# uDisk vs i4Flash

The clearest difference is review sentiment: uDisk at 84% against i4Flash's 5%. uDisk also leads on rating (4.3 vs 1.4) and ratings volume (233 vs 12). i4Flash's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. uDisk sells 1 one-off in-app purchase. i4Flash asks for nothing beyond the download.

uDisk holds the better App Store score, 4.3 against 1.4. That said, the two scores are not equally well evidenced: uDisk has 233 ratings behind it against 12, 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 5% of i4Flash's.

uDisk ships an update every 2 months, i4Flash every 2 weeks. The most recent releases landed on September 25, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | uDisk | i4Flash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (233 ratings)](https://appshunter.io/ios/app/udisk/id532963658/reviews)** | [1.4 (12 ratings)](https://appshunter.io/ios/app/i4flash/id1088761982/reviews) |
| Number of ratings | **233** | 12 |
| Positive reviews | **83.7% of reviews** | 4.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 20 MB | 145 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Brown Bear Technology Co., LTD](https://appshunter.io/developer/480204138) | [汉福 陈](https://appshunter.io/developer/1636423746) |

## 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


### i4Flash

[App page](https://appshunter.io/ios/app/i4flash/id1088761982)

Manage your media files with ease. This app allows you to view, organize, and share photos, music, and documents. It supports various file operations and playback features for a comprehensive media experience.

**Highlights:** Media thumbnail display (video, photo, music), List/thumbnail view with sharing, File operations: copy, cut, delete, create, rename, Local/storage data transmission, Photo slideshow mode, Music playback with artwork and repeat modes, Document support for various formats

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is uDisk free?

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

### Is i4Flash free?

i4Flash is free to download, with no in-app purchases.

### Which has better reviews, uDisk or i4Flash?

uDisk is rated higher. uDisk averages 4.3 out of 5 from 233 ratings, while i4Flash averages 1.4 from 12 ratings.

### Do uDisk or i4Flash have ads?

Neither uDisk nor i4Flash shows ads.

### Which is updated more often, uDisk or i4Flash?

uDisk ships an update every 2 months, and i4Flash every 2 weeks. Most recently, uDisk was updated on September 25, 2026 and i4Flash on September 13, 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.*