# Colour Snap! vs SudokuOS

The clearest difference is in-app purchases: SudokuOS at none against Colour Snap!'s 1. SudokuOS also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Colour Snap! sells 1 one-off in-app purchase. SudokuOS asks for nothing beyond the download.

Colour Snap! ships an update every 5 days, SudokuOS every 4 days. The most recent releases landed on November 5, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Colour Snap! | SudokuOS |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 71.4% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | — | Free |
| Size | 7 MB | 10 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carolus Walraven](https://appshunter.io/developer/1822486357) | [Seidelapps](https://appshunter.io/developer/6819037694) |

## What reviewers say

### Colour Snap!

[App page](https://appshunter.io/ios/app/colour-snap/id6747701369)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Ads | $0.99 | one-time |


### SudokuOS

[App page](https://appshunter.io/ios/app/sudokuos/id6819037692)

Solve Sudoku puzzles with five difficulty levels on your iPhone or iPad. Utilize notes, candidates, hints, and an erase function. Track your progress with ratings and charts, and enjoy automatic saving for uninterrupted gameplay.

**Highlights:** Five difficulty levels, Notes and candidate filling, Hint and erase functions, Progress tracking and rating, Automatic game saving, Customizable accent colors and haptics

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

**In-app purchases:** none


## Frequently asked questions

### Is Colour Snap! free?

Colour Snap! is free to download, with in-app purchases available.

### Is SudokuOS free?

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

### Do Colour Snap! or SudokuOS have ads?

Colour Snap! shows ads; SudokuOS does not.

### Which is updated more often, Colour Snap! or SudokuOS?

Colour Snap! ships an update every 5 days, and SudokuOS every 4 days. Most recently, Colour Snap! was updated on November 5, 2026 and SudokuOS on November 10, 2026.

---

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