# 公证IDC vs 江证链

The clearest difference is update cadence: 江证链 at every 5 days against 公证IDC's every 2 months. 江证链 also leads on iOS requirement (13.0 vs 15.6). 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.

公证IDC ships an update every 2 months, 江证链 every 5 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 公证IDC | 江证链 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Size | 16 MB | 53 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [北京慧阅信息服务有限公司](https://appshunter.io/developer/1042164948) | [Ganjiang Notary Public Office of Nanchang City, Jiangxi Province](https://appshunter.io/developer/1621472260) |

## What reviewers say

### 公证IDC

[App page](https://appshunter.io/ios/app/idc/id1184796980)

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

**In-app purchases:** none


### 江证链

[App page](https://appshunter.io/ios/app/id6739123521)

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

**In-app purchases:** none


## Frequently asked questions

### Is 公证IDC free?

公证IDC is free to download, with no in-app purchases.

### Is 江证链 free?

江证链 is free to download, with no in-app purchases.

### Do 公证IDC or 江证链 have ads?

Neither 公证IDC nor 江证链 shows ads.

### Which is updated more often, 公证IDC or 江证链?

公证IDC ships an update every 2 months, and 江证链 every 5 days. Most recently, 公证IDC was updated on October 24, 2026 and 江证链 on October 11, 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.*