Sudoku Express vs cardinal.
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku Express
Enjoy a classic Sudoku experience with a clean, minimalist interface designed for focused puzzle-solving. Customize your game with multiple color and font options. Offers over 1,000 unique puzzles across easy, medium, and hard difficulties for extended gameplay.
- Minimalist flat UI design
- Easy noting system
- Multiple color schemes
- Font selection for customization
- 1,001 unique puzzles per difficulty
- Easy, Medium, and Hard difficulty levels
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The classic Sudoku game at its best for iOS! A version for those who just want to solve the puzzles. A minimalist, flat UI design and easy noting allow you to focus on the point of the game, which is solving the puzzles! Multiple color schemes and font selections allow you to customize the experience to your preferences. With 1,001 unique puzzles each for the included Easy, Medium and Hard puzzles, you will be challenged for hours, days and weeks.
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 review sentiment: cardinal. at 75% against Sudoku Express's 23%. cardinal. also leads on price (Free vs $3.99) and rating (5.0 vs 4.5). Sudoku Express's advantage is ratings volume (84 vs 12). On ads, in-app purchases and device support 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
cardinal. is free to download; Sudoku Express costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
cardinal. holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Sudoku Express has 84 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 23% of Sudoku Express's written reviews are positive against 75% of cardinal.'s.
Sudoku Express ships an update every 6 weeks, cardinal. every 3 days. The most recent releases landed on September 20, 2026 and July 21, 2026 respectively.
| Parameter | Sudoku Express | cardinal. |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 4.5 (84 ratings) | 5.0 (12 ratings) — better |
| Positive reviews | 23.1% of reviews | 75.0% of reviews — better |
| Number of ratings | 84 — better | 12 |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 99 MB |
| Age rating | 4+ | 4+ |
| Developer | Pheinex, LLC | Perfect Hat Games LLC |
Customer experience
Sudoku Express
cardinal.
In-app purchases
Sudoku Express
No in-app purchases
cardinal.
No in-app purchases
Questions
Is Sudoku Express free?
Is cardinal. free?
Which has better reviews, Sudoku Express or cardinal.?
Do Sudoku Express or cardinal. have ads?
Which is updated more often, Sudoku Express or cardinal.?
Other comparisons
