# Zmodo vs DUO LINK 4

The clearest difference is in-app purchases: DUO LINK 4 at none against Zmodo's 10. DUO LINK 4 also leads on review sentiment (20% vs 7%) and iOS requirement (11.0 vs 15.1). Zmodo's advantage is update cadence (every 4 days vs every 2 months) and chart position (#59 vs unranked). On price, rating, ads and device support there is nothing between them.

Both are free to download. Zmodo sells 10 in-app purchases, starting at $4.99 per month. DUO LINK 4 asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 2.0 for Zmodo against 2.1 for DUO LINK 4. That said, the two scores are not equally well evidenced: Zmodo has 3.9K ratings behind it against 513, so its average is the more settled of the two. Written reviews are what separate them: 7% of Zmodo's written reviews are positive against 20% of DUO LINK 4's.

Zmodo ships an update every 4 days, DUO LINK 4 every 2 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Zmodo | DUO LINK 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3.9K ratings)](https://appshunter.io/ios/app/zmodo/id1020070571/reviews) | **[2.1 (513 ratings)](https://appshunter.io/ios/app/duo-link-4/id1103672387/reviews)** |
| Number of ratings | **3.9K** | 513 |
| Positive reviews | 7.4% of reviews | **19.8% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#59** | — |
| Size | 30 MB | 123 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EP Technology Corporation](https://appshunter.io/developer/543445690) | [PNY](https://appshunter.io/developer/1103672386) |

## What reviewers say

### Zmodo

[App page](https://appshunter.io/ios/app/zmodo/id1020070571)

**Currently charting:** #59 Top Grossing · Lifestyle (US App Store)

Control a variety of smart home products and connect with loved ones. Offers cloud services for enhanced connectivity and security. Manage your smart home devices remotely.

**Highlights:** Control smart home products, Seamless cloud service integration, Remote connectivity, Cloud service subscription options, Device management

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Cloud for 1 Device | $4.99 | per month |
| Platinum Cloud for 1 Device | $9.99 | per month |
| Premium Cloud for 2 Device | $9.99 | per month |
| Premium Cloud for 3 Device | $14.99 | per month |
| Platinum Cloud for 2 Device | $19.99 | per month |
| Premium Cloud for 4 Device | $19.99 | per month |
| Premium Cloud for 5 Device | $24.99 | per month |
| Premium Cloud for 6 Device | $29.99 | per month |
| Premium Cloud for 1 Device | $49.99 | per year |
| Premium Cloud for 2 Device | $99.99 | per year |

**What reviewers like**

- 🚀 Easy to set up
- 🔒 Decent security features
- 👍 Good value for money
- 👍 Reliable connection

**What reviewers complain about**

- 🐛 Frequent app crashes
- 🐛 Unreliable motion detection
- 🐛 Laggy and slow performance
- 🐛 Subscription required for full functionality
- 🐛 Poor customer support

**Reported bugs**

- App login issues after updates
- Inability to view recorded footage
- Cameras going offline randomly
- Time stamp issues on recorded videos

**Requested features**

- Landscape mode support
- Customizable notification sounds
- Faster video playback controls
- Improved video quality and consistency
- Remote camera reboot option


### 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


## Frequently asked questions

### Is Zmodo free?

Zmodo is free to download, with in-app purchases available.

### Is DUO LINK 4 free?

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

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

DUO LINK 4 is rated higher. Zmodo averages 2.0 out of 5 from 3.9K ratings, while DUO LINK 4 averages 2.1 from 513 ratings.

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

Neither Zmodo nor DUO LINK 4 shows ads.

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

Zmodo ships an update every 4 days, and DUO LINK 4 every 2 months. Most recently, Zmodo was updated on October 27, 2026 and DUO LINK 4 on October 24, 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.*