Grapher - Equation Plotter

Basile Van Hoorick

About this app

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.

Ratings and reviews

As a private tutor, this app is a very handy visualization tool for me. It's really hard to feed the students tasteless equations and harmful if they just memorize. If I can't make them 'see' what those equations actually represent, I feel like I've let them down. This app has been quite helpful on that regard. Thanks for the free service and here's a free virtual hug for the developers 🤗

User friendly. 3-D Surfaces are plotted instantly. As a mathematician and physics, I do visualise and find solutions to problems in no time. Thanks for the fascinating app of the day.

It's actually a little hard to use the app at first, like for plotting greatest integer function you have to write 'floor(x)'.well i will appreciate if this app can show me a detailed plot.like while using floor (sin(x)) if it could plot sin(x) and then could show the continuity of the function in a different colour,and you can add mathematical signs of certain functions for better usage.otherwise it's a great app.

What's new

• Removed ads: I decided to make Grapher ad-free in order to facilitate your remote learning experience with minimal disruptions. I am wishing the best of luck to all students who are working through these difficult times!
• Added absolute value '|' key
• Custom keyboard bugfix