U vs Y
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
U
Expand your iOS device's storage with this portable flash drive. Seamlessly transfer, view, and manage files between your iPhone/iPad and Mac/PC without needing Wi-Fi or a network signal. Features include file encryption and contact backup.
- Memory expansion for iOS devices
- Two-way storage transfer (iOS to Mac/PC)
- No Wi-Fi or network signal required
- Transfer, view, and share files
- File encryption
- Contacts backup and restore
- Video streaming via Airplay
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The U-Disk is the ultimate solution for memory expansion on iOS device. It's provides two-way storage between iOS and MAC/PC without Wi-Fi, network signal or battery power. Compatible with virtually all devices featuring a Lightning connector, this ultra-slim and fast flash drive enables users to seamlessly transfer, view and share documents, images, video and audio files between a multitude of gadgets. Organize, edit and manage files across multiple platforms, including iPad, iPhone and more. Play music and videos directly from the freeing up space on your devices. Other features include file encryption, contacts backup-restore, and video streaming via Airplay, Whether traveling by airplane for a business trip, stuck in a remote location without reception, or wanting to share photos and videos of a recent vacation, U-Disk fits perfectly into any lifestyle.
Y
Manage files on a USB drive directly from your iPhone. Back up photos and contacts, save media taken on your phone to the USB, and play content from the drive on your device. Expand your iPhone's storage capacity easily.
- USB disk management for iPhone
- Back up photos and contacts
- Save photos/videos directly to USB
- Play media from USB on iPhone
- View classified folders
- File management and search
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Y-Disk Designed for you! Y-Disk is the management software for USB disk made for iPhone. With Y-Dish APP, you can back up your photos and contacts from your iPhone easily. Also, your pictures and video taken by the iPhone can be saved to the USB disk directly. And your pictures, video and music saved in the USB Disk can also be played at the iPhone. The limited capacity of the phone is not a problem to you. Functions of the Y-Disk: 1, View classified folders. While check in the APP, you can find the photos, videos, music and folders from your phone or USB Disk. Y-Disk can support different files in different format, like pictures in gif, videos in mkv, audio in m4a, word, PPT ect. 2, File management With Y-Disk APP, you can management your folders from USB Disk. Also, the APP can support different file arrangement and quick search of your folders, so that you can find what you need quickly. Y-Dish App will be the useful tools to your work. 3, Save pictures taken by phone direct in your USB Disk. With Y-Disk App, you can save pictures and video taken by phone, without taken your phone capacity. You can take pictures and videos at any time, even if your phone capacity is limited. 4, Back up photos and contacts With Y-disk App, you can back up your precious photos and contact lists even if insufficient storage space in iCloud. This is safe with your privacy. All your dates are under double protection with our USB Disk.
Screenshots
Verdict
The clearest difference is ratings volume: Y at 1.7K against U's 17. Y also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (8.0 vs 12.1). U's advantage is rating (2.3 vs 2.0) and review sentiment (29% vs 9%). 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.
U holds the better App Store score, 2.3 against 2.0. That said, the two scores are not equally well evidenced: Y has 1.7K ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 29% of U's written reviews are positive against 9% of Y's.
U ships an update every 3 months, Y every 3 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | U | Y |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (17 ratings) — better | 2.0 (1.7K ratings) |
| Positive reviews | 29.4% of reviews — better | 9.0% of reviews |
| Number of ratings | 17 | 1.7K — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.1 | 8.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | 岚 丁 | Shenzhen Dianzhui Culture Technology Co., Ltd. |
Customer experience
U
Y
Bugs and requests
U
Not enough reviews yet to summarise bugs or requests.
Y
Reported bugs
3 issues- App not recognizing USB drive
- Corrupted or missing files after transfer
- Incorrect date/time stamps on transferred files
Requested features
4 requests- Add option to select multiple files at once
- Improve video playback functionality
- Provide better support for file formats and codecs
- Allow customization of file/folder structure
In-app purchases
U
No in-app purchases
Y
No in-app purchases







