TwinCAT IoT Communicator vs MQTT
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TwinCAT IoT Communicator
Easily transmit process data from TwinCAT controllers to various devices, monitor status changes, and send information back to machines. This tool connects your controller to a messaging service for seamless communication between PLC and mobile operating systems.
- Transmit process data
- Monitor status changes
- Send information back to machine
- Connect TwinCAT controller to messaging service
- Publish-subscribe pattern integration
- Easy IT network integration
Read full descriptionHide full description
The TwinCAT 3 IoT Communicator ("TF6730") makes it possible to easily transmit process data to multiple end devices, monitor status changes and send information back to the machine. The TwinCAT 3 IoT Communicator connects the TwinCAT controller to a messaging service, making it easy to set it up within the TwinCAT engineering environment to send and receive messages between the PLC and mobile operating systems. Since the TwinCAT 3 IoT Communicator is based on the publish-subscribe pattern, it does not require any special firewall settings but can be easily integrated into an existing IT network. More information: http://www.beckhoff.com/TF6730 http://www.beckhoff.com/TF6735
MQTT
Read full descriptionHide full description
The app has a control range with the ability to control between zero and five lights and doors, depending on the use case. By means of a red-green indicator, the user is shown the connection status of the server. In the settings area of the app the server connection details can be entered. Depending on the use case, the controls for the lights or doors can be switched on and off. For the individual lights and doors, the corresponding theme as well as the message can be set. In addition, further settings for the transmission can be selected.
Screenshots
Verdict
The clearest difference is update cadence: TwinCAT IoT Communicator at every 2 months against MQTT's every 11 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.
TwinCAT IoT Communicator ships an update every 2 months, MQTT every 11 months. The most recent releases landed on August 10, 2026 and September 12, 2026 respectively.
| Parameter | TwinCAT IoT Communicator | MQTT |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 116 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Beckhoff Automation GmbH | Marco Gasser |
In-app purchases
TwinCAT IoT Communicator
No in-app purchases
MQTT
No in-app purchases









