# USB vs 衛星雲

The clearest difference is update cadence: USB at every 3 months against 衛星雲's every 14 months. USB also leads on iOS requirement (13.0 vs 15.0). 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.

USB ships an update every 3 months, 衛星雲 every 14 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | USB | 衛星雲 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 14 months |
| Size | 201 MB | 49 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Merry-Link Co.,Ltd.](https://appshunter.io/developer/1040729128) | [Chienhui Wu](https://appshunter.io/developer/874328045) |

## What reviewers say

### USB

[App page](https://appshunter.io/ios/app/usb-921/id1539400908)

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

**In-app purchases:** none


### 衛星雲

[App page](https://appshunter.io/ios/app/id6514298729)

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

**In-app purchases:** none


## Frequently asked questions

### Is USB free?

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

### Is 衛星雲 free?

衛星雲 is free to download, with no in-app purchases.

### Do USB or 衛星雲 have ads?

Neither USB nor 衛星雲 shows ads.

### Which is updated more often, USB or 衛星雲?

USB ships an update every 3 months, and 衛星雲 every 14 months. Most recently, USB was updated on November 3, 2026 and 衛星雲 on November 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.*