# uDisk vs TetherX

The clearest difference is rating: TetherX at 5.0 against uDisk's 4.3. TetherX also leads on in-app purchases (none vs 1). uDisk's advantage is ratings volume (233 vs 3) and iOS requirement (11.0 vs 18.4). On price, review sentiment, update cadence and ads there is nothing between them.

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

TetherX holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: uDisk has 233 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 84% of uDisk's written reviews are positive against 91% of TetherX's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | uDisk | TetherX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (233 ratings)](https://appshunter.io/ios/app/udisk/id532963658/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/tetherx/id1046299294/reviews)** |
| Number of ratings | **233** | 3 |
| Positive reviews | 83.7% of reviews | **90.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 3 MB |
| Requires iOS | **11.0** | 18.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Brown Bear Technology Co., LTD](https://appshunter.io/developer/480204138) | [Tether Technology Ltd](https://appshunter.io/developer/1046299293) |

## 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


### TetherX

[App page](https://appshunter.io/ios/app/tetherx/id1046299294)

This app provides unified monitoring and control of physical infrastructure, including video surveillance, access systems, and sensors. It offers real-time data, instant notifications, and secure management for professionals across various sites.

**Highlights:** Unified monitoring of video, sensors, and access, Real-time sensor data and environmental monitoring, Alarm status and instant push notifications, Access control management, Secure biometric authentication, Fast, native performance

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

**In-app purchases:** none


## Frequently asked questions

### Is uDisk free?

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

### Is TetherX free?

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

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

TetherX is rated higher. uDisk averages 4.3 out of 5 from 233 ratings, while TetherX averages 5.0 from 3 ratings.

### Do uDisk or TetherX have ads?

Neither uDisk nor TetherX shows ads.

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

uDisk ships an update every 2 months, and TetherX every 2 months. Most recently, uDisk was updated on September 17, 2026 and TetherX on September 19, 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.*