Excellent for Multivariable Calculus

The 3D graphs are clear and easy to use. With a touch, you can spin around surfaces like f(x,y)=sin(x-y) or graph parametric surfaces. Graphics are so much clearer than those of TI89 calculators. A beautiful app!
Also very good for Algebra 2 and PreCalculus.

Joel T. Patterson about Good Grapher Pro - scientific graphing calculator