# Sec MQTT Pub vs MQTTCP

The clearest difference is in-app purchases: Sec MQTT Pub at none against MQTTCP's 3. Sec MQTT Pub also leads on iOS requirement (14.0 vs 18.2). MQTTCP's advantage is update cadence (every 7 months vs every 28 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. MQTTCP sells 3 in-app purchases, starting at $0.99 per month. Sec MQTT Pub asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Sec MQTT Pub against 5.0 for MQTTCP. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Sec MQTT Pub ships an update every 28 months, MQTTCP every 7 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Sec MQTT Pub | MQTTCP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/sec-mqtt-pub/id1554992163/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/mqttcp/id6743165443/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 7 months** |
| Monetization | **Free** | Freemium |
| Size | 3 MB | 4 MB |
| Requires iOS | **14.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Care Active Corp.](https://appshunter.io/developer/1739001802) | [xiao zhang](https://appshunter.io/developer/1086950190) |

## 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


### MQTTCP

[App page](https://appshunter.io/ios/app/mqttcp/id6743165443)

This app facilitates communication with MQTT, TCP, and UDP services. It offers features for publishing and subscribing to messages, connecting to TCP servers, and managing UDP listeners, all within a clean interface.

**Highlights:** MQTT publish/subscribe, TCP client/server functionality, UDP listener, Username/password authentication, Message history tracking, Hexadecimal data visualization

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $1.99 | per year |
| One-time Purchase | $2.99 | one-time |


## Frequently asked questions

### Is Sec MQTT Pub free?

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

### Is MQTTCP free?

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

### Which has better reviews, Sec MQTT Pub or MQTTCP?

Sec MQTT Pub and MQTTCP are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Sec MQTT Pub or MQTTCP have ads?

Neither Sec MQTT Pub nor MQTTCP shows ads.

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

Sec MQTT Pub ships an update every 28 months, and MQTTCP every 7 months. Most recently, Sec MQTT Pub was updated on November 3, 2026 and MQTTCP on October 30, 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.*