# DUO vs Usb Transfer

The clearest difference is in-app purchases: DUO at none against Usb Transfer's 3. DUO also leads on iOS requirement (8.0 vs 12.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Usb Transfer sells 3 in-app purchases, starting at $2.99 per month. DUO asks for nothing beyond the download.

DUO ships an update every 5 weeks, Usb Transfer every 3 weeks. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | DUO | Usb Transfer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.9 (52 ratings)](https://appshunter.io/ios/app/duo-link/id982410478/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 12.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 31 MB | 91 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Gopod Group Limited](https://appshunter.io/developer/975108489) | [Changsha Fugui Bamboo Network Technology Co., Ltd.](https://appshunter.io/developer/1458061020) |

## What reviewers say

### DUO

[App page](https://appshunter.io/ios/app/duo-link/id982410478)

Expand storage for your Apple devices and computers. Easily transfer files, back up contacts, and play media directly from the device. Free up space on your iPhone and iPad with this versatile storage solution.

**Highlights:** Expand iPhone/iPad storage, USB and Lightning connectors, Contact backup and restore, Independent music/video playback, Stream 1080p videos, File management

**Features:** macOS Compatibility

**In-app purchases:** none


### Usb Transfer

[App page](https://appshunter.io/ios/app/usb-transfer/id6504265361)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $2.99 | per month |
| 季会员 | $3.99 | per 3 months |
| 年会员 | $9.99 | per year |


## Frequently asked questions

### Is DUO free?

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

### Is Usb Transfer free?

Usb Transfer is free to download, with in-app purchases available.

### Do DUO or Usb Transfer have ads?

Neither DUO nor Usb Transfer shows ads.

### Which is updated more often, DUO or Usb Transfer?

DUO ships an update every 5 weeks, and Usb Transfer every 3 weeks. Most recently, DUO was updated on October 15, 2026 and Usb Transfer on October 2, 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.*