Grapher - Equation Plotter

An extensive yet lightweight math graphing calculator and equation solver.

Grapher is a fast and effective equation plotter, capable of drawing any function, solving equations and calculating expressions. Especially if you're a student, teacher or engineer, this app is made with you in mind! A wide range of predefined functions is available, including trigonometric & hyperbolic functions, polar coordinates, differentiation and more. Anything you type will be processed and displayed instantly by a powerful math engine, in both 2D and 3D modes. Furthermore, functions can reference each other by their name.

As I strive to make Grapher fit your needs, any feedback and bug-reports are greatly appreciated. This free version has most but not all features; please consider buying Grapher Pro to enjoy awesome extensions such as parameter sliders and complex plotting!

Curve types

• Function (e.g. parabola, sine wave)

• Polar (e.g. rose, spiral)

• Parametric (e.g. ellipse, Lissajous) on the xy-plane or rθ-plane

• Implicit equation (e.g. conic sections)

• Implicit inequality (e.g. half-plane)

• 3D function (e.g. paraboloid)

• 3D parametric curve (e.g. helix)

• 3D parametric surface (e.g. sphere, hyperboloid)

More features

• Equation solver (numerical)

• Find roots, extrema and intersections with other functions

• Functions can reference each other, e.g. g(x)=2*f(x+1)

• Custom math keyboard

• Auto-detect input type

• User variable support for both numbers and functions

• Adjustable parameter range (for cartesian, polar & parametric curves)

• Input history

• Plot up to 28 graphs at once

• Differentiation (numerical)

• Trace graph

• Capture screenshots

Note: Mathematical functions should be typed by their names, for example sqrt(x) means √x. Hold a key to see all function names starting with that letter. If something is unclear, be sure to check out the 'Help' page as all details are summarized there.