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Spatial computing is a broad way to describe apps and interactions designed for three-dimensional space; AR, VR and mixed reality describe more specific kinds of user experience. For a development decision, look first at what the user sees: AR adds digital content to a view of the physical world, VR replaces that view with a virtual environment, and mixed reality combines or transitions between physical and digital environments. The labels overlap across vendors, so the target device’s display, sensing, inputs and runtime matter more than the label alone.
What do the terms mean?
Spatial computing: an interaction and platform frame
Spatial computing describes computing situated in three-dimensional space: apps can appear as spatial objects or environments, rather than only as conventional flat windows. Apple uses this framing in its visionOS developer documentation for building immersive apps and games for Apple Vision Pro. That is Apple’s platform usage, not a universal definition shared by every vendor. Apple’s visionOS documentation
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AR: digital elements over the physical world
Augmented reality adds 2D or 3D digital elements to a live view of the physical world captured through a device’s sensors. The content is presented as if it inhabits the user’s surroundings. Apple’s ARKit combines motion tracking, world tracking, scene understanding and display features used to build AR experiences. Apple’s ARKit documentation
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Virtual reality presents an immersive digital environment by occluding the user’s view of the physical world. This makes visibility a practical distinction: in a VR experience, the user is looking at the virtual environment rather than a live view of the room. Microsoft’s mixed-reality overview
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Mixed reality: physical and digital experiences together
Microsoft describes mixed reality as blending physical and digital worlds, including experiences across a spectrum that can transition between AR and VR. Its account discusses capabilities such as spatial mapping, anchors, hand and eye tracking, speech input, spatial sound and collaboration around 3D assets. Other vendors may use the term differently, so treat this spectrum as Microsoft’s framing rather than a single industry-wide taxonomy. Microsoft’s mixed-reality overview
XR: a collective term and API context
XR is commonly used as an umbrella term for AR and VR. OpenXR is a developer API standard for accessing AR and VR platforms and devices; it is not a game engine, nor does it make every device expose the same capabilities. Microsoft’s OpenXR documentation
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How should developers distinguish the experiences?
Describe the experience in terms a user can observe, then verify which device and runtime can deliver it. These comparison axes turn broad labels into implementation questions.
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| Decision axis | What to establish |
|---|---|
| Physical-world visibility | Is the physical world directly visible, shown through a camera, blended with digital content, or occluded by a virtual environment? |
| Environmental understanding | Does the system track motion, map the space, understand scenes, recognize surfaces or objects, or support anchors? ARKit documents world tracking and scene understanding; Microsoft’s MR account discusses spatial mapping and anchors. |
| Inputs and interaction | Which inputs are required—hands, gaze or eye tracking, speech, controllers—and does the platform support spatial audio? Availability depends on the device and runtime. |
| App and engine stack | Will the app use platform frameworks such as ARKit or visionOS, or an engine and a cross-platform API such as OpenXR? |
| Portability and feature access | Which app logic and assets can be shared, and which features need platform-specific APIs or extensions? |
| Development prerequisites | For visionOS development, Apple specifies a Mac with Apple silicon. Check the current vendor documentation for prerequisites on other target platforms. |
How should you choose a development path?
1. Start with the view the user needs
Decide whether users must see their surroundings, see them combined with digital content, or have them replaced by a virtual environment. This establishes whether an AR, VR or mixed-reality description fits the user-visible behavior. If the experience changes between those states, document the transitions rather than relying on one label.
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2. Turn spatial behavior into requirements
List what the app must understand or follow: room geometry, surfaces, objects, user motion, hands, gaze, voice or spatial audio. Confirm that each requirement is available on the intended device and runtime. For example, an app that needs content to stay anchored to a surface has a different dependency from one that only places a floating panel in the user’s view.
3. Match the platform to the experience
For visionOS, Apple says development requires a Mac with Apple silicon and describes SwiftUI as the way to take advantage of the platform’s immersion. Apple also documents adding a visionOS destination to an existing iOS or iPadOS app, with platform-specific work as needed. Treat that as a starting route, not a promise that an existing app will work unchanged. Apple’s visionOS documentation
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4. Use OpenXR for access, not as a portability guarantee
Microsoft describes OpenXR as a portable route to device features through engines such as Unity and Unreal. A shared API can reduce platform-specific work, but extensions and native capabilities still vary. Check feature support and runtime behavior on every target device; do not assume that a project using OpenXR will look or behave identically everywhere. Microsoft’s OpenXR documentation
5. Write product copy around behavior
Tell users what they see and do: for example, whether digital objects appear over a live view of a room or whether an immersive environment replaces that view. Use a platform’s own terminology when describing that platform—Apple uses “spatial computing” for visionOS, while Microsoft presents mixed reality as a spectrum. Naming does not change the capabilities the implementation requires.
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What these labels do—and do not—tell you
The terms are useful shorthand, but they do not specify a complete technical design. “AR” alone does not tell you whether a device uses optical see-through or a camera view; “mixed reality” does not guarantee a particular tracking feature; and “spatial computing” does not identify one universal API or hardware configuration. Make the display behavior, sensing needs, interaction methods and target runtime explicit in a project brief.
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