# Colouroku vs Flex Sudoku

The clearest difference is review sentiment: Flex Sudoku at 50% against Colouroku's 0%. Flex Sudoku also leads on price (Free vs $0.99) and update cadence (every 2 months vs every 6 months). Colouroku's advantage is rating (4.0 vs 3.1). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Flex Sudoku is free to download; Colouroku costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Colouroku holds the better App Store score, 4.0 against 3.1. That said, the two scores are not equally well evidenced: Flex Sudoku has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 0% of Colouroku's written reviews are positive against 50% of Flex Sudoku's, so the app with the better star average is not the one people write more warmly about.

Colouroku ships an update every 6 months, Flex Sudoku every 2 months. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Colouroku | Flex Sudoku |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/colouroku/id351189555/reviews)** | [3.1 (8 ratings)](https://appshunter.io/ios/app/flex-sudoku/id1643590351/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | **Free** |
| Size | 14 MB | 4 MB |
| Requires iOS | **14.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kelvin Sherlock](https://appshunter.io/developer/293876735) | [Jatinder Gogna](https://appshunter.io/developer/1631001233) |

## What reviewers say

### Colouroku

[App page](https://appshunter.io/ios/app/colouroku/id351189555)

This game offers a unique twist on Sudoku, allowing players to solve puzzles using colors, numbers, or even animals. With seven difficulty levels, games can range from quick 30-second challenges to more involved 30-minute sessions.

**Highlights:** Color-based Sudoku puzzles, Number-based Sudoku puzzles, Animal-themed puzzles, Seven difficulty levels, Variable game length

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

**In-app purchases:** none


### Flex Sudoku

[App page](https://appshunter.io/ios/app/flex-sudoku/id1643590351)

Engage with challenging Sudoku puzzles of various sizes, from classic 9x9 to larger 16x16 and 25x25 grids. Load pre-made games, create your own, and utilize a built-in solver and note-taking features to enhance your solving experience.

**Highlights:** Multiple Sudoku grid sizes (4x4 to 25x25), Load thousands of built-in games, Enter and solve your own games, Adjustable difficulty levels, Built-in Sudoku solver, Note-taking and hint system, Track game statistics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Colouroku free?

Colouroku costs $0.99, with no in-app purchases.

### Is Flex Sudoku free?

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

### Which has better reviews, Colouroku or Flex Sudoku?

Colouroku is rated higher. Colouroku averages 4.0 out of 5 from 1 ratings, while Flex Sudoku averages 3.1 from 8 ratings.

### Do Colouroku or Flex Sudoku have ads?

Neither Colouroku nor Flex Sudoku shows ads.

### Which is updated more often, Colouroku or Flex Sudoku?

Colouroku ships an update every 6 months, and Flex Sudoku every 2 months. Most recently, Colouroku was updated on October 15, 2026 and Flex Sudoku on October 24, 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.*