# 口算批改 vs 加减法

The clearest difference is ads: 口算批改 at none against 加减法's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 口算批改 sells 3 in-app purchases, starting at $2.99 per month and 加减法 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

口算批改 ships an update every 2 months, 加减法 monthly. The most recent releases landed on October 7, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | 口算批改 | 加减法 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/id6443949151/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 17 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing iDOTOOLS Technology Co., Ltd](https://appshunter.io/developer/1627204739) | [杭州家之馨电子商务有限公司](https://appshunter.io/developer/1641228139) |

## What reviewers say

### 口算批改

[App page](https://appshunter.io/ios/app/id6443949151)

This app generates customized math practice problems for elementary school students, covering various operations and concepts. It offers flexible customization for problem types, ranges, and formats, with easy PDF generation for printing. New features include clock recognition and Sudoku.

**Highlights:** Generates customized math problems, Covers addition, subtraction, multiplication, division, Includes new features like clock recognition and Sudoku, Flexible customization of problem parameters, PDF generation for easy printing, Personalized layout options for printed problems

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度订阅 | $2.99 | per month |
| 永久 | $4.99 | one-time |
| 永久 | $19.99 | one-time |


### 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 |


## Frequently asked questions

### Is 口算批改 free?

口算批改 is free to download, with in-app purchases available.

### Is 加减法 free?

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

### Do 口算批改 or 加减法 have ads?

加减法 shows ads; 口算批改 does not.

### Which is updated more often, 口算批改 or 加减法?

口算批改 ships an update every 2 months, and 加减法 monthly. Most recently, 口算批改 was updated on October 7, 2026 and 加减法 on October 13, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*