# 加减法 vs Arithmetic

The clearest difference is in-app purchases: Arithmetic at none against 加减法's 3. Arithmetic also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. 加减法 sells 3 one-off in-app purchases. Arithmetic asks for nothing beyond the download.

加减法 ships an update monthly, Arithmetic every 3 weeks. The most recent releases landed on September 9, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 加减法 | Arithmetic |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 17 MB | 29 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杭州家之馨电子商务有限公司](https://appshunter.io/developer/1641228139) | [Metademy](https://appshunter.io/developer/1675831131) |

## What reviewers say

### 加减法

[App page](https://appshunter.io/ios/app/id6449480332)

**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 | $11.99 | one-time |


### Arithmetic

[App page](https://appshunter.io/ios/app/arithmetic-the-24-point-game/id6450181545)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 加减法 free?

加减法 is free to download, with in-app purchases available.

### Is Arithmetic free?

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

### Do 加减法 or Arithmetic have ads?

加减法 shows ads; Arithmetic does not.

### Which is updated more often, 加减法 or Arithmetic?

加减法 ships an update monthly, and Arithmetic every 3 weeks. Most recently, 加减法 was updated on September 9, 2026 and Arithmetic on September 8, 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.*