DUO LINK 4 vs Harvest Right
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 .
Harvest Right
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.
- Remote freeze dryer monitoring
- Batch progress tracking
- Configurable app alerts
- Personalize freeze drying experience
- Access freeze drying tips and recipes
- Direct customer support access
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The Harvest Right App gives you direct access to your Harvest Right freeze dryer. Key features: Ability to easily set up a new freeze dryer so you can start using it without delay. Monitoring your freeze dryer's progress throughout the batch from anywhere through Wi-Fi *. Account sharing feature that allows others to monitor your freeze dryer.* Configurable app alerts that will instantly notify of batch progress so you can keep your freeze dryer running.* Ability to personalize your freeze drying experience including display name and screen color.* Instant access to Harvest Right’s freeze drying tips and tricks and the ability to personalize with your own recipes and settings. Ability to quickly start a batch based on the food being freeze dried. Receive instant alerts if your batch experiences any issue as well as direct feedback on how to keep your freeze dryer running.* Direct access to Harvest Right's customer support team, including the option to grant your support agent access to your freeze dryer for instant assistance.* * Requires Harvest Right WiFi Accessory
Screenshots
Verdict
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.
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.
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.
| Parameter | DUO LINK 4 | Harvest Right |
|---|---|---|
| Price | Free | Free |
| Rating | 2.1 (513 ratings) | 4.7 (2.6K ratings) — better |
| Positive reviews | 19.8% of reviews | 58.2% of reviews — better |
| Number of ratings | 513 | 2.6K — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 123 MB | 36 MB |
| Age rating | 4+ | 4+ |
| Developer | PNY | Harvest Right LLC |
Customer experience
DUO LINK 4
Harvest Right
User reviews
DUO LINK 4
From 513 App Store ratingsWhat we love
- 🚀 Efficient file transfer
- 💡 Useful for freeing up phone storage
- 👍 Straightforward to use
Room to improve
- 🐛 Frequent app crashes
- 🔍 Confusing or limited UI
- 🔌 Compatibility issues with newer devices
- 💾 Data loss or corruption
Harvest Right
From 2.6K App Store ratingsWhat we love
- 🚀 Freeze drying with WiFi dongle
- 💡 Stores batch information
- 👍 Great resource with frequent updates
- 👍 Convenient app with many features
Room to improve
- 🐛 WiFi dongle connection issues
- 🐛 Keyboard glitches
- 🔒 Difficult to create/login to account
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
Harvest Right
Reported bugs
3 issues- Unable to register devices
- Inability to connect to WiFi
- Verification emails not received
Requested features
3 requests- Add more food/candy options
- Add personal notes section
- Ability to control freeze dryer from app
In-app purchases
DUO LINK 4
No in-app purchases
Harvest Right
No in-app purchases









