# 优学错题本 vs 错题本

The clearest difference is in-app purchases: 错题本 at none against 优学错题本's 3. 错题本 also leads on device support. 优学错题本's advantage is iOS requirement (11.0 vs 13). On price there is nothing between them.

Both are free to download. 优学错题本 sells 3 in-app purchases, starting at $1.99 per 7 days. 错题本 asks for nothing beyond the download.

## The numbers

| Metric | 优学错题本 | 错题本 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | — | No |
| Size | 25 MB | 13 MB |
| Requires iOS | **11.0** | 13 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [清清 孔](https://appshunter.io/developer/1740686855) | [媛媛 钱](https://appshunter.io/developer/1869024065) |

## What reviewers say

### 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 |


### 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 优学错题本 free?

优学错题本 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.

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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.*