# DUO LINK 4 vs Mobile Reader 3.0

The clearest difference is review sentiment: DUO LINK 4 at 20% against Mobile Reader 3.0's 0%. Mobile Reader 3.0's advantage is iOS requirement (9.0 vs 11.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | DUO LINK 4 | Mobile Reader 3.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.1 (498 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews)** | — |
| Number of ratings | **498** | — |
| Positive reviews | **19.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Free | Free |
| Size | 123 MB | 93 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PNY](https://appshunter.io/developer/1103672386) | [骏 杨](https://appshunter.io/developer/1513725819) |

## 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


### Mobile Reader 3.0

[App page](https://appshunter.io/ios/app/mobile-reader-30/id6748439158)

This application connects to MFI storage devices via a data line. It allows users to view files on their mobile phones and back them up to the connected storage device.

**Highlights:** Connects to MFI storage devices, View mobile phone data files, Backup mobile phone files to storage, Data line 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 Mobile Reader 3.0 free?

Mobile Reader 3.0 is free to download, with no in-app purchases.

### Do DUO LINK 4 or Mobile Reader 3.0 have ads?

Neither DUO LINK 4 nor Mobile Reader 3.0 shows ads.

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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.*