# 记忆力训练营 vs 极限挑战

The clearest difference is in-app purchases: 极限挑战 at none against 记忆力训练营's 3. 记忆力训练营's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 记忆力训练营 sells 3 one-off in-app purchases. 极限挑战 asks for nothing beyond the download.

## The numbers

| Metric | 记忆力训练营 | 极限挑战 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 2 months | — |
| Size | 16 MB | 24 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [杭州家之馨电子商务有限公司](https://appshunter.io/developer/1641228139) | [Beijing Houyuan Zhixing Technology Co.,Ltd.](https://appshunter.io/developer/1144345874) |

## What reviewers say

### 记忆力训练营

[App page](https://appshunter.io/ios/app/id6444061624)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $4.99 | one-time |
| 半年会员 | $7.99 | one-time |
| 年度会员 | $9.99 | one-time |


### 极限挑战

[App page](https://appshunter.io/ios/app/id6463661714)

**In-app purchases:** none


## Frequently asked questions

### Is 记忆力训练营 free?

记忆力训练营 is free to download, with in-app purchases available.

### Is 极限挑战 free?

极限挑战 is free to download, with no in-app purchases.

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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.*