# 知刷PRO vs 背考王小四门

The clearest difference is in-app purchases: 知刷PRO at none against 背考王小四门's 1. 知刷PRO also leads on update cadence (daily vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 背考王小四门 sells 1 one-off in-app purchase. 知刷PRO asks for nothing beyond the download.

知刷PRO ships an update daily, 背考王小四门 every 3 months. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 知刷PRO | 背考王小四门 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 months |
| Size | 47 MB | 113 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Wanxing (shandong) Network Technology Co., Ltd.](https://appshunter.io/developer/1855806476) | [Guangzhou Kaoba Education Technology Co., Ltd](https://appshunter.io/developer/1590959880) |

## What reviewers say

### 知刷PRO

[App page](https://appshunter.io/ios/app/pro/id6755715595)

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

**In-app purchases:** none


### 背考王小四门

[App page](https://appshunter.io/ios/app/id6757467909)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 背考王小四门会员 | $19.99 | one-time |


## Frequently asked questions

### Is 知刷PRO free?

知刷PRO is free to download, with no in-app purchases.

### Is 背考王小四门 free?

背考王小四门 is free to download, with in-app purchases available.

### Do 知刷PRO or 背考王小四门 have ads?

Neither 知刷PRO nor 背考王小四门 shows ads.

### Which is updated more often, 知刷PRO or 背考王小四门?

知刷PRO ships an update daily, and 背考王小四门 every 3 months. Most recently, 知刷PRO was updated on October 28, 2026 and 背考王小四门 on October 31, 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.*