Equations is an app that helps you to solve equations, find common constants, and get common formulas. It consists of three sections: solver, constants, and formulas. SOLVER: - Equation solvers: to solve quadratic equation solvers, cubic equation solvers. - Systems Solver: to solve systems with two unknowns, three unknowns, or four unknowns. CONSTANTS: a List of most common constants. FORMULAS: more than 65 formulas, definitions and theorems in algebra, geometry, trigonometry, physics, chemistry, logarithms, and exponents.