# System 911 vs 玉龙云

The clearest difference is update cadence: System 911 at every 6 weeks against 玉龙云's every 3 months. 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.

System 911 ships an update every 6 weeks, 玉龙云 every 3 months. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | System 911 | 玉龙云 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Size | 29 MB | 277 MB |
| Requires iOS | 9 | 9.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [学新 黄](https://appshunter.io/developer/1450715299) | [Lijiang Yulong Snow Mountain Tourist Scenic Spot Information Center](https://appshunter.io/developer/1484441792) |

## What reviewers say

### System 911

[App page](https://appshunter.io/ios/app/system-911/id1497419202)

**Features:** macOS Compatibility

**In-app purchases:** none


### 玉龙云

[App page](https://appshunter.io/ios/app/id1510180166)

**In-app purchases:** none


## Frequently asked questions

### Is System 911 free?

System 911 is free to download, with no in-app purchases.

### Is 玉龙云 free?

玉龙云 is free to download, with no in-app purchases.

### Do System 911 or 玉龙云 have ads?

Neither System 911 nor 玉龙云 shows ads.

### Which is updated more often, System 911 or 玉龙云?

System 911 ships an update every 6 weeks, and 玉龙云 every 3 months. Most recently, System 911 was updated on November 3, 2026 and 玉龙云 on October 25, 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.*