# 错题本 vs QuickErrNote

The clearest difference is in-app purchases: 错题本 at none against QuickErrNote's 3. 错题本 also leads on iOS requirement (13 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. QuickErrNote sells 3 one-off in-app purchases. 错题本 asks for nothing beyond the download.

## The numbers

| Metric | 错题本 | QuickErrNote |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 days |
| Size | 13 MB | 6 MB |
| Requires iOS | **13** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [媛媛 钱](https://appshunter.io/developer/1869024065) | [HappyTimes Tech Co., Ltd.](https://appshunter.io/developer/1455774641) |

## What reviewers say

### 错题本

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

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

**In-app purchases:** none


### QuickErrNote

[App page](https://appshunter.io/ios/app/quickerrnote-ai-error-notebook/id6801344489)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 120 Points | $0.99 | one-time |
| 400 Points | $1.99 | one-time |
| 3500 Points | $12.99 | one-time |


## Frequently asked questions

### Is 错题本 free?

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

### Is QuickErrNote free?

QuickErrNote is free to download, with in-app purchases available.

### Do 错题本 or QuickErrNote have ads?

Neither 错题本 nor QuickErrNote 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.*