# DUO LINK 4 vs Energizer Connect

The clearest difference is rating: Energizer Connect at 4.7 against DUO LINK 4's 2.1. Energizer Connect also leads on review sentiment (36% vs 20%) and ratings volume (9.6K vs 513). DUO LINK 4's advantage is iOS requirement (11.0 vs 14.0). On price, update cadence, 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.

Energizer Connect holds the better App Store score, 4.7 against 2.1. That said, the two scores are not equally well evidenced: Energizer Connect has 9.6K 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 36% of Energizer Connect's.

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

## The numbers

| Metric | DUO LINK 4 | Energizer Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (513 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews) | **[4.7 (9.6K ratings)](https://appshunter.io/ios/app/energizer-connect/id1362829750/reviews)** |
| Number of ratings | 513 | **9.6K** |
| Positive reviews | 19.8% of reviews | **35.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free | Free |
| Size | 123 MB | 283 MB |
| Requires iOS | **11.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [PNY](https://appshunter.io/developer/1103672386) | [Energizer Connect](https://appshunter.io/developer/1362829749) |

## 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


### Energizer Connect

[App page](https://appshunter.io/ios/app/energizer-connect/id1362829750)

Control your smart home devices with ease from your smartphone. Manage multiple homes, rooms, and devices with intuitive controls, custom alerts, and automated schedules. Share access with family members for seamless home management.

**Highlights:** Plug-and-play device control, Multi-home and room profiles, Customizable alerts, Automated schedules and scenes, Device sharing with family, In-app live chat support

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Affordable price
- 🚀 Convenient and easy to use
- 🔒 Reliable and secure
- ✨ Affordable and worth the money

**What reviewers complain about**

- 🐛 Unstable app with bugs and glitches
- 🤖 Poor customer support and unresponsive developers
- 📶 Connectivity issues and unreliable connections
- 🤯 Complicated setup and configuration process
- 🔍 Limited features and functionality

**Reported bugs**

- Camera image distortion and half-screen issues
- Frequent app crashes and freezes
- Devices randomly going offline and unable to reconnect
- Compatibility issues with newer iOS and Android versions

**Requested features**

- Add remote reset option for cameras
- Improve video playback and review capabilities
- Integrate with popular smart home platforms
- Provide clearer instructions and documentation
- Enhance app UI and user experience


## Frequently asked questions

### Is DUO LINK 4 free?

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

### Is Energizer Connect free?

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

### Which has better reviews, DUO LINK 4 or Energizer Connect?

Energizer Connect is rated higher. DUO LINK 4 averages 2.1 out of 5 from 513 ratings, while Energizer Connect averages 4.7 from 9.6K ratings.

### Do DUO LINK 4 or Energizer Connect have ads?

Neither DUO LINK 4 nor Energizer Connect shows ads.

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

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