# Atlas學習助手 vs 松鼠鎖

The clearest difference is in-app purchases: Atlas學習助手 at none against 松鼠鎖's 3. Atlas學習助手 also leads on iOS requirement (14.0 vs 16.0). 松鼠鎖's advantage is update cadence (every 3 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. 松鼠鎖 sells 3 in-app purchases, starting at $4.99 per month. Atlas學習助手 asks for nothing beyond the download.

Atlas學習助手 ships an update every 3 weeks, 松鼠鎖 every 3 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Atlas學習助手 | 松鼠鎖 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Size | 32 MB | 115 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [菁英國際文教事業股份有限公司](https://appshunter.io/developer/1033460991) | [Evan Tsai](https://appshunter.io/developer/1895553439) |

## What reviewers say

### Atlas學習助手

[App page](https://appshunter.io/ios/app/atlas/id6443611842)

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

**In-app purchases:** none


### 松鼠鎖

[App page](https://appshunter.io/ios/app/app/id6763912454)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 松鼠鎖 Premium - 月訂閱 | $4.99 | per month |
| 松鼠鎖 Premium - 年訂閱 | $29.99 | per year |
| 松鼠鎖 Premium - 終身使用權 | $99.99 | one-time |


## Frequently asked questions

### Is Atlas學習助手 free?

Atlas學習助手 is free to download, with no in-app purchases.

### Is 松鼠鎖 free?

松鼠鎖 is free to download, with in-app purchases available.

### Do Atlas學習助手 or 松鼠鎖 have ads?

Neither Atlas學習助手 nor 松鼠鎖 shows ads.

### Which is updated more often, Atlas學習助手 or 松鼠鎖?

Atlas學習助手 ships an update every 3 weeks, and 松鼠鎖 every 3 days. Most recently, Atlas學習助手 was updated on October 25, 2026 and 松鼠鎖 on October 20, 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.*