### Is Developer Calc Hex Dec Oct Bin free?

Developer Calc Hex Dec Oct Bin is free to download, with no in-app purchases.

### Which has better reviews, Graycode or Developer Calc Hex Dec Oct Bin?

Developer Calc Hex Dec Oct Bin is rated higher. Graycode averages 3.0 out of 5 from 2 ratings, while Developer Calc Hex Dec Oct Bin averages 4.1 from 15 ratings.

### Do Graycode or Developer Calc Hex Dec Oct Bin have ads?

Developer Calc Hex Dec Oct Bin shows ads; Graycode does not.

### Which is updated more often, Graycode or Developer Calc Hex Dec Oct Bin?

Graycode ships an update every 10 months, and Developer Calc Hex Dec Oct Bin every 5 months. Most recently, Graycode was updated on September 25, 2026 and Developer Calc Hex Dec Oct Bin on October 6, 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.*