# Sudokunu vs cardinal.

The clearest difference is update cadence: cardinal. at every 3 days against Sudokunu's every 42 months. cardinal. also leads on iOS requirement (11.0 vs 18.6). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Sudokunu against 4.9 for cardinal.. Both are backed by a comparable volume of ratings — 6 and 14 respectively.

Sudokunu ships an update every 42 months, cardinal. every 3 days. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sudokunu | cardinal. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/sudokunu/id1031986800/reviews)** | [4.9 (14 ratings)](https://appshunter.io/ios/app/cardinal/id1589334930/reviews) |
| Number of ratings | 6 | **14** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 3 days** |
| Monetization | Free | Free |
| Size | 2 MB | 99 MB |
| Requires iOS | 18.6 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [James Studt](https://appshunter.io/developer/1031986799) | [Perfect Hat Games LLC](https://appshunter.io/developer/1124547329) |

## What reviewers say

### Sudokunu

[App page](https://appshunter.io/ios/app/sudokunu/id1031986800)

A minimalist and peaceful number puzzle game. It features a clear monochrome display and intuitive cell filling. Optional assistants highlight the board using common solving techniques to help improve your skills.

**Highlights:** Minimalist monochrome design, Intuitive cell filling, Highlighting assistants, Sudoku solving technique guidance, Peaceful puzzle experience

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

**In-app purchases:** none


### cardinal.

[App page](https://appshunter.io/ios/app/cardinal/id1589334930)

Engage in a minimalistic logic puzzle game where you deduce a secret solution using sixteen cards and clues. Enjoy procedurally generated boards for endless play and compete globally in daily challenges.

**Highlights:** Minimalistic logic puzzles, Deduce secret solutions, Procedurally generated boards, Endless regular mode, Daily global competitions, 16 logic cards

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

**In-app purchases:** none


## Frequently asked questions

### Is Sudokunu free?

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

### Is cardinal. free?

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

### Which has better reviews, Sudokunu or cardinal.?

Sudokunu is rated higher. Sudokunu averages 5.0 out of 5 from 6 ratings, while cardinal. averages 4.9 from 14 ratings.

### Do Sudokunu or cardinal. have ads?

Neither Sudokunu nor cardinal. shows ads.

### Which is updated more often, Sudokunu or cardinal.?

Sudokunu ships an update every 42 months, and cardinal. every 3 days. Most recently, Sudokunu was updated on October 6, 2026 and cardinal. on October 24, 2026.

---

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