# USB vs Rotor

The clearest difference is price: USB at Free against Rotor's $2.99. USB also leads on iOS requirement (13.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

USB is free to download; Rotor costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

USB ships an update every 5 weeks, Rotor every 3 weeks. The most recent releases landed on October 15, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | USB | Rotor |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[2.0 (29 ratings)](https://appshunter.io/ios/app/usb-view/id1404195213/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 8 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [志强 童](https://appshunter.io/developer/1214909933) | [Matthew Mesropian](https://appshunter.io/developer/1854252282) |

## What reviewers say

### USB

[App page](https://appshunter.io/ios/app/usb-view/id1404195213)

This application connects to WIFI image transmission equipment, enabling wireless image data transfer between cameras and iOS devices. It allows for real-time, free transmission of visuals from anywhere, anytime.

**Highlights:** WIFI image transmission, Wireless connection to iOS devices, Real-time image data transfer, Anytime, anywhere access, Free wireless transmission

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

**In-app purchases:** none


### Rotor

[App page](https://appshunter.io/ios/app/rotor-vibration-analyzer/id6799832780)

**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 Rotor free?

Rotor costs $2.99, with no in-app purchases.

### Do USB or Rotor have ads?

Neither USB nor Rotor shows ads.

### Which is updated more often, USB or Rotor?

USB ships an update every 5 weeks, and Rotor every 3 weeks. Most recently, USB was updated on October 15, 2026 and Rotor on October 26, 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.*