It's extreme graphing. A graphing calculator with 3D. Free version also available. 2D: Functions, Parametric Relations, Polar graphs. Algebra: Zero, Max/Min, Intersect. Calculus: Derivatives, Tangent lines, Integrals. 3D: Functions, Parametric Surfaces. Lighting, augmented reality mode. Touch panning/scrolling. Tracing w/Derivative. Tables.