# Math 24 vs 9BLOCK

The clearest difference is in-app purchases: 9BLOCK at none against Math 24's 4. 9BLOCK also leads on ads (none vs shown) and review sentiment (100% vs 76%). Math 24's advantage is ratings volume (2.2K vs 3) and iOS requirement (10.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. Math 24 sells 4 one-off in-app purchases. 9BLOCK asks for nothing beyond the download.

9BLOCK holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Math 24 has 2.2K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 76% of Math 24's written reviews are positive against 100% of 9BLOCK's.

Math 24 ships an update every 6 weeks, 9BLOCK every 3 weeks. The most recent releases landed on October 24, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Math 24 | 9BLOCK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (2.2K ratings)](https://appshunter.io/ios/app/math-24-mental-math-cards/id1274499822/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/9block-memory-game/id6785684483/reviews)** |
| Number of ratings | **2.2K** | 3 |
| Positive reviews | 75.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 33 MB | 23 MB |
| Requires iOS | **10.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peikun Duan](https://appshunter.io/developer/1240254007) | [Duncan Fondren](https://appshunter.io/developer/6785684485) |

## What reviewers say

### Math 24

[App page](https://appshunter.io/ios/app/math-24-mental-math-cards/id1274499822)

This app offers a classic arithmetic puzzle where players combine four numbers using basic operations to reach 24. It features progressive difficulty levels, a timed challenge mode, and integration with Game Center for leaderboards and achievements.

**Highlights:** Combine four numbers to make 24, Addition, subtraction, multiplication, division, Stage mode with 300 levels, Speed mode for timed challenges, Game Center leaderboards and achievements, Help button for difficult questions

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 12 Tips | $1.39 | one-time |
| Remove Ads | $2.39 | one-time |
| 20 Tips | $2.39 | one-time |
| 20 Tips + Remove Ads | $3.99 | one-time |

**What reviewers like**

- 🚀 Fun and challenging
- 👍 Helps improve math skills
- 👍 Great brain training
- 👍 Convenient and accessible

**What reviewers complain about**

- 🙄 Too many ads
- 🐛 Bugs and issues with ads
- 🙄 Levels too difficult

**Reported bugs**

- Incorrect solutions provided
- Ads not working properly
- Syncing issues across devices

**Requested features**

- Add negative numbers and more features
- Option to favorite/save questions
- Difficulty levels (easy, medium, hard)


### 9BLOCK

[App page](https://appshunter.io/ios/app/9block-memory-game/id6785684483)

This minimalist game challenges your visual recall and focus by requiring you to memorize the order of numbers on nine blocks. It's a quick, engaging experience that's easy to learn but difficult to master.

**Highlights:** Memorize number order, Tap numbers 1-9, Improve longest streak, Ranked progression, Customize blocks and reveal time, Track personal bests

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

**In-app purchases:** none


## Frequently asked questions

### Is Math 24 free?

Math 24 is free to download, with in-app purchases available.

### Is 9BLOCK free?

9BLOCK is free to download, with no in-app purchases.

### Which has better reviews, Math 24 or 9BLOCK?

9BLOCK is rated higher. Math 24 averages 4.7 out of 5 from 2.2K ratings, while 9BLOCK averages 5.0 from 3 ratings.

### Do Math 24 or 9BLOCK have ads?

Math 24 shows ads; 9BLOCK does not.

### Which is updated more often, Math 24 or 9BLOCK?

Math 24 ships an update every 6 weeks, and 9BLOCK every 3 weeks. Most recently, Math 24 was updated on October 24, 2026 and 9BLOCK on October 15, 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.*