# Synthesis24 vs 24点口算

The clearest difference is in-app purchases: Synthesis24 at none against 24点口算's 3. Synthesis24 also leads on ads (none vs shown). 24点口算's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence and device support there is nothing between them.

Both are free to download. 24点口算 sells 3 one-off in-app purchases. Synthesis24 asks for nothing beyond the download.

Synthesis24 ships an update every 3 months, 24点口算 every 2 months. The most recent releases landed on September 22, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Synthesis24 | 24点口算 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 49 MB | 42 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [杰超 杨](https://appshunter.io/developer/1364053114) | [杭州家之馨电子商务有限公司](https://appshunter.io/developer/1641228139) |

## What reviewers say

### Synthesis24

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 24点口算

[App page](https://appshunter.io/ios/app/24/id6443912541)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $4.99 | one-time |
| 半年会员 | $7.99 | one-time |
| 年度会员 | $9.99 | one-time |


## Frequently asked questions

### Is Synthesis24 free?

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

### Is 24点口算 free?

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

### Do Synthesis24 or 24点口算 have ads?

24点口算 shows ads; Synthesis24 does not.

### Which is updated more often, Synthesis24 or 24点口算?

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