# Ulink（自建） vs 安全口令

The clearest difference is update cadence: Ulink（自建） at monthly against 安全口令's every 3 months. 安全口令's advantage is iOS requirement (9.0 vs 15). 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.

Ulink（自建） ships an update monthly, 安全口令 every 3 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Ulink（自建） | 安全口令 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Size | 128 MB | 7 MB |
| Requires iOS | 15 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ECCOM](https://appshunter.io/developer/1091864767) | [北京芯盾时代科技有限公司](https://appshunter.io/developer/1305542379) |

## What reviewers say

### Ulink（自建）

[App page](https://appshunter.io/ios/app/ulink/id1505467942)

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

**In-app purchases:** none


### 安全口令

[App page](https://appshunter.io/ios/app/id1543819081)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ulink（自建） free?

Ulink（自建） is free to download, with no in-app purchases.

### Is 安全口令 free?

安全口令 is free to download, with no in-app purchases.

### Do Ulink（自建） or 安全口令 have ads?

Neither Ulink（自建） nor 安全口令 shows ads.

### Which is updated more often, Ulink（自建） or 安全口令?

Ulink（自建） ships an update monthly, and 安全口令 every 3 months. Most recently, Ulink（自建） was updated on October 13, 2026 and 安全口令 on October 4, 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.*