# uDisk vs OTG Flash Pro

The clearest difference is in-app purchases: OTG Flash Pro at none against uDisk's 1. OTG Flash Pro also leads on update cadence (every 10 days vs every 2 months). uDisk's advantage is iOS requirement (11.0 vs 14.0). On price, ads and device support there is nothing between them.

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

uDisk ships an update every 2 months, OTG Flash Pro every 10 days. The most recent releases landed on September 25, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | uDisk | OTG Flash Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (233 ratings)](https://appshunter.io/ios/app/udisk/id532963658/reviews)** | — |
| Number of ratings | **233** | — |
| Positive reviews | 83.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 20 MB | 136 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Brown Bear Technology Co., LTD](https://appshunter.io/developer/480204138) | [裕雨 程](https://appshunter.io/developer/1079877476) |

## 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


### OTG Flash Pro

[App page](https://appshunter.io/ios/app/otg-flash-pro/id6752880818)

**In-app purchases:** none


## Frequently asked questions

### Is uDisk free?

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

### Is OTG Flash Pro free?

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

### Do uDisk or OTG Flash Pro have ads?

Neither uDisk nor OTG Flash Pro shows ads.

### Which is updated more often, uDisk or OTG Flash Pro?

uDisk ships an update every 2 months, and OTG Flash Pro every 10 days. Most recently, uDisk was updated on September 25, 2026 and OTG Flash Pro on September 12, 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.*