# 链存证 vs 雷眼

The clearest difference is in-app purchases: 链存证 at none against 雷眼's 1. 链存证 also leads on update cadence (every 2 months vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 雷眼 sells 1 one-off in-app purchase. 链存证 asks for nothing beyond the download.

链存证 ships an update every 2 months, 雷眼 every 5 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 链存证 | 雷眼 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Size | 93 MB | 34 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [福建中科星泰数据科技有限公司](https://appshunter.io/developer/1594139079) | [祥利 管](https://appshunter.io/developer/1553028619) |

## What reviewers say

### 链存证

[App page](https://appshunter.io/ios/app/id1635891559)

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

**In-app purchases:** none


### 雷眼

[App page](https://appshunter.io/ios/app/waf/id6753199010)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 正式版 | $3.99 | one-time |


## Frequently asked questions

### Is 链存证 free?

链存证 is free to download, with no in-app purchases.

### Is 雷眼 free?

雷眼 is free to download, with in-app purchases available.

### Do 链存证 or 雷眼 have ads?

Neither 链存证 nor 雷眼 shows ads.

### Which is updated more often, 链存证 or 雷眼?

链存证 ships an update every 2 months, and 雷眼 every 5 months. Most recently, 链存证 was updated on November 3, 2026 and 雷眼 on October 30, 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.*