iUSB Pro vs i4Flash
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iUSB Pro
Expand your Apple device's storage by backing up photos, videos, and contacts to an external device. Capture media directly to external storage and transfer files between devices, including non-Apple ones. Enjoy media stored on your external drive.
- Backup photos and videos
- Backup contacts
- Save media directly to external storage
- Transfer files between devices
- Play media from external storage
- Expand device storage
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This app will allow you to backup photos and contacts, transfer files, take pictures and videos without using internal storage and more. This app will ONLY work with the external backup device it was designed for. If you do not have that device, this app will not do anything. With this app you can: Backup all of your photos and videos with one tap, or select specific photos and videos to backup. Backup all of your contacts. Take pictures and record videos that save directly to your external device without using internal storage on your Apple device. Transfer photos and videos from other devices, including non-Apple devices, to your Apple device. Play movies and television shows saved on your external device. Save files to the external device or transfer files on to your Apple device. If you are looking for a way to expand the storage of your apple device, save the pictures and videos on your apple device, or transfer between devices using different operating systems, this app is the perfect solution. Once you have the recommended external storage device, download this app and get started!
i4Flash
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.
- 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
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•The main interface displays Media thumbnails :video, photo, music • Supports list / thumbnail view, support sharing operation for photos, music and documents • Support copy/cut/delete/create/rename operation and support local/Storage data transmission in /between • Support to play the photos by slideshow mode • Support music artwork shows, repeat mode setting, time line drag operation • Document: Support formats of .keynote、.numbers、.page、.xls/.xlsx, .doc/docx、pdf、txt、ppt/pptx
Screenshots
Verdict
The clearest difference is rating: iUSB Pro at 2.6 against i4Flash's 1.4. iUSB Pro also leads on ratings volume (1.1K vs 12) and review sentiment (14% vs 5%). i4Flash's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
iUSB Pro holds the better App Store score, 2.6 against 1.4. That said, the two scores are not equally well evidenced: iUSB Pro has 1.1K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 14% of iUSB Pro's written reviews are positive against 5% of i4Flash's.
iUSB Pro ships an update every 3 months, i4Flash every 2 weeks. The most recent releases landed on September 28, 2026 and September 13, 2026 respectively.
| Parameter | iUSB Pro | i4Flash |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (1.1K ratings) — better | 1.4 (12 ratings) |
| Positive reviews | 14.0% of reviews — better | 4.5% of reviews |
| Number of ratings | 1.1K — better | 12 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 | 9.0 |
| Further details — not scored | ||
| Size | 21 MB | 145 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Feitianxia Technology Co, Ltd. | 汉福 陈 |
Customer experience
iUSB Pro
i4Flash
Bugs and requests
iUSB Pro
Reported bugs
4 issues- Doesn't work on iOS 11 or iPhone 8/X
- Folders show as empty even when files are present
- Can't transfer large videos or lots of small files
- Corrupts SD card and makes it unusable
Requested features
4 requests- Add support for Files app on iOS 11
- Improve music playback features
- Add option to open multiple files at once
- Provide better file management tools
i4Flash
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iUSB Pro
No in-app purchases
i4Flash
No in-app purchases
