Highly recommended
This is the best crystal structure app I’ve ever used!
Free
About
This app allows users to view and analyze crystal structures locally on their mobile devices. It supports various file formats and offers tools for inspecting atoms, bonds, and unit cells, with features for generating simulated PXRD patterns and morphology previews.
✓Local structure viewing
✓Supports CIF, XYZ, PDB, MOL, SDF, MOL2, RES files
✓Inspect atoms, bonds, unit cells
✓Display styles and scope control
✓Fullscreen and PXRD presentation modes
✓Simulated PXRD pattern generation
✓BFDH morphology preview
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What's New in Crys
1.4.2
July 13, 2026
- Added Viewing Direction for a/b/c, `[uvw]`, and `(hkl)`, with custom input and direction flip. - Improved structure file import and metal-coordination bonds. - Fixed long periodic boundary bonds, and added custom connections and optional hydrogen-bond candidates. - Added a reference for common bond lengths, coordination distances, and hydrogen bonds. - Added x/y/z scale bars, 25% minimum zoom and a cleaner iPad toolbar.
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FAQ
What file formats does Crys-CAST support?
Crys-CAST supports a variety of common crystallography and molecular modeling file formats including CIF, XYZ, PDB, MOL, SDF, MOL2, and RES. This allows for broad compatibility with existing datasets.
Can Crys-CAST be used for advanced crystallographic calculations?
The current version of Crys-CAST is designed for quick inspection and teaching-scale analysis. Advanced refinement, full symmetry expansion, void/porosity analysis, and publication-grade calculations are outside the scope of this initial release.
Does Crys-CAST require an internet connection to function?
No, Crys-CAST operates as a local structure viewer, meaning structure files stay on the device and all processing is done locally. This allows for offline use.
What devices is Crys-CAST compatible with?
Crys-CAST is designed for use on iPhones and iPads, offering a mobile-first 3D viewer experience. It is suitable for both handheld and tablet use.
How often is Crys-CAST updated?
The app was last updated on July 1, 2026, with version 1.0.0. Future updates will likely introduce new features and improvements based on user feedback and development cycles.
What is the learning methodology behind Crys-CAST?
Crys-CAST facilitates learning through direct visual interaction with crystal structures. Features like the fullscreen viewer, PXRD presentation modes, and simulated pattern generation aid in understanding complex structural concepts.
Does Crys-CAST offer progress tracking for educational use?
While Crys-CAST provides tools for analysis and visualization, it does not currently include specific progress tracking features for educational courses. Its focus is on providing an interactive viewing and analysis environment.
Is Crys-CAST suitable for young learners?
With an age rating of 4+, Crys-CAST is accessible for a wide range of users. Its intuitive interface and visual nature can be beneficial for introducing younger students to scientific concepts in chemistry and physics.