Mechanical Pendulums vs Chemistry App

In mechanics, in the area of dynamical system, a N-tuple pendulum is a set of N simple pendulums attached to each other. These N-tuple pendulums are physical systems that exibits rich dynamical behavior. For certain energies, are the motion of these mechanical pendulums often chaotic. You can influence the motion of the pendulums by holding your device in different positions. The equations of motions of these pendulums has been derived using the Sophia mechanical package. The different set of differential equations are solved using the 4:th order Runge-Kutta method for the time stepping. Within this application you can switch between these mechanical pendulums: - Double - Triple - Quadruple - Quintuple - Sextuple - Octuple - Symmtric Double - Simple 3-Dimensional The visualization of the pendulums can be viewed in either a Quartz view or in an OpenGL view.

Chemistry App is a simulation-first chemistry learning environment where users actively build, manipulate, and test atomic and molecular systems. Unlike reference-style chemistry apps, this app centers on interaction and cause-and-effect understanding. Primary Use Case: Help users understand how atoms behave and react by letting them directly manipulate systems instead of reading static content. Core Features: • 3D Atomic Models (Interactive, not static)  Users rotate atoms, inspect electron shells, and observe how structure relates to behavior. • Reaction Sandbox (Key Differentiator)  Users drag elements together to trigger reactions. Outcomes depend on conditions (for example: heat, pressure). This is not pre-rendered content, reactions are condition-driven. • Compound Formation Logic  The app models bond types (ionic, covalent) and shows resulting structures in 3D. • Guided Progression System Users move from simple atoms → compounds → complex systems through structured steps. • Applied Chemistry (real-world mapping) Everyday substances (for example: NaCl, glucose) are tied to their molecular structure and behavior. • Game Mode (reinforcement, not primary) Puzzle mechanics are used to reinforce compound recognition and reaction patterns. What makes this app different: Interaction-first (not content-first) Simulation-driven reactions (not static animations) Unified system: atoms then reactions then compounds then real-world context No login, no user-generated content, no payments.