# 小牛错题本 vs 优学错题本

The clearest difference is device support: 小牛错题本 at 2 against 优学错题本's —. On price, in-app purchases and iOS requirement 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 优学错题本 sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 小牛错题本 | 优学错题本 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Monthly | — |
| Size | 105 MB | 25 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | **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) | [清清 孔](https://appshunter.io/developer/1740686855) |

## 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 |


### 优学错题本

[App page](https://appshunter.io/ios/app/id6664059614)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $1.99 | per 7 days |
| 月会员 | $3.99 | per month |
| 年会员 | $19.99 | per year |


## 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 优学错题本 free?

优学错题本 is free to download, with in-app purchases available.

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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.*