# 优学错题本 vs 手机扫描王

The clearest difference is device support: 手机扫描王 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. 优学错题本 sells 3 in-app purchases, starting at $1.99 per 7 days and 手机扫描王 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 优学错题本 | 手机扫描王 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | — | No |
| Update frequency | — | Every 2 months |
| Size | 25 MB | 18 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | — | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [清清 孔](https://appshunter.io/developer/1740686855) | [汶锦 郭](https://appshunter.io/developer/1770781884) |

## 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 |


### 手机扫描王

[App page](https://appshunter.io/ios/app/pdf/id6736859882)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $3.99 | per 7 days |
| 月会员 | $7.99 | per month |
| 永久会员 | $24.99 | one-time |


## 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 手机扫描王 free?

手机扫描王 is free to download, with in-app purchases available.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*