# DUO LINK 4 vs GT

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.

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.

## The numbers

| Metric | DUO LINK 4 | GT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (498 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews) | **[4.1 (96 ratings)](https://appshunter.io/ios/app/gt-lite-smart-home/id1574435706/reviews)** |
| Number of ratings | **498** | 96 |
| Positive reviews | 19.8% of reviews | **21.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Free | Free |
| Size | 123 MB | 140 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PNY](https://appshunter.io/developer/1103672386) | [GT Industrial Products. LLC](https://appshunter.io/developer/1574435708) |

## What reviewers say

### DUO LINK 4

[App page](https://appshunter.io/ios/app/duo-link-4/id1103672387)

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.

**Highlights:** Free up iPhone/iPad space, Charge iOS devices, Back up contacts, Transfer photos and videos, Store photos directly, Manage files, Music and video playback

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient file transfer
- 💡 Useful for freeing up phone storage
- 👍 Straightforward to use

**What reviewers complain about**

- 🐛 Frequent app crashes
- 🔍 Confusing or limited UI
- 🔌 Compatibility issues with newer devices
- 💾 Data loss or corruption

**Reported bugs**

- App fails to detect connected device
- Transferred files not visible or accessible
- Inconsistent behavior when renaming folders

**Requested features**

- Add 'select all' option for photos/files
- Support for more file formats
- Improve iPad app experience
- Integrate with native Files app


### GT

[App page](https://appshunter.io/ios/app/gt-lite-smart-home/id1574435706)

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.

**Highlights:** Remote appliance control, Simultaneous device management, Customizable timers, Family device sharing, Quick device connection

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DUO LINK 4 free?

DUO LINK 4 is free to download, with no in-app purchases.

### Is GT free?

GT is free to download, with no in-app purchases.

### Which has better reviews, DUO LINK 4 or GT?

GT is rated higher. DUO LINK 4 averages 2.1 out of 5 from 498 ratings, while GT averages 4.1 from 96 ratings.

### Do DUO LINK 4 or GT have ads?

Neither DUO LINK 4 nor GT shows ads.

### Which is updated more often, DUO LINK 4 or GT?

DUO LINK 4 ships an update every 2 months, and GT every 8 months. Most recently, DUO LINK 4 was updated on October 13, 2026 and GT on October 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*