This cross-platform (including Android) application offers features like Powder Diffraction Simulator, XRD Pattern Plotter, Peak Fitters, Equation of State Fitters, Bulk Modulus Calculator, Space Group Decoder, Atomic Factor; Inter-planar Spacing; Cystallite Size Calculators, and lots of mathematical tools etc.
The PC versions of the app offer a few more advanced capabilities. There are some more miscellaneous features that can come in really handy while working in the area of computational condensed matter physics.
The documentation is available at: https://www.bragitoff.com/crysx_documentation/
Sharma, M. & Mishra, D. (2019). J. Appl. Cryst. 52.
Journal link: https://onlinelibrary.wiley.com/iucr/doi/10.1107/S1600576719013682