# USB扩展屏 vs 壁纸库

USB扩展屏 and 壁纸库 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. USB扩展屏 sells 1 one-off in-app purchase and 壁纸库 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | USB扩展屏 | 壁纸库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 0 MB | 44 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [晓满 李](https://appshunter.io/developer/1515867430) | [泽阳 陈](https://appshunter.io/developer/1895843077) |

## What reviewers say

### USB扩展屏

[App page](https://appshunter.io/ios/app/usb/id6502822709)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 完整版 | $0.99 | one-time |


### 壁纸库

[App page](https://appshunter.io/ios/app/4k/id6766078885)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $6.99 | one-time |
| 年会员 | $19.99 | one-time |


## Frequently asked questions

### Is USB扩展屏 free?

USB扩展屏 is free to download, with in-app purchases available.

### Is 壁纸库 free?

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

### Do USB扩展屏 or 壁纸库 have ads?

Neither USB扩展屏 nor 壁纸库 shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*