HMI Viewer vs Level One
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HMI Viewer
This application allows end users to interact with PLC-controlled processes through custom-designed Human Machine Interfaces. Integrators can create and deploy these interfaces securely, enabling seamless control and monitoring of industrial systems.
- View-only HMI interface
- Interact with PLC-controlled processes
- Secure deployment to end-user devices
- Supports major PLC brands
- Native application performance
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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.
Level One
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80G 雷达物位计，液位计，蓝牙调试软件,雷达物位计，液位计，超声
Screenshots
Verdict
The clearest difference is price: Level One at Free against HMI Viewer's $0.99. HMI Viewer's advantage is update cadence (every 2 months vs every 5 months) and device support (4 vs 2). On ads, in-app purchases and iOS requirement 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
Level One is free to download; HMI Viewer costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
HMI Viewer ships an update every 2 months, Level One every 5 months. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.
| Parameter | HMI Viewer | Level One |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 17 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Greg Maendel | Zhidu Zhou |
In-app purchases
HMI Viewer
No in-app purchases
Level One
No in-app purchases
