# 贸数查 vs 屏卫PRO

The clearest difference is update cadence: 屏卫PRO at every 4 days against 贸数查's every 10 days. 贸数查's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

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

贸数查 ships an update every 10 days, 屏卫PRO every 4 days. The most recent releases landed on October 30, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 贸数查 | 屏卫PRO |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Size | 48 MB | 10 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Xiamen Knowshow Technology Co., Ltd.](https://appshunter.io/developer/558469001) | [Shenzhen Zhengyilong Technology Co.,Ltd](https://appshunter.io/developer/932771087) |

## What reviewers say

### 贸数查

[App page](https://appshunter.io/ios/app/id6474762543)

**Features:** macOS Compatibility

**In-app purchases:** none


### 屏卫PRO

[App page](https://appshunter.io/ios/app/pro/id6812643787)

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

**In-app purchases:** none


## Frequently asked questions

### Is 贸数查 free?

贸数查 is free to download, with no in-app purchases.

### Is 屏卫PRO free?

屏卫PRO is free to download, with no in-app purchases.

### Do 贸数查 or 屏卫PRO have ads?

Neither 贸数查 nor 屏卫PRO shows ads.

### Which is updated more often, 贸数查 or 屏卫PRO?

贸数查 ships an update every 10 days, and 屏卫PRO every 4 days. Most recently, 贸数查 was updated on October 30, 2026 and 屏卫PRO on November 3, 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.*