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CrystalRoom is built exclusively for Apple Vision Pro running visionOS. It is not available on iPhone, iPad, or Mac.

Yes. CrystalRoom is free to download from the App Store, with all eleven built-in structures and every feature on this page included. Family Sharing is enabled.

The eleven built-in structures — Corundum (Al₂O₃), Calcite (CaCO₃), Fluorite (CaF₂), Zircon (ZrSiO₄), Forsterite (Mg₂SiO₄), Diamond (C), Gold (Au), Halite (NaCl), Barium titanate (BaTiO₃, a tetragonal perovskite), Quartz (SiO₂), and Rutile (TiO₂) — are reconstructed from CIF crystallographic data bundled directly with the app. No internet connection is required to view them.

CrystalRoom includes a 20-step guided tour of the windowed workspace, an interactive immersive Halite tour, and a generated “Tour This Structure” experience that adapts to the crystal you are viewing. In immersion, start a tour with Tour on the toolbar.

Enter full immersion from the toolbar to walk through a room-scale lattice. Tap atoms around you to inspect their identity, coordinates, bonding, and local environment; use Smaller and Larger to scale the lattice around you; and switch structures without leaving immersion. Tap Exit on the head-anchored toolbar to return to your windows.

That is intentional. Entering the immersive space closes the app’s windows so nothing floats in front of the lattice. Tap Exit on the head-anchored toolbar and the windows come back exactly as you left them.

Also intentional. Reopening CrystalRoom — after closing its main window, a force quit, or a restart — restores your structure, supercell and view, but always starts with the default window pair so the layout is predictable. Only an immersive round trip brings back every window you had open.

visionOS does not let an app close its own last window. Close that panel yourself; the next tap on the app icon opens the main window as usual.

Select two atoms to measure the distance between them, or three atoms to measure an angle — the angle is calculated at the middle atom. CrystalRoom draws guide lines directly on the structure so measurements stay connected to the atoms, and keeps a history of your measurements.

Set the h, k, l indices or pick a (100), (110), or (111) preset. CrystalRoom shows the live d-spacing in the panel and on the plane itself; you can display one plane or the entire plane family and offset planes through the lattice.

Auto-Spin continuously rotates the structure at a gentle pace — ideal for demonstrations, lectures, or leaving a structure on display. Enable it from the toolbar. You can still zoom and adjust the supercell size while auto-spin is active.

A supercell repeats the unit cell along a, b, and c — each set independently — so you can see the full periodic lattice. Most structures go all the way to 5×5×5. Corundum, calcite, zircon and forsterite have large unit cells: above a few thousand atoms Apple Vision Pro cannot render a windowed scene smoothly, so CrystalRoom caps those structures at 3×3×3 or 4×4×4. The supercell panel shows the atom count and the limit.

No. The app has no accounts and no analytics, and nothing leaves your device. (This website uses Google Analytics — in the EU and UK only if you accept; see the privacy policy.)

CIF (Crystallographic Information File) is the universal standard for sharing crystal structure data, and many structures are freely available from the Crystallography Open Database. CIF Import is available through institutional licensing — if you’re at a university, research lab, or educational program interested in deploying CrystalRoom with CIF Import, contact us at support_crystalroom@kridallc.com.