EMS vs Halo OS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EMS
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EMS Express Mobile Software - Quantum Ultra is an application designed to provide intuitive user control of Quantum Ultra videowall processors from Apple® iOS® devices. The software combines the freedom of wireless control with an easy to use application operated with familiar finger gestures, such as tap, drag and drop, swipe, and pinch/stretch. It facilitates preset selection, window size and position, source selection, and other common operational tasks, and can work in tandem with VCS and a control system. Up to 10 users can control one or more videowalls. Separate User, Designer, and Administrator credentials define operational roles. EMS-Quantum Ultra is ideal for use with systems requiring one or more points of control through a user-friendly interface. EMS-Quantum Ultra can be used in any application that requires mobile, wireless control of a videowall for operational use. This includes corporate conference rooms, command and control centers, network operations hubs, or other applications that would benefit from intuitive control, either single-point or multi-point. A LinkLicense® upgrade for the Quantum Ultra, LinkLicense for EMS-Quantum Ultra, is required to enable communication between EMS and the processor. Familiar finger gestures facilitate easy and intuitive control of videowalls. Drag and drop enables quick changes between presets and source selection within windows. Effortlessly resize windows using familiar two-finger pinch and stretch actions. To access each videowall in the system, swipe to switch between canvases. Features • Provides simple user control of Extron Quantum Ultra videowall processors from a mobile device • Simplifies common operational tasks, such as preset selection, window management, and source switching • Supports familiar operational gestures, including tap, drag and drop, swipe, and pinch/stretch • Separate access credentials for Users, Designers, and Administrators • Control videowalls from up to 10 mobile devices simultaneously • Requires Extron videowall processor with LinkLicense® for EMS‑Quantum Ultra • Easily preview presets prior to recalling • Snap grid simplifies window placement • Precise, pixel perfect editing of window size and position • Create, save, and recall up to 128 window presets • Multi-level Undo function • Lock feature prevents windows from being moved or resized while still allowing source changes • Quickly remove all windows from a canvas with a single tap • Mute feature hides the selected window • Cut, copy, and paste functions easily replicate the selected window • Window layer control • Alerts notify users of temperature warnings, along with power supply and fan failures
Halo OS
Transform your iPhone or iPad into a functional desktop computer. Connect external displays, keyboards, and mice to navigate a web browser and file explorer with ease.
- External monitor support
- Bluetooth keyboard and mouse compatibility
- Web browser
- File explorer
- TXT file reader
- Window management
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Initial Project to turn your iPhone/iPad into a computer. How to use this app: - Connect your iPhone/iPad to an external monitor (use Lightning Digital AV Adapter, HDMI (for iPad) or use Apple AirPlay) - Connect Bluetooth Mouse and Bluetooth Keyboard (if you are using iPhone you gonna need to activate Assistive Touch and screen orientation change to Off so you can rotate the iPhone screen) Feature: Web browser File Explorer with a txt file reader. -- How to use the app --- Double click to open files and folders Click the window top bar so that windows became top window Double click top bar will expand the screen
Screenshots
Verdict
The clearest difference is update cadence: EMS at every 10 months against Halo OS's every 26 months. EMS also leads on iOS requirement (12.0 vs 15.2). Halo OS's advantage is device support (3 vs 1). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
EMS ships an update every 10 months, Halo OS every 26 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | EMS | Halo OS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (8 ratings) — better |
| Positive reviews | — | 83.3% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 10 months — better | Every 26 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.2 |
| Further details — not scored | ||
| Size | 16 MB | 5 MB |
| Age rating | 4+ | 17+ |
| Developer | Extron Electronics | Tiago Mendes |
In-app purchases
EMS
No in-app purchases
Halo OS
No in-app purchases









