# 公嗨课 vs 闯关鸭

The clearest difference is update cadence: 公嗨课 at every 3 weeks against 闯关鸭's every 7 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 公嗨课 sells 10 one-off in-app purchases and 闯关鸭 sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

公嗨课 ships an update every 3 weeks, 闯关鸭 every 7 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 公嗨课 | 闯关鸭 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 7 months |
| Size | 56 MB | 40 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Beijing Maituo Technology Co.,Ltd](https://appshunter.io/developer/1599696075) | [Guangzhou Don Quixote Education Technology Co., Ltd.](https://appshunter.io/developer/1135753513) |

## What reviewers say

### 公嗨课

[App page](https://appshunter.io/ios/app/id1508477692)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 公嗨课课程278 | $43.99 | one-time |
| 公嗨课课程648 | $99.99 | one-time |
| 公嗨课课程698 | $99.99 | one-time |
| 公嗨课课程798 | $119.99 | one-time |
| 公嗨课课程848 | $129.99 | one-time |
| 公嗨课课程1248 | $189.99 | one-time |
| 公嗨课课程1298 | $199.99 | one-time |
| 公嗨课课程1398 | $209.99 | one-time |
| 公嗨课课程1998 | $299.99 | one-time |
| 公嗨课课程2298 | $349.99 | one-time |


### 闯关鸭

[App page](https://appshunter.io/ios/app/id6462012790)

**Features:** macOS Compatibility

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 谷粒1.00 | $0.99 | one-time |
| 谷粒6.00 | $0.99 | one-time |
| 谷粒12.00 | $1.99 | one-time |
| 谷粒18.00 | $2.99 | one-time |
| 谷粒45.00 | $5.99 | one-time |
| 谷粒88.00 | $12.99 | one-time |
| 谷粒168.00 | $24.99 | one-time |
| 谷粒198.00 | $29.99 | one-time |


## Frequently asked questions

### Is 公嗨课 free?

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

### Is 闯关鸭 free?

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

### Do 公嗨课 or 闯关鸭 have ads?

Neither 公嗨课 nor 闯关鸭 shows ads.

### Which is updated more often, 公嗨课 or 闯关鸭?

公嗨课 ships an update every 3 weeks, and 闯关鸭 every 7 months. Most recently, 公嗨课 was updated on November 3, 2026 and 闯关鸭 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.*