# King Math 24 vs Synthesis24

The clearest difference is in-app purchases: Synthesis24 at none against King Math 24's 4. Synthesis24 also leads on ads (none vs shown). King Math 24's advantage is update cadence (every 2 months vs every 3 months) and iOS requirement (12.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. King Math 24 sells 4 one-off in-app purchases. Synthesis24 asks for nothing beyond the download.

King Math 24 ships an update every 2 months, Synthesis24 every 3 months. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | King Math 24 | Synthesis24 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 211 MB | 49 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Jiajiaoshuo Network Technology Co., Ltd](https://appshunter.io/developer/541375915) | [杰超 杨](https://appshunter.io/developer/1364053114) |

## What reviewers say

### King Math 24

[App page](https://appshunter.io/ios/app/king-math-24/id1544648283)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 提示道具 | $0.29 | one-time |
| Buy Hints | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| 精致礼包 | $1.99 | one-time |


### Synthesis24

[App page](https://appshunter.io/ios/app/synthesis24/id1606353407)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is King Math 24 free?

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

### Is Synthesis24 free?

Synthesis24 is free to download, with no in-app purchases.

### Do King Math 24 or Synthesis24 have ads?

King Math 24 shows ads; Synthesis24 does not.

### Which is updated more often, King Math 24 or Synthesis24?

King Math 24 ships an update every 2 months, and Synthesis24 every 3 months. Most recently, King Math 24 was updated on September 17, 2026 and Synthesis24 on September 22, 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.*