I vs U8
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
I
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.
- 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
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The I-USBKey Pro is the best way to manage all your files on iOS devices,Exchanges files with different devices & platforms with ease. 1.Backup Contacts and Camera Roll. 2.Play Videos,Musics. 3.Preview Images,World. Supported File Formats: Document:DOC,XLS,PPT,TXT,else; Image:JPG,JPEG,BMP,GIF,else; Audio:MP3,AAC,AIF,else; Video:MP4,MOV,MKV,AVI,FLV,RMVB,ELSE;
U8
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.
- Zero-flow wireless file transfer
- Ultra-fast transmission speeds (up to 30MB/s)
- File backup and management
- Cross-platform compatibility
- Supports various file formats
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Mobile phone USB flash drive-file transfer and backup artifact Zero-flow transmission of any file, does not consume a trillion traffic, does not cost a penny. Mobile phone USB flash drive is a cross-platform, easy to operate, ultra-fast transmission speed of extremely fast file backup tools. You only need to transfer files in the same LAN through a computer browser -Software features- 1 free flow 2 File transfer speed is ultra-fast: kill Bluetooth 100 times, and the fastest speed can reach 30Mb/s. 3 Backup Files: You can browse and manage all formats supported by iOS and photos, videos, music and other files. 4 Cross-platform transmission: iOS mobile phones and other iOS mobile phones, and desktop device platforms, free transmission. 5 Powerful: Transmit photos, videos, music and other files in various formats in the same LAN. The function of mobile phone USB flash drive is small and powerful, which is a rare tool in your daily life. Come and try it quickly! ;
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | I | U8 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) — better | 4.0 (9 ratings) |
| Positive reviews | 50.0% of reviews | 64.3% of reviews — better |
| Number of ratings | 5 | 9 — better |
| Update frequency | Every 9 days — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 40 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | zhong qibiao | ErxiangHeyi Information |
Customer experience
I
U8
In-app purchases
I
No in-app purchases
U8
- LifeTime$3.99
