# HMI Viewer

> View and interact with PLC-controlled processes via custom Human Machine Interfaces. (iPhone/iPad app by Greg Maendel.)

- Source: https://appshunter.io/ios/app/hmi-viewer/id1261910446 (this page in markdown: same URL + `.md`)
- Developer: [Greg Maendel](https://appshunter.io/developer/507756979)
- Category: Business, Productivity
- Price: $0.99
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 17 MB
- Languages: American English, European Spanish
- Released: 2018-02-13
- Data updated: 2026-08-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hmi-viewer/id1261910446/reviews.md

## What is HMI Viewer?

HMI is the view only version of our HMI system (HMI and HMI Editor). With the HMI Editor app integrators create efficient, advanced, highly responsive "Human Machine Interfaces" and deploy securely to end users's devices who are able to run projects specifically designed for them.

As an end user you can download your projects with a single tap of your finger and interact with your Programmable Logic Controllers (PLCs) controlled processes as you never did before.

The HMI Editor and HMI apps are fully native and support all major Programmable Logic Controller (PLC) brands.

## Key features

- View-only HMI interface
- Interact with PLC-controlled processes
- Secure deployment to end-user devices
- Supports major PLC brands
- Native application performance


## Frequently asked questions about HMI Viewer

### What is HMI Viewer used for?

HMI Viewer allows end users to interact with and monitor processes controlled by Programmable Logic Controllers (PLCs) through custom-designed Human Machine Interfaces. It provides a view-only version of the HMI system for seamless interaction with industrial operations.

### What devices does HMI Viewer support?

HMI Viewer is available for Mac, iPhone, iPad, and iPod. This broad compatibility ensures users can access their HMI projects across various Apple devices.

### How much does HMI Viewer cost?

HMI Viewer is a paid application priced at $0.99. This one-time purchase grants access to its features for viewing and interacting with PLC-controlled processes.

### Is HMI Viewer suitable for all ages?

HMI Viewer has an age rating of 4+. While the application itself is rated for younger users, its functionality is designed for industrial and business contexts.

### Does HMI Viewer work with all PLC brands?

Yes, HMI Viewer and its companion HMI Editor app are fully native and support all major Programmable Logic Controller (PLC) brands. This ensures broad compatibility for integrators and end users.

### How often is HMI Viewer updated?

The latest version of HMI Viewer is 0.6.0, last updated on May 28, 2026. Users can expect ongoing support and potential updates for the application.

### Can I create HMI interfaces with HMI Viewer?

No, HMI Viewer is a view-only application. The creation and deployment of HMI interfaces are handled by the companion HMI Editor app.

### Does HMI Viewer have ads?

HMI Viewer is an ad-free application. Users can interact with their HMI projects without any advertisements interrupting their experience.

## Version history (last 5 releases)

### 0.6.0 — 2026-05-28

Bug Fixes.

### 0.5.9 — 2026-05-26

Bug fix.

### 0.5.8 — 2026-05-20

This update improves reliability and usability when running HMI projects on iPad, iPhone, and Mac.

REST API, MQTT, and VPN connection state handling has been improved, with fixes for persistence and project compatibility. Chart, Trend, and BarLevel rendering now supports the latest color start point options created in HMI Editor.

This release also includes fixes for layout behavior, landscape scrolling, toolbar stability, Mac launch stability, expression handling, and loading older projects.

### 0.5.7 — 2026-05-07

What's New in 0.5.7

New connectors
• MQTT Connector — publish and subscribe to topics on any MQTT broker. Supports username/password and TLS, automatic JSON parsing of received payloads, and a last-message viewer with syntax-highlighted JSON.


Items
• Slider: new stepValue property — when set to a positive value the slider snaps to multiples of that step (set to 0 for the previous continuous behavior).
• Inspector connectors (PLC, REST, MQTT, VPN) now share a unified header: connector name, endpoint or broker, and a live-status dot.

Fixes
• Fixed the Model Browser flying off-screen when the search bar was tapped.
• Fixed several Model Browser search bugs — crashes on rapid input, missing VPN and Background results, and stale state on reopen.
• Fixed sub-pixel position drift when moving, resizing, grouping, and ungrouping items.
• Fixed a crash when loading older projects that contain TapRecognizer items.
• Fixed copy of REST connectors whose response property contains an array value.

### 0.5.6 — 2026-04-29

What's new in 0.5.6

UI:
New SF Symbols icon picker
Refined toolbars, menus, and alarms layout
iPad page size and iPhone rear-panel text adjustments

REST API connectors:
Per-connector Polling Interval
Enable/Disable switch for individual connectors
Poll Now on-demand refresh
Updated Information panel

Fixes:
Correct initial orientation when opening a project
Faster, more reliable networking layer

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## More apps by Greg Maendel

- [Farm Tools](https://appshunter.io/ios/app/farm-tools/id507756976)
- [HMI Editor](https://appshunter.io/ios/app/hmi-editor/id1261910661)
- [Rite Control PLC](https://appshunter.io/ios/app/rite-control-plc/id6768149545)
- [TypeCalculator](https://appshunter.io/ios/app/typecalculator/id6783970060)

All apps by Greg Maendel: https://appshunter.io/developer/507756979

## Related topics

[hmi](https://appshunter.io/ios/topics/hmi) · [hmi remote viewer](https://appshunter.io/ios/topics/hmi-remote-viewer) · [odrid hmi](https://appshunter.io/ios/topics/odrid-hmi) · [remote hmi](https://appshunter.io/ios/topics/remote-hmi)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*