# 学习成长21天 vs 啊哈时间

The clearest difference is in-app purchases: 学习成长21天 at none against 啊哈时间's 2. 学习成长21天 also leads on iOS requirement (9.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 啊哈时间 sells 2 in-app purchases, starting at $19.99 per month. 学习成长21天 asks for nothing beyond the download.

学习成长21天 ships an update weekly, 啊哈时间 every 5 days. The most recent releases landed on October 18, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | 学习成长21天 | 啊哈时间 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6790645674/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 66 MB | 179 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Youyixue Education Technology Co., Ltd.](https://appshunter.io/developer/1508981243) | [Aha Time Education](https://appshunter.io/developer/6790645676) |

## What reviewers say

### 学习成长21天

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

**In-app purchases:** none


### 啊哈时间

[App page](https://appshunter.io/ios/app/id6790645674)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月会员 | $19.99 | per month |
| 年度会员 | $179.99 | per year |


## 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 啊哈时间 free?

啊哈时间 is free to download, with in-app purchases available.

### Do 学习成长21天 or 啊哈时间 have ads?

Neither 学习成长21天 nor 啊哈时间 shows ads.

### Which is updated more often, 学习成长21天 or 啊哈时间?

学习成长21天 ships an update weekly, and 啊哈时间 every 5 days. Most recently, 学习成长21天 was updated on October 18, 2026 and 啊哈时间 on October 15, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*