MQTTool 4+

Brent Petit

Designed for iPad

    • 5.0 • 2 Ratings
    • Free



This is an MQTT client and test tool. MQTT is a machine-to-machine (M2M) messaging protocol commonly used for IoT applications. For more information on MQTT visit

MQTTool can connect to authenticated and unauthenticated MQTT brokers, subscribe to topics, and publish messages to topics.

I built this tool as i was doing my own MQTT investigations and I've posted it hoping others would find it useful too. I continue to use it on projects, and I'm continuing to look to improve this tool. If there are changes that would make this more useful, please send me feedback. Thanks!

What’s New

Version 2.6

MQTTool source has been released on GitHub.
See for more details.

This update includes some minor layout fixes.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

RobAl33 ,


Used this to test my local broker, this worked as expected and is easy to use and setup.

EWAF Fan ,

Does Need More Work

A nice tidy app visually, but for a paid app it needs more work. You cannot publish or subscribe multiple channels successfully and the app just seems to stop if you put it into background after a while. This means you cannot catch-up on subscription data if you move the app out of foreground.

App Privacy

The developer, Brent Petit, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.

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