# Decoder vs Color Sudoku

The clearest difference is review sentiment: Color Sudoku at 100% against Decoder's 0%. Color Sudoku also leads on rating (4.9 vs 1.2) and update cadence (every 9 days vs every 7 months). Decoder's advantage is in-app purchases (none vs 5) and ads (none vs shown). On price, ratings volume and device support there is nothing between them.

Both are free to download. Color Sudoku sells 5 one-off in-app purchases. Decoder asks for nothing beyond the download.

Color Sudoku holds the better App Store score, 4.9 against 1.2. Both are backed by a comparable volume of ratings — 5 and 10 respectively. Written reviews point the same way: 0% of Decoder's written reviews are positive against 100% of Color Sudoku's.

Decoder ships an update every 7 months, Color Sudoku every 9 days. The most recent releases landed on October 31, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Decoder | Color Sudoku |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.2 (5 ratings)](https://appshunter.io/ios/app/decoder/id294816947/reviews) | **[4.9 (10 ratings)](https://appshunter.io/ios/app/color-sudoku-logic-blocks/id6499296812/reviews)** |
| Number of ratings | 5 | **10** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 10 MB |
| Requires iOS | **7.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Edwin Hou](https://appshunter.io/developer/292240393) | [MigoApps, LLC](https://appshunter.io/developer/441790439) |

## What reviewers say

### Decoder

[App page](https://appshunter.io/ios/app/decoder/id294816947)

This app assists players in solving the Mastermind logic game. It helps narrow down possible solutions by analyzing your guesses and their scores. Continue inputting your game progress until only one solution remains.

**Highlights:** Mastermind game solver, Input guesses and scores, Reduces possible solutions, Guides to single solution

**Features:** macOS Compatibility

**In-app purchases:** none


### Color Sudoku

[App page](https://appshunter.io/ios/app/color-sudoku-logic-blocks/id6499296812)

This logic puzzle game challenges you to fill color regions with numbers 1-N without adjacent repeats, even diagonally. It offers smart notes, hints, and adjustable difficulty levels from Easy to Expert, with daily challenges and customizable themes.

**Highlights:** Color region number filling, No adjacent or diagonal repeats, Smart notes and hints, Multiple difficulty levels, Daily challenges, Customizable themes

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10 Hints | $0.99 | one-time |
| 25 Hints | $1.99 | one-time |
| Remove ads | $1.99 | one-time |
| 50 Hints | $2.99 | one-time |
| 125 Hints | $4.99 | one-time |


## Frequently asked questions

### Is Decoder free?

Decoder is free to download, with no in-app purchases.

### Is Color Sudoku free?

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

### Which has better reviews, Decoder or Color Sudoku?

Color Sudoku is rated higher. Decoder averages 1.2 out of 5 from 5 ratings, while Color Sudoku averages 4.9 from 10 ratings.

### Do Decoder or Color Sudoku have ads?

Color Sudoku shows ads; Decoder does not.

### Which is updated more often, Decoder or Color Sudoku?

Decoder ships an update every 7 months, and Color Sudoku every 9 days. Most recently, Decoder was updated on October 31, 2026 and Color Sudoku on October 30, 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.*