Comparison

DUO vs Usb Transfer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DUO

This multi-functional storage device offers a dual connector for seamless file transfer and management between Apple devices and computers. It allows for backing up contacts, streaming high-definition videos, and managing files directly from the device.

Highlights
  • Dual USB and Lightning connectors
  • Contact backup and restore
  • Independent music and video playback
  • 1080p video streaming
  • File management (copy, delete, export)
  • Browse external and local files
Features
Read full description

DUO-LINK 3 is a multi-functional storage device for Mac, PC, iPad, iPhone, and iPod touch. DUO-LINK 3 has a standard USB interface and a lightning connector for iPhone and iPad. Free up space on your iPhone and iPad. Transfer and share files between your iPhone, iPad & Mac or PC quickly and easily. DUO-LINK 3 Functions: ● Contact list backup and restore. ● Supports independent music and video playback. ● Stream 1080p videos directly from DUO-LINK 3. ● File management operations such as copy, delete, export etc. ● Browse files store on DUO-LINK 3 Drive. ● Browse local files stored within DUO-LINK 3 App. ● Transfer media and files from iPhone to DUO-LINK 3 Drive. Compatibility: ● IOS 9 and older versions. Compatible with : iPhone 6 Plus, iPad 4th Generation and older devices. ● PCs running Windows XP, Windows 7, and Windows 8. ● Mac computers running Mac OS 10.5 or later.

About

Usb Transfer

Features
Read full description

USB Transfer-Phone File – Your on-the-go transfer assistant Direct web transmission supports multi-person collaboration, mobile phone turns into a USB flash drive in seconds to achieve free transmission across devices, encrypted transmission, local transmission, privacy and security, batch sharing and intelligent file management, comprehensively improving efficiency and convenience. --Highlights-- 1. Direct web transmission, minimalist operation: no need to install software or log in to the account, you can use it by opening the browser, and the operation is simple and fast. 2. Mobile phone turns into a USB flash drive in seconds: transfer files through your mobile phone anytime, anywhere, break device restrictions, and make file sharing more free. 3. Browser web transfer: Upload and download files directly through the web page, say goodbye to cumbersome software installation. 4. Online preview: Support online preview of files, you can view the content without downloading, saving time and traffic. 5. One-time sharing of multiple files: Support batch upload and share of multiple files to improve transfer efficiency. 6. File classification management: Intelligently classify files, easy to find and manage, and keep documents organized. 7. Security guarantee: support encrypted transmission and LAN operation, higher privacy. The webpage is temporarily authorized to log in, no need to log in to any account, and there is no need to worry about account theft or privacy leakage in unfamiliar environments. Terms of Use: https://cms.fuguizhukj.cn/article/detail/usbiosgnzdxfxy.html Privacy Policy: https://cms.fuguizhukj.cn/article/detail/cyupgggnyszc.html USB Transfer-Phone File, redefines the way files are transferred, providing you with a more convenient and efficient file sharing experience!

Screenshots

DUO4 screens
Usb Transfer4 screens

Verdict

The call

The clearest difference is in-app purchases: DUO at none against Usb Transfer's 3. DUO also leads on iOS requirement (8.0 vs 13.0). Usb Transfer's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Usb Transfer sells 3 in-app purchases, starting at $2.99 per month. DUO asks for nothing beyond the download.

UpkeepUpdate frequency

DUO ships an update every 3 months, Usb Transfer every 3 weeks. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
DUO versus Usb Transfer: the parameters behind the verdict, then further details
ParameterDUOUsb Transfer
PriceFreeFree
Rating2.5 (86 ratings) — better—
Positive reviews17.5% of reviews—
Number of ratings86 — better—
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS8.0 — better13.0
Further details — not scored
Size34 MB89 MB
Age rating4+17+
DeveloperGopod Group LimitedChangsha Fugui Bamboo Network Technology Co., Ltd.

Bugs and requests

DUO

Reported bugs

21 issues
  • App crashes when playing MP3 files
  • App crashes when transferring large files
  • App crashes when viewing videos
  • App crashes when adjusting volume during video playback
  • App crashes when copying photos
Show 16 more
  • App crashes after 15-20 seconds of use
  • Cannot recognize iPhone 8, iPhone X, iPhone 14, iPhone 16 Pro
  • Hardware not detected despite proper connection
  • Files show as transferred but remain on device
  • Duplicate file errors during transfer
  • File names corrupted with special characters
  • Cannot delete files after transfer
  • App closes when opening audio files
  • Cannot access audio files after update
  • App bloats to 1-2GB after initial use
  • Incompatible with iOS 11 and later versions
  • LED light not activating on connection
  • Chinese language files appearing unexpectedly
  • Cannot read flash drive after disconnect/reconnect
  • File transfer progress not completing despite appearing to work
  • Photos not visible in app despite being on device

Requested features

15 requests
  • Video thumbnail preview functionality
  • File sharing with other applications
  • Password/file locking capability
  • Ability to select multiple files in view mode
  • Wireless streaming to Apple TV
Show 10 more
  • Root folder naming per device
  • Ability to rename files on iPhone
  • Create folders and organize files
  • App storage on external drive
  • Better PDF reader for stored files
  • Fast forward/rewind for audio/video
  • Playback resume from last location
  • Bookmark functionality for media
  • Live photo support
  • Document transfer capability

Usb Transfer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

DUO

No in-app purchases

3 purchases

Usb Transfer

Subscriptions3
  • 月会员$2.991 Month
  • 季会员$3.993 Months
  • 年会员$9.991 Year

Questions

Is DUO free?
DUO is free to download, with no in-app purchases.
Is Usb Transfer free?
Usb Transfer is free to download, with in-app purchases available.
Do DUO or Usb Transfer have ads?
Neither DUO nor Usb Transfer shows ads.
Which is updated more often, DUO or Usb Transfer?
DUO ships an update every 3 months, and Usb Transfer every 3 weeks. Most recently, DUO was updated on October 21, 2026 and Usb Transfer on October 24, 2026.

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