# SIMATIC WinCC OA UI vs TwinCAT IoT Communicator

SIMATIC WinCC OA UI and TwinCAT IoT Communicator are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

On the App Store both sit at effectively the same score — 5.0 for SIMATIC WinCC OA UI against 5.0 for TwinCAT IoT Communicator. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 25, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SIMATIC WinCC OA UI | TwinCAT IoT Communicator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/simatic-wincc-oa-ui/id1073943068/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/twincat-iot-communicator/id1113995901/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 70 MB | 116 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siemens AG](https://appshunter.io/developer/394503271) | [Beckhoff Automation GmbH](https://appshunter.io/developer/859883375) |

## What reviewers say

### SIMATIC WinCC OA UI

[App page](https://appshunter.io/ios/app/simatic-wincc-oa-ui/id1073943068)

Monitor and control your SIMATIC WinCC OA plant remotely from your smartphone or tablet. Access the same powerful functionality as the desktop interface, ensuring secure and reliable real-time operation from anywhere.

**Highlights:** Remote plant monitoring, Real-time control, Multiple system connections, Secure data transmission, Intuitive mobile interface

**In-app purchases:** none


### TwinCAT IoT Communicator

[App page](https://appshunter.io/ios/app/twincat-iot-communicator/id1113995901)

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.

**Highlights:** 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

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

**In-app purchases:** none


## Frequently asked questions

### Is SIMATIC WinCC OA UI free?

SIMATIC WinCC OA UI is free to download, with no in-app purchases.

### Is TwinCAT IoT Communicator free?

TwinCAT IoT Communicator is free to download, with no in-app purchases.

### Which has better reviews, SIMATIC WinCC OA UI or TwinCAT IoT Communicator?

SIMATIC WinCC OA UI and TwinCAT IoT Communicator are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do SIMATIC WinCC OA UI or TwinCAT IoT Communicator have ads?

Neither SIMATIC WinCC OA UI nor TwinCAT IoT Communicator shows ads.

### Which is updated more often, SIMATIC WinCC OA UI or TwinCAT IoT Communicator?

SIMATIC WinCC OA UI ships an update every 2 months, and TwinCAT IoT Communicator every 2 months. Most recently, SIMATIC WinCC OA UI was updated on October 25, 2026 and TwinCAT IoT Communicator on October 14, 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.*