DUO LINK 4 vs GT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DUO LINK 4
Manage and transfer files between your iOS device and a USB flash drive. Free up storage, back up data, and even charge your device. Supports a wide range of file formats for seamless integration.
- Free up iPhone/iPad space
- Charge iOS devices
- Back up contacts
- Transfer photos and videos
- Store photos directly
- Manage files
- Music and video playback
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PNY DUO LINK 4 app, designed to work with DUO LINK OTG USB 3.0 Flash Drive brings you the ability to do more when it comes to file transfer, saving, sharing, accessing and streaming. Simply connect the DUO LINK OTG USB 3.0 Flash Drive to your iPhone and iPad and start syncing, transferring, sharing files, photos, videos and more with ease. DUO LINK OTG USB 3.0 is a flash drive designed for iPhone and iPad that enables you to free up space on your iOS device, save and protrect your contents into DUO LINK and even transfer then to your computer. DUO LINK OTG USB 3.0 also provides the ability for you to charge your iPhone and iPad. Features and Benefits: - Free up space on your iPhone or iPad. - Charge your iOS device. - Back-up your contacts. - Transfer and share your videos, photos and more. - Store photos directly into DUO LINK and save space on your iPhone or iPad. - Manage files on your iPhone, iPad and on DUO LINK. - Supports independent music and video playback. - Automatically back up your photos and videos so that you don't have to. Support: Please visit PNY Support at www.pny.com/support/technical-support Supported file formats: - video: M4V/MP4/MOV - Audio: M4A, CAF, AIFF, ASF, AAC, mp3, wav - Picture: TIFF, JPEG,JPG,PNG,GIF,BMP - Document: DOC, DOCX, PAGES, RTF, TXT , PPT, PPTX, PDF, XLS, XLSX, NUMBERS, KEY, HTML PNY takes no responsibility or liability with respect to the download or usage of DUO-LINK 4 app. By downloading this app you agree to the end user license agreement from PNY, also available at http://www.pny.com/File%20Library/Unassigned/PNY--On-the-Go-End-User-License-Agreement.pdf .
GT
Control your home appliances remotely from anywhere in the world. Manage multiple devices simultaneously, set timers for automated functions, and easily share access with family members for a connected living experience.
- Remote appliance control
- Simultaneous device management
- Customizable timers
- Family device sharing
- Quick device connection
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1. Remote control: control home appliances from anywhere 2. Simultaneously control: control multiple devices with one App 3. Timer: set timer to perform multiple functions 4. Device sharing: One tap to share devices among family members 5. Easy connection: easily and quickly connect App to devices
Screenshots
Verdict
The clearest difference is rating: GT at 4.1 against DUO LINK 4's 2.1. DUO LINK 4's advantage is update cadence (every 2 months vs every 8 months) and ratings volume (498 vs 96). On price, review sentiment, ads and in-app purchases 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.
GT holds the better App Store score, 4.1 against 2.1. That said, the two scores are not equally well evidenced: DUO LINK 4 has 498 ratings behind it against 96, so its average is the more settled of the two. Written reviews point the same way: 20% of DUO LINK 4's written reviews are positive against 21% of GT's.
DUO LINK 4 ships an update every 2 months, GT every 8 months. The most recent releases landed on October 13, 2026 and October 11, 2026 respectively.
| Parameter | DUO LINK 4 | GT |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (498 ratings) | 4.1 (96 ratings) — better |
| Positive reviews | 19.8% of reviews | 21.4% of reviews — better |
| Number of ratings | 498 — better | 96 |
| Update frequency | Every 2 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 123 MB | 140 MB |
| Age rating | 4+ | 4+ |
| Developer | PNY | GT Industrial Products. LLC |
Customer experience
DUO LINK 4
GT
Bugs and requests
DUO LINK 4
Reported bugs
3 issues- App fails to detect connected device
- Transferred files not visible or accessible
- Inconsistent behavior when renaming folders
Requested features
4 requests- Add 'select all' option for photos/files
- Support for more file formats
- Improve iPad app experience
- Integrate with native Files app
GT
Not enough reviews yet to summarise bugs or requests.
In-app purchases
DUO LINK 4
No in-app purchases
GT
No in-app purchases
Questions
Is DUO LINK 4 free?
Is GT free?
Which has better reviews, DUO LINK 4 or GT?
Do DUO LINK 4 or GT have ads?
Which is updated more often, DUO LINK 4 or GT?
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