# 学习成长21天 vs 多特e专注

学习成长21天 and 多特e专注 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

学习成长21天 ships an update weekly, 多特e专注 every 9 days. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | 学习成长21天 | 多特e专注 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 9 days |
| Size | 66 MB | 115 MB |
| Requires iOS | **9.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Guangdong Youyixue Education Technology Co., Ltd.](https://appshunter.io/developer/1508981243) | [福建中科多特健康科技有限公司](https://appshunter.io/developer/1589547274) |

## What reviewers say

### 学习成长21天

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

**In-app purchases:** none


### 多特e专注

[App page](https://appshunter.io/ios/app/e/id1592028758)

**Features:** macOS Compatibility

**In-app purchases:** none


## 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 多特e专注 free?

多特e专注 is free to download, with no in-app purchases.

### Do 学习成长21天 or 多特e专注 have ads?

Neither 学习成长21天 nor 多特e专注 shows ads.

### Which is updated more often, 学习成长21天 or 多特e专注?

学习成长21天 ships an update weekly, and 多特e专注 every 9 days. Most recently, 学习成长21天 was updated on September 13, 2026 and 多特e专注 on September 20, 2026.

---

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