# Sec MQTT Pub vs Dukto Link

The clearest difference is update cadence: Dukto Link at every 3 weeks against Sec MQTT Pub's every 28 months. Sec MQTT Pub's advantage is iOS requirement (14.0 vs 16.2). On price, ads, in-app purchases and device support there is nothing between them.

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

Sec MQTT Pub ships an update every 28 months, Dukto Link every 3 weeks. The most recent releases landed on November 3, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Sec MQTT Pub | Dukto Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sec-mqtt-pub/id1554992163/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 3 MB | 3 MB |
| Requires iOS | **14.0** | 16.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Care Active Corp.](https://appshunter.io/developer/1739001802) | [Gorjan Shukov](https://appshunter.io/developer/1190987662) |

## What reviewers say

### Sec MQTT Pub

[App page](https://appshunter.io/ios/app/sec-mqtt-pub/id1554992163)

This app provides a secure MQTT client for communicating with IoT devices using X.509 authentication and AES-128 encryption. It allows for customized messages and topics, offering a robust solution for secure IoT project communication.

**Highlights:** X.509 authentication, Root CA authentication support, AES-128 encryption, Face ID / Touch ID support, Customizable buttons for messages and topics, Open-source project

**In-app purchases:** none


### Dukto Link

[App page](https://appshunter.io/ios/app/dukto-link/id6797087331)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sec MQTT Pub free?

Sec MQTT Pub is free to download, with no in-app purchases.

### Is Dukto Link free?

Dukto Link is free to download, with no in-app purchases.

### Do Sec MQTT Pub or Dukto Link have ads?

Neither Sec MQTT Pub nor Dukto Link shows ads.

### Which is updated more often, Sec MQTT Pub or Dukto Link?

Sec MQTT Pub ships an update every 28 months, and Dukto Link every 3 weeks. Most recently, Sec MQTT Pub was updated on November 3, 2026 and Dukto Link on October 29, 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.*