# uDisk vs DUO

The clearest difference is review sentiment: uDisk at 84% against DUO's 18%. uDisk also leads on rating (4.3 vs 2.5). DUO's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 11.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. uDisk sells 1 one-off in-app purchase. DUO asks for nothing beyond the download.

uDisk holds the better App Store score, 4.3 against 2.5. Both are backed by a comparable volume of ratings — 247 and 86 respectively. Written reviews point the same way: 84% of uDisk's written reviews are positive against 18% of DUO's.

uDisk ships an update every 2 months, DUO every 3 months. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | uDisk | DUO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (247 ratings)](https://appshunter.io/ios/app/udisk/id532963658/reviews)** | [2.5 (86 ratings)](https://appshunter.io/ios/app/duo-link-30/id1088185359/reviews) |
| Number of ratings | **247** | 86 |
| Positive reviews | **83.8% of reviews** | 17.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 34 MB |
| Requires iOS | 11.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Brown Bear Technology Co., LTD](https://appshunter.io/developer/480204138) | [Gopod Group Limited](https://appshunter.io/developer/975108489) |

## What reviewers say

### uDisk

[App page](https://appshunter.io/ios/app/udisk/id532963658)

Transform your iOS device into a portable USB drive. Easily transfer files between your device and computer via Wi-Fi or iTunes. Browse, play, and edit various file types directly on your phone or tablet.

**Highlights:** Use iOS device as USB disk, Wi-Fi file transfer, iTunes File Sharing, Browse various file types, Play music and video, Edit text files, Create directories and sort files

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $3.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast transfer
- 👍 Good for organizing files
- 👍 Useful for freeing up phone space
- 👍 Versatile and durable

**What reviewers complain about**

- 🐛 Does not work for some users
- 🐛 App requires download to each device
- 🐛 Cannot rotate screen
- 🐛 Does not work as a standalone flash drive
- 🐛 Limited file transfer capability

**Reported bugs**

- Cannot save files manually
- Material does not always show
- Does not work after initial use
- Cannot rotate screen
- Does not transfer videos from phone

**Requested features**

- App should be pre-loaded on the thumbdrive
- More clarity on app functionality and safety


### DUO

[App page](https://appshunter.io/ios/app/duo-link-30/id1088185359)

This multi-functional storage device offers a dual connector for seamless file transfer and management between Apple devices and computers. It allows for backing up contacts, streaming high-definition videos, and managing files directly from the device.

**Highlights:** Dual USB and Lightning connectors, Contact backup and restore, Independent music and video playback, 1080p video streaming, File management (copy, delete, export), Browse external and local files

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✅ Easy file transfer between devices
- 📱 Works with multiple iOS devices
- 🎵 Can store and play media files
- 💾 Provides additional storage capacity
- 🔄 Simple backup functionality for photos/videos

**What reviewers complain about**

- 🐛 Frequent app crashes and freezes
- ❌ Incompatible with newer iPhone models
- 📉 Poor app stability after updates
- 🔌 Hardware not recognized by app
- 💥 Data loss issues reported

**Reported bugs**

- App crashes when playing MP3 files
- App crashes when transferring large files
- App crashes when viewing videos
- App crashes when adjusting volume during video playback
- App crashes when copying photos

**Requested features**

- Video thumbnail preview functionality
- File sharing with other applications
- Password/file locking capability
- Ability to select multiple files in view mode
- Wireless streaming to Apple TV


## Frequently asked questions

### Is uDisk free?

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

### Is DUO free?

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

### Which has better reviews, uDisk or DUO?

uDisk is rated higher. uDisk averages 4.3 out of 5 from 247 ratings, while DUO averages 2.5 from 86 ratings.

### Do uDisk or DUO have ads?

Neither uDisk nor DUO shows ads.

### Which is updated more often, uDisk or DUO?

uDisk ships an update every 2 months, and DUO every 3 months. Most recently, uDisk was updated on October 23, 2026 and DUO on October 21, 2026.

---

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