# 试卷橡皮擦 vs 错题本

The clearest difference is in-app purchases: 错题本 at none against 试卷橡皮擦's 3. 错题本 also leads on iOS requirement (13 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. 试卷橡皮擦 sells 3 in-app purchases, starting at $2.99 per 7 days. 错题本 asks for nothing beyond the download.

## The numbers

| Metric | 试卷橡皮擦 | 错题本 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | — |
| Size | 30 MB | 13 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [枭雄 毛](https://appshunter.io/developer/1747634657) | [媛媛 钱](https://appshunter.io/developer/1869024065) |

## What reviewers say

### 试卷橡皮擦

[App page](https://appshunter.io/ios/app/ai/id6749604691)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 慧写解题连续周会员 | $2.99 | per 7 days |
| 连续包月会员 | $3.99 | per month |
| 连续包季会员 | $7.99 | per 3 months |


### 错题本

[App page](https://appshunter.io/ios/app/id6793146293)

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

**In-app purchases:** none


## Frequently asked questions

### Is 试卷橡皮擦 free?

试卷橡皮擦 is free to download, with in-app purchases available.

### Is 错题本 free?

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

### Do 试卷橡皮擦 or 错题本 have ads?

Neither 试卷橡皮擦 nor 错题本 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.*