# uDisk vs TC66C

The clearest difference is review sentiment: uDisk at 84% against TC66C's 33%. uDisk also leads on rating (4.3 vs 2.0) and ratings volume (247 vs 6). TC66C's advantage is in-app purchases (none vs 1) and iOS requirement (9.0 vs 11.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. uDisk sells 1 one-off in-app purchase. TC66C asks for nothing beyond the download.

uDisk holds the better App Store score, 4.3 against 2.0. That said, the two scores are not equally well evidenced: uDisk has 247 ratings behind it against 6, 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 33% of TC66C's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | uDisk | TC66C |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (247 ratings)](https://appshunter.io/ios/app/udisk/id532963658/reviews)** | [2.0 (6 ratings)](https://appshunter.io/ios/app/tc66c/id1445111707/reviews) |
| Number of ratings | **247** | 6 |
| Positive reviews | **83.8% of reviews** | 33.3% 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 | 37 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Brown Bear Technology Co., LTD](https://appshunter.io/developer/480204138) | [亮亮 刘](https://appshunter.io/developer/1439150212) |

## 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


### TC66C

[App page](https://appshunter.io/ios/app/tc66c/id1445111707)

Connect to a Type-C tester via Bluetooth to view and control its data. This utility app allows for real-time monitoring and management of tester functions directly from your device.

**Highlights:** Bluetooth connectivity, Type-C tester data display, Tester control functions, Real-time monitoring

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uDisk free?

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

### Is TC66C free?

TC66C is free to download, with no in-app purchases.

### Which has better reviews, uDisk or TC66C?

uDisk is rated higher. uDisk averages 4.3 out of 5 from 247 ratings, while TC66C averages 2.0 from 6 ratings.

### Do uDisk or TC66C have ads?

Neither uDisk nor TC66C shows ads.

### Which is updated more often, uDisk or TC66C?

uDisk ships an update every 2 months, and TC66C every 2 months. Most recently, uDisk was updated on October 19, 2026 and TC66C on October 16, 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.*