Sudokunu vs cardinal.
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudokunu
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.
- Minimalist monochrome design
- Intuitive cell filling
- Highlighting assistants
- Sudoku solving technique guidance
- Peaceful puzzle experience
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Sudokunu is a minimalist presentation of the popular number puzzle for you to peacefully solve. The puzzle is displayed clearly in simple monochrome. When you deduce a digit you simply touch the cell and it will fill itself in. You can toggle assistants to highlight the board using common sudoku solving techniques. These are useful for improving your sudoku solving skills and helping you out in a tricky puzzle.
cardinal.
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.
- Minimalistic logic puzzles
- Deduce secret solutions
- Procedurally generated boards
- Endless regular mode
- Daily global competitions
- 16 logic cards
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Minimalistic yet challenging, CARDINAL gives you sixteen different cards and clues in which you must figure out the secret solution! Begin with the cardinal rule you can then continue to creatively deduce the solution from there! An endless amount of procedurally generated boards waits for you in regular mode. And when you feel ready, test yourself in the daily competition alongside players from all over the globe.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Sudokunu | cardinal. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (6 ratings) — better | 4.9 (14 ratings) |
| Positive reviews | — | 80.0% of reviews |
| Number of ratings | 6 | 14 — better |
| Update frequency | Every 42 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 99 MB |
| Age rating | 4+ | 4+ |
| Developer | James Studt | Perfect Hat Games LLC |
Customer experience
Sudokunu
cardinal.
In-app purchases
Sudokunu
No in-app purchases
cardinal.
No in-app purchases
