# User Link vs 知小信

The clearest difference is in-app purchases: User Link at none against 知小信's 3. User Link also leads on update cadence (weekly vs every 6 weeks) and iOS requirement (13.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. 知小信 sells 3 one-off in-app purchases. User Link asks for nothing beyond the download.

User Link ships an update weekly, 知小信 every 6 weeks. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | User Link | 知小信 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Size | 98 MB | 20 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [天津谷川科技有限公司](https://appshunter.io/developer/919049440) | [Beijing Maoxintong Technology Co., Ltd.](https://appshunter.io/developer/1889750534) |

## What reviewers say

### User Link

[App page](https://appshunter.io/ios/app/user-link/id6752362616)

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

**In-app purchases:** none


### 知小信

[App page](https://appshunter.io/ios/app/id6761451091)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 基础版 | $59.99 | one-time |
| 专业版 | $199.99 | one-time |
| 旗舰版 | $249.99 | one-time |


## Frequently asked questions

### Is User Link free?

User Link is free to download, with no in-app purchases.

### Is 知小信 free?

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

### Do User Link or 知小信 have ads?

Neither User Link nor 知小信 shows ads.

### Which is updated more often, User Link or 知小信?

User Link ships an update weekly, and 知小信 every 6 weeks. Most recently, User Link was updated on October 9, 2026 and 知小信 on October 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.*