I built a free app for Vision Pro that turns CAD/Mesh files into full-scale objects you can walk around and measure
Hey everyone,
I’ve been working on 3D Spatial Viewer, an app for Apple Vision Pro aimed at people who actually need to inspect 3D models - engineers, designers, and also just hobbyists who scan or print things and want to see them at real size before committing.
The core idea: import one or multiple parts (STL, OBJ, PLY, or USDZ) and they drops into your room (maintaining the original coordinates). You walk around them, you can rotate the parts with your hands, slice them open on any axis to check wall thickness, and place measurement points directly on the geometry.
The feature I’m probably most proud of is Best Fit / ICP deviation analysis - you can overlay two models (say, a scan vs. the original CAD, or two design revisions), auto-align them, and get a color-coded map showing surface deviation in millimeters. Useful for QA, scan-to-CAD validation, or just seeing what changed between versions.
Other stuff in there: per-model transparency (see through assemblies), measure tool, save/recall camera views for reviews (bookmarks), screenshots with markup tools, SharePlay for reviewing models together remotely (beta).
It’s free on the App Store: https://apps.apple.com/app/3d-spatial-viewer/id6772415051
Built it solo, so I’d genuinely appreciate any feedback — bugs, missing formats, workflow annoyances, anything. Happy to answer questions about how it works too.