# iUSB Pro vs USB

The clearest difference is review sentiment: USB at 75% against iUSB Pro's 14%. USB also leads on rating (4.2 vs 2.6) and update cadence (monthly vs every 3 months). iUSB Pro's advantage is ratings volume (1.1K vs 16) and iOS requirement (9.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

USB holds the better App Store score, 4.2 against 2.6. That said, the two scores are not equally well evidenced: iUSB Pro has 1.1K ratings behind it against 16, so its average is the more settled of the two. Written reviews point the same way: 14% of iUSB Pro's written reviews are positive against 75% of USB's.

iUSB Pro ships an update every 3 months, USB monthly. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | iUSB Pro | USB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (1.1K ratings)](https://appshunter.io/ios/app/iusb-pro/id1069615726/reviews) | **[4.2 (16 ratings)](https://appshunter.io/ios/app/usb-connect/id1563292212/reviews)** |
| Number of ratings | **1.1K** | 16 |
| Positive reviews | 14.0% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free | Free |
| Size | 21 MB | 74 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Feitianxia Technology Co, Ltd.](https://appshunter.io/developer/536103551) | [U.S. Boiler Company, LLC.](https://appshunter.io/developer/608292333) |

## What reviewers say

### iUSB Pro

[App page](https://appshunter.io/ios/app/iusb-pro/id1069615726)

Expand your Apple device's storage by backing up photos, videos, and contacts to an external device. Capture media directly to external storage and transfer files between devices, including non-Apple ones. Enjoy media stored on your external drive.

**Highlights:** Backup photos and videos, Backup contacts, Save media directly to external storage, Transfer files between devices, Play media from external storage, Expand device storage

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and useful
- 👍 Great app and connector
- 🚀 Smooth file transfer

**What reviewers complain about**

- 🐛 Crashes frequently
- 🐛 Doesn't recognize device
- 🐛 Glitchy and unreliable
- 🐛 Compatibility issues with newer iPhones
- 🐛 Crashes when saving to camera roll

**Reported bugs**

- Doesn't work on iOS 11 or iPhone 8/X
- Folders show as empty even when files are present
- Can't transfer large videos or lots of small files
- Corrupts SD card and makes it unusable

**Requested features**

- Add support for Files app on iOS 11
- Improve music playback features
- Add option to open multiple files at once
- Provide better file management tools


### USB

[App page](https://appshunter.io/ios/app/usb-connect/id1563292212)

This tool connects to U.S. Boiler modulating condensing boilers via a Bluetooth adapter for commissioning, diagnostics, and service. It offers wizards for startup and troubleshooting, data logging, and remote support capabilities through a web portal.

**Highlights:** Bluetooth connectivity to boilers, Commissioning, diagnostic, and service functions, Startup, troubleshoot, and service wizards, Cloud data logging and reporting, Remote support via web portal, Boiler firmware and parameter updates

**In-app purchases:** none


## Frequently asked questions

### Is iUSB Pro free?

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

### Is USB free?

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

### Which has better reviews, iUSB Pro or USB?

USB is rated higher. iUSB Pro averages 2.6 out of 5 from 1.1K ratings, while USB averages 4.2 from 16 ratings.

### Do iUSB Pro or USB have ads?

Neither iUSB Pro nor USB shows ads.

### Which is updated more often, iUSB Pro or USB?

iUSB Pro ships an update every 3 months, and USB monthly. Most recently, iUSB Pro was updated on September 24, 2026 and USB on September 8, 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.*