# Mental Arithmetic Challenge vs 口算批改

The clearest difference is in-app purchases: Mental Arithmetic Challenge at none against 口算批改's 3. Mental Arithmetic Challenge also leads on iOS requirement (9.0 vs 14.0). On price, ads 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. Mental Arithmetic Challenge asks for nothing beyond the download.

## The numbers

| Metric | Mental Arithmetic Challenge | 口算批改 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (3 ratings)](https://appshunter.io/ios/app/id6443949151/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 46 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zhuhai Record Yi Technology Co.,Ltd.](https://appshunter.io/developer/1638483191) | [Beijing iDOTOOLS Technology Co., Ltd](https://appshunter.io/developer/1627204739) |

## What reviewers say

### Mental Arithmetic Challenge

[App page](https://appshunter.io/ios/app/mental-arithmetic-challenge/id1668985552)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Mental Arithmetic Challenge free?

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

### Is 口算批改 free?

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

### Do Mental Arithmetic Challenge or 口算批改 have ads?

Neither Mental Arithmetic Challenge nor 口算批改 shows ads.

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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.*