HMI Viewer vs UniFi Access
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.
UniFi Access
Manage your entire access control system remotely. Oversee doors, users, readers, and security policies. View real-time activity logs and receive doorbell notifications.
- Manage connected doors and security policies
- Oversee user rosters and access methods
- Configure reader devices and greeting messages
- View real-time access event logs
- Receive doorbell notifications
- Grant remote access to visitors
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The UniFi Access mobile app is a convenient, comprehensive management tool that allows you and other administrators to oversee every aspect of your Access system, including connected doors, user rosters, reader devices, access cards, and security policies. With the app, you can also view real-time access event logs to maintain full vantage of visitor and employee traffic throughout your workspace. [Doorbell] Receive a push notification when someone rings a connected doorbell. [Remote View] Greet visitors remotely with the UA Pro, then grant them access remotely. [Devices] Add new Access devices and configure a variety of settings, including greeting messages, broadcast names, digital keypad layout, volume, and display brightness. [Doors] Manage individual doors or group them to instantly make sweeping security alterations on the fly. You can also apply door and floor-specific access policies for enhanced building security. [Users] Add, edit, and remove users with ease. You can also assign individual and group-level access methods, such as PIN codes or UA Cards. [Activities] Review detailed access logs and card reader video captures to track on-premises activity anywhere, anytime. [Cards] Utilize existing NFC cards or assign new UA Cards to system users.
Screenshots
Verdict
The clearest difference is price: UniFi Access at Free against HMI Viewer's $0.99. UniFi Access also leads on ratings volume (5.1K vs 4) and update cadence (every 2 weeks vs every 2 months). HMI Viewer's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On rating, ads and in-app purchases 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
UniFi Access is free to download; HMI Viewer costs $0.99 up front. 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 HMI Viewer against 4.9 for UniFi Access. That said, the two scores are not equally well evidenced: UniFi Access has 5.1K ratings behind it against 4, so its average is the more settled of the two.
HMI Viewer ships an update every 2 months, UniFi Access every 2 weeks. Both last shipped on October 24, 2026.
| Parameter | HMI Viewer | UniFi Access |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (4 ratings) — better | 4.9 (5.1K ratings) |
| Positive reviews | — | 59.8% of reviews |
| Number of ratings | 4 | 5.1K — better |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 280 MB |
| Age rating | 4+ | 4+ |
| Developer | Greg Maendel | Ubiquiti Inc. |
Customer experience
HMI Viewer
UniFi Access
Bugs and requests
HMI Viewer
Not enough reviews yet to summarise bugs or requests.
UniFi Access
Reported bugs
4 issues- App crashes on launch
- Notifications not working
- Remote login issues
- Outdated information in app
Requested features
4 requests- Integrate with Unifi Protect
- Add schedule management in app
- Allow door hold open/timer controls
- Improve camera/intercom integration
In-app purchases
HMI Viewer
No in-app purchases
UniFi Access
No in-app purchases








