# IoT USB vs USB扩展屏

The clearest difference is in-app purchases: IoT USB at none against USB扩展屏's 1. IoT USB also leads on iOS requirement (9.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. USB扩展屏 sells 1 one-off in-app purchase. IoT USB asks for nothing beyond the download.

## The numbers

| Metric | IoT USB | USB扩展屏 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Size | 51 MB | 0 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APIDEED](https://appshunter.io/developer/1552360826) | [晓满 李](https://appshunter.io/developer/1515867430) |

## What reviewers say

### IoT USB

[App page](https://appshunter.io/ios/app/iot-usb/id1551923512)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is IoT USB free?

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

### Is USB扩展屏 free?

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

### Do IoT USB or USB扩展屏 have ads?

Neither IoT USB nor USB扩展屏 shows ads.

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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.*