Sec MQTT Pub vs Sub
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sec MQTT Pub
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.
- X.509 authentication
- Root CA authentication support
- AES-128 encryption
- Face ID / Touch ID support
- Customizable buttons for messages and topics
- Open-source project
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TLS IoT is an open-source end-to-end secured MQTTs client to communicate with your IoT device securely. The client supports the following features: • Use only X.509 to authenticate and secure the communication • Support Root CA authentication • AES-128 encryption to prevent the middle-man attack • Support Face ID / Touch ID You can define up to 4 buttons with customized messages and topics. TLS IoT tool is a secured and easy-to-use app. If you are looking for a highly secured MQTT tool for your IoT project, this app is for you. For more information about this project, including the source code and demos, please visit our project site: https://github.com/tracmo/open-tls-iot-client
Sub
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Sub-Connect mobile app helps in monitoring and measuring in real-time the temperature, humidity, energy, and other sensor values, output status, faults, and setPoint control operations for various connected devices. Receive timely alerts for excursions and incursions when assets go out of threshold, enabling you to take precautionary and necessary measures to safely preserve products in cold storages/rooms. Salient Features: Boost your business and achieve peace of mind with "Alerts & Notifications" on the go. Scheduled Reports & Analytics to assist management in informed decision-making. Sub-Connect is a proactive cloud-hosted platform that supports any Modbus-based Sub-zero controller. Dependable, reliable, and trusted Data Loggers for recording and presenting accurate data. Set custom rules as per your business needs and assign them to designated users or roles. Effortless performance tracking and data access for multiple assets by multiple users. Track your device status in real-time with alerts, SMS, and emails accessible anytime, anywhere. Contact us for controller compatibility.
Screenshots
Verdict
The clearest difference is update cadence: Sub at fortnightly against Sec MQTT Pub's every 28 months. On price, ads, in-app purchases and device support 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.
Sec MQTT Pub ships an update every 28 months, Sub fortnightly. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.
| Parameter | Sec MQTT Pub | Sub |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 28 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 14.0 |
| Further details — not scored | ||
| Size | 3 MB | 43 MB |
| Age rating | 4+ | 4+ |
| Developer | Care Active Corp. | PVR Controls |
In-app purchases
Sec MQTT Pub
No in-app purchases
Sub
No in-app purchases









