# DUO LINK 4 vs Harvest Right

The clearest difference is rating: Harvest Right at 4.7 against DUO LINK 4's 2.1. Harvest Right also leads on review sentiment (58% vs 20%) and update cadence (every 3 weeks vs every 2 months). DUO LINK 4's advantage is iOS requirement (11.0 vs 15.6). 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.

Harvest Right holds the better App Store score, 4.7 against 2.1. That said, the two scores are not equally well evidenced: Harvest Right has 2.6K ratings behind it against 513, 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 58% of Harvest Right's.

DUO LINK 4 ships an update every 2 months, Harvest Right every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | DUO LINK 4 | Harvest Right |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (513 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews) | **[4.7 (2.6K ratings)](https://appshunter.io/ios/app/harvest-right/id6450369953/reviews)** |
| Number of ratings | 513 | **2.6K** |
| Positive reviews | 19.8% of reviews | **58.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 123 MB | 36 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PNY](https://appshunter.io/developer/1103672386) | [Harvest Right LLC](https://appshunter.io/developer/1692958106) |

## 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


### Harvest Right

[App page](https://appshunter.io/ios/app/harvest-right/id6450369953)

Control and monitor your freeze dryer remotely. Set up new units, track batch progress, and receive alerts for any issues. Access tips, recipes, and customer support directly from your device.

**Highlights:** Remote freeze dryer monitoring, Batch progress tracking, Configurable app alerts, Personalize freeze drying experience, Access freeze drying tips and recipes, Direct customer support access

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Freeze drying with WiFi dongle
- 💡 Stores batch information
- 👍 Great resource with frequent updates
- 👍 Convenient app with many features

**What reviewers complain about**

- 🐛 WiFi dongle connection issues
- 🐛 Keyboard glitches
- 🔒 Difficult to create/login to account

**Reported bugs**

- Unable to register devices
- Inability to connect to WiFi
- Verification emails not received

**Requested features**

- Add more food/candy options
- Add personal notes section
- Ability to control freeze dryer from app


## Frequently asked questions

### Is DUO LINK 4 free?

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

### Is Harvest Right free?

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

### Which has better reviews, DUO LINK 4 or Harvest Right?

Harvest Right is rated higher. DUO LINK 4 averages 2.1 out of 5 from 513 ratings, while Harvest Right averages 4.7 from 2.6K ratings.

### Do DUO LINK 4 or Harvest Right have ads?

Neither DUO LINK 4 nor Harvest Right shows ads.

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

DUO LINK 4 ships an update every 2 months, and Harvest Right every 3 weeks. Most recently, DUO LINK 4 was updated on November 2, 2026 and Harvest Right on November 3, 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.*