# 小牛错题本 vs 试卷橡皮擦

The clearest difference is update cadence: 小牛错题本 at monthly against 试卷橡皮擦's every 9 months. 小牛错题本 also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 小牛错题本 sells 4 in-app purchases, starting at $2.99 per month and 试卷橡皮擦 sells 3 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

小牛错题本 ships an update monthly, 试卷橡皮擦 every 9 months. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 小牛错题本 | 试卷橡皮擦 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Size | 105 MB | 30 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市云领天下科技有限公司](https://appshunter.io/developer/725440563) | [枭雄 毛](https://appshunter.io/developer/1747634657) |

## What reviewers say

### 小牛错题本

[App page](https://appshunter.io/ios/app/id6474232623)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小牛错题本连续包月（1个月） | $2.99 | per month |
| 小牛错题本连续包季（3个月） | $5.99 | per 3 months |
| 小牛错题本会员1个月 | $3.99 | one-time |
| 小牛错题本会员6个月 | $14.99 | one-time |


### 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 |


## Frequently asked questions

### Is 小牛错题本 free?

小牛错题本 is free to download, with in-app purchases available.

### Is 试卷橡皮擦 free?

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

### Do 小牛错题本 or 试卷橡皮擦 have ads?

Neither 小牛错题本 nor 试卷橡皮擦 shows ads.

### Which is updated more often, 小牛错题本 or 试卷橡皮擦?

小牛错题本 ships an update monthly, and 试卷橡皮擦 every 9 months. Most recently, 小牛错题本 was updated on October 16, 2026 and 试卷橡皮擦 on October 1, 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.*