# 学习成长21天 vs 白大嘴教育

The clearest difference is in-app purchases: 学习成长21天 at none against 白大嘴教育's 2. 学习成长21天 also leads on update cadence (weekly vs every 12 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 白大嘴教育 sells 2 one-off in-app purchases. 学习成长21天 asks for nothing beyond the download.

学习成长21天 ships an update weekly, 白大嘴教育 every 12 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 学习成长21天 | 白大嘴教育 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 12 months |
| Size | 66 MB | 112 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Youyixue Education Technology Co., Ltd.](https://appshunter.io/developer/1508981243) | [Shenzhen Bailu Yunshuju Technology Co., Ltd.](https://appshunter.io/developer/1597415178) |

## What reviewers say

### 学习成长21天

[App page](https://appshunter.io/ios/app/21/id1518769944)

**In-app purchases:** none


### 白大嘴教育

[App page](https://appshunter.io/ios/app/id1597424557)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 白大嘴教育VIP年卡 | $29.99 | one-time |
| 白大嘴教育VIP3年会员卡 | $79.99 | one-time |


## Frequently asked questions

### Is 学习成长21天 free?

学习成长21天 is free to download, with no in-app purchases.

### Is 白大嘴教育 free?

白大嘴教育 is free to download, with in-app purchases available.

### Do 学习成长21天 or 白大嘴教育 have ads?

Neither 学习成长21天 nor 白大嘴教育 shows ads.

### Which is updated more often, 学习成长21天 or 白大嘴教育?

学习成长21天 ships an update weekly, and 白大嘴教育 every 12 months. Most recently, 学习成长21天 was updated on October 25, 2026 and 白大嘴教育 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.*