# I vs U8

The clearest difference is rating: I at 5.0 against U8's 4.0. I also leads on in-app purchases (none vs 1) and ads (none vs shown). U8's advantage is review sentiment (64% vs 50%). On price, ratings volume and device support there is nothing between them.

Both are free to download. U8 sells 1 one-off in-app purchase. I asks for nothing beyond the download.

I holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews complicate that: 50% of I's written reviews are positive against 64% of U8's, so the app with the better star average is not the one people write more warmly about.

I ships an update every 9 days, U8 every 6 weeks. The most recent releases landed on June 4, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | I | U8 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/i-usbkey-pro/id1258469579/reviews)** | [4.0 (9 ratings)](https://appshunter.io/ios/app/u8-disk/id1554732742/reviews) |
| Number of ratings | 5 | **9** |
| Positive reviews | 50.0% of reviews | **64.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 9 days** | Every 6 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 26 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [zhong qibiao](https://appshunter.io/developer/1118837284) | [ErxiangHeyi Information](https://appshunter.io/developer/1735695526) |

## What reviewers say

### I

[App page](https://appshunter.io/ios/app/i-usbkey-pro/id1258469579)

Manage all your files on iOS devices with ease. This app allows you to exchange files between different devices and platforms, back up contacts and camera roll, and play media directly from your device. It supports a wide range of document, image, audio, and video file formats.

**Highlights:** File management for iOS devices, Cross-device file exchange, Contact and camera roll backup, Video and music playback, Image and document preview, Support for various file formats

**Features:** macOS Compatibility

**In-app purchases:** none


### U8

[App page](https://appshunter.io/ios/app/u8-disk/id1554732742)

Transfer and back up any file wirelessly between your mobile devices and computers without using mobile data. Experience ultra-fast speeds for seamless file management and sharing across different platforms.

**Highlights:** Zero-flow wireless file transfer, Ultra-fast transmission speeds (up to 30MB/s), File backup and management, Cross-platform compatibility, Supports various file formats

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LifeTime | $3.99 | one-time |


## Frequently asked questions

### Is I free?

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

### Is U8 free?

U8 is free to download, with in-app purchases available.

### Which has better reviews, I or U8?

I is rated higher. I averages 5.0 out of 5 from 5 ratings, while U8 averages 4.0 from 9 ratings.

### Do I or U8 have ads?

U8 shows ads; I does not.

### Which is updated more often, I or U8?

I ships an update every 9 days, and U8 every 6 weeks. Most recently, I was updated on June 4, 2026 and U8 on September 17, 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.*