# WST軟水系統 vs Screen Time Control

The clearest difference is in-app purchases: WST軟水系統 at none against Screen Time Control's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Screen Time Control sells 3 in-app purchases, starting at $4.99 per 7 days. WST軟水系統 asks for nothing beyond the download.

## The numbers

| Metric | WST軟水系統 | Screen Time Control |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 6 MB | 57 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [WEIPINTEK Co Ltd](https://appshunter.io/developer/1479495838) | [CHAO-TING CHANG](https://appshunter.io/developer/1896691062) |

## What reviewers say

### WST軟水系統

[App page](https://appshunter.io/ios/app/wst/id6746904860)

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

**In-app purchases:** none


### Screen Time Control

[App page](https://appshunter.io/ios/app/screen-time-control-goallock/id6769819246)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Discounted Yearly Plan | $14.99 | per year |
| Yearly Plan | $49.99 | per year |


## Frequently asked questions

### Is WST軟水系統 free?

WST軟水系統 is free to download, with no in-app purchases.

### Is Screen Time Control free?

Screen Time Control is free to download, with in-app purchases available.

### Do WST軟水系統 or Screen Time Control have ads?

Neither WST軟水系統 nor Screen Time Control shows ads.

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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.*