App: Atom in a Box.
Developer: Dauger Research, Inc.
Genres: Bildung, Nachschlagewerke

Atom in a Box is an aid for visualizing the Hydrogenic atomic orbitals, the three-dimensional states that the electron occupies in Hydrogen, a prime and otherwise unwieldy example of Quantum Mechanics. It interactively shows what the Hydrogen atom "looks" like. Unique among visualizations of Quantum Mechanics, it uses highly optimized code to perform 3D volumetric raytracing through the electron wavefunction's probability density and presents its results in real-time. It animates and mathematically describes all 2109 eigenstates up to the n=18 energy level, plus superpositions of up to 8 eigenstates, allowing access to over 9 sextillion states! The bottom line is: Explore! The user are meant to explore all aspects of the atom, what it is and what it can do.

Release notes:
4K display support, Retina-display rendering of equations, Time-Evolution speed of the orbital as a new Preference, smooth transitions between orbitals of different size including start up, smooth braking of orbital rotation, icon updates in the App Store, App, and Document