# Strong Mind Puzzles vs Sudoku 21A

The clearest difference is review sentiment: Strong Mind Puzzles at 45% against Sudoku 21A's 0%. Strong Mind Puzzles also leads on rating (3.8 vs 1.0) and ads (none vs shown). Sudoku 21A's advantage is price (Free vs $29.99) and in-app purchases (none vs 1). On device support there is nothing between them.

Sudoku 21A is free to download; Strong Mind Puzzles costs $29.99 up front. Strong Mind Puzzles sells 1 one-off in-app purchase. Sudoku 21A asks for nothing beyond the download.

Strong Mind Puzzles holds the better App Store score, 3.8 against 1.0. That said, the two scores are not equally well evidenced: Strong Mind Puzzles has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 45% of Strong Mind Puzzles's written reviews are positive against 0% of Sudoku 21A's.

Strong Mind Puzzles ships an update every 5 weeks, Sudoku 21A every 8 months. The most recent releases landed on November 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Strong Mind Puzzles | Sudoku 21A |
| --- | --- | --- |
| Price | $29.99 | **Free** |
| Rating | **[3.8 (11 ratings)](https://appshunter.io/ios/app/strong-mind-puzzles/id396769075/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/sudoku-21a/id1554695823/reviews) |
| Number of ratings | **11** | 2 |
| Positive reviews | **45.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 8 months |
| Monetization | Paid | **Ad-supported** |
| Size | 9 MB | 48 MB |
| Requires iOS | 18.2 | **14.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Donalee Markus](https://appshunter.io/developer/396769078) | [David Barbero Carbonell](https://appshunter.io/developer/1511168059) |

## What reviewers say

### Strong Mind Puzzles

[App page](https://appshunter.io/ios/app/strong-mind-puzzles/id396769075)

This game challenges your brain with progressively difficult puzzles designed to enhance cognitive skills. It helps users reduce impulsivity, improve planning, and develop introspection through unique gameplay mechanics.

**Highlights:** Progressively difficult puzzle variations, Internal dialogue for skill building, Reduces impulsivity, Enhances planning behavior, Encourages introspection, Error-detection reflex training

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Levels 4-9 | $1.99 | one-time |


### Sudoku 21A

[App page](https://appshunter.io/ios/app/sudoku-21a/id1554695823)

Challenge your brain with a free Sudoku app offering multiple difficulty levels and two engaging game modes. Compete against yourself or friends online with an endless supply of puzzles and helpful aids.

**Highlights:** Six difficulty levels, Individual game mode, Online multiplayer mode, Infinite Sudoku combinations, In-game clues, Customizable features, Smart aids

**In-app purchases:** none


## Frequently asked questions

### Is Strong Mind Puzzles free?

Strong Mind Puzzles costs $29.99, and also offers in-app purchases.

### Is Sudoku 21A free?

Sudoku 21A is free to download, with no in-app purchases.

### Which has better reviews, Strong Mind Puzzles or Sudoku 21A?

Strong Mind Puzzles is rated higher. Strong Mind Puzzles averages 3.8 out of 5 from 11 ratings, while Sudoku 21A averages 1.0 from 2 ratings.

### Do Strong Mind Puzzles or Sudoku 21A have ads?

Sudoku 21A shows ads; Strong Mind Puzzles does not.

### Which is updated more often, Strong Mind Puzzles or Sudoku 21A?

Strong Mind Puzzles ships an update every 5 weeks, and Sudoku 21A every 8 months. Most recently, Strong Mind Puzzles was updated on November 1, 2026 and Sudoku 21A on October 9, 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.*