# 卓信签Pro vs Network Tester

The clearest difference is update cadence: 卓信签Pro at every 2 months against Network Tester's every 4 months. 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.

卓信签Pro ships an update every 2 months, Network Tester every 4 months. The most recent releases landed on September 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 卓信签Pro | Network Tester |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 12 MB | 21 MB |
| Requires iOS | **10.0** | 11.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [山东卓码信息技术有限公司](https://appshunter.io/developer/1484067461) | [北京创奇易科技有限公司](https://appshunter.io/developer/1682825654) |

## What reviewers say

### 卓信签Pro

[App page](https://appshunter.io/ios/app/pro/id1610080599)

**Features:** macOS Compatibility

**In-app purchases:** none


### Network Tester

[App page](https://appshunter.io/ios/app/network-tester/id1665802240)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 卓信签Pro free?

卓信签Pro is free to download, with no in-app purchases.

### Is Network Tester free?

Network Tester is free to download, with no in-app purchases.

### Do 卓信签Pro or Network Tester have ads?

Neither 卓信签Pro nor Network Tester shows ads.

### Which is updated more often, 卓信签Pro or Network Tester?

卓信签Pro ships an update every 2 months, and Network Tester every 4 months. Most recently, 卓信签Pro was updated on September 15, 2026 and Network Tester on September 17, 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.*