# 云证签 vs Contract Lab

The clearest difference is update cadence: Contract Lab at weekly against 云证签's every 2 months. 云证签's advantage is iOS requirement (11.0 vs 18.0). 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.

云证签 ships an update every 2 months, Contract Lab weekly. The most recent releases landed on September 29, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 云证签 | Contract Lab |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 58 MB | 69 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [中国金融认证中心](https://appshunter.io/developer/510293770) | [奇 林](https://appshunter.io/developer/1896582109) |

## What reviewers say

### 云证签

[App page](https://appshunter.io/ios/app/id1629355526)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contract Lab

[App page](https://appshunter.io/ios/app/contract-lab/id6768622992)

**In-app purchases:** none


## Frequently asked questions

### Is 云证签 free?

云证签 is free to download, with no in-app purchases.

### Is Contract Lab free?

Contract Lab is free to download, with no in-app purchases.

### Do 云证签 or Contract Lab have ads?

Neither 云证签 nor Contract Lab shows ads.

### Which is updated more often, 云证签 or Contract Lab?

云证签 ships an update every 2 months, and Contract Lab weekly. Most recently, 云证签 was updated on September 29, 2026 and Contract Lab on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*