# 纠错大师 vs 小四门宝典

The clearest difference is iOS requirement: 小四门宝典 at 13.0 against 纠错大师's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

纠错大师 ships an update fortnightly, 小四门宝典 monthly. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 纠错大师 | 小四门宝典 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Size | 99 MB | 76 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [杭州扶志科技有限公司](https://appshunter.io/developer/1651860833) | [北京贝趣科技有限责任公司](https://appshunter.io/developer/1458314757) |

## What reviewers say

### 纠错大师

[App page](https://appshunter.io/ios/app/ai/id6444046564)

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

**In-app purchases:** none


### 小四门宝典

[App page](https://appshunter.io/ios/app/id6737684650)

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

**In-app purchases:** none


## Frequently asked questions

### Is 纠错大师 free?

纠错大师 is free to download, with no in-app purchases.

### Is 小四门宝典 free?

小四门宝典 is free to download, with no in-app purchases.

### Do 纠错大师 or 小四门宝典 have ads?

Neither 纠错大师 nor 小四门宝典 shows ads.

### Which is updated more often, 纠错大师 or 小四门宝典?

纠错大师 ships an update fortnightly, and 小四门宝典 monthly. Most recently, 纠错大师 was updated on November 3, 2026 and 小四门宝典 on October 27, 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.*