Free
Good Grapher  scientific graphing calculator
Good Grapher™  great and very powerful scientific graphing calculator. It will become your reliable assistant from elementary school to university and work. Customer reviews: "Amazing app! I love it. It has Many great features that beat my T83" "Best calculator. It's my favorite app now ) Functionality and usability is on top level." SCIENTIFIC CALCULATOR:  History tape  real and complex numbers  radians and degrees angle modes, support for minutes, seconds, grads  constants: astronomical, atomic, electromagnetic, mathematical, physicochemical, universal  functions: sin, cos, tan, cot, sec, csc, sinh, cosh, tanh, coth, asin, acos, asec, acsc, atan, acot, asinh, acosh, atanh, acoth, log2, log10, ln, logn(n,x) (log x with base n), ?, ³?, abs, avg, ceil, floor, round, deg2rad, rad2deg, max, min, sgn, lcm, gcd, nCr, nPr, arg, real, imag, conj, polar  operators: +, , *, /, % (modulus), ^, ! (factorial), ' (minutes), " (seconds), {grad}  ?  assignment operator and A, B,…,J variables for values storage  copy/email calculations 2D GRAPHING CALCULATOR:  carefullydesigned graph visualization with multitouch support (pinch to zoom and drag to scroll)  cartesian y(x) and x(y), polar r(?) graphs (parametric x(t)y(t) and implicit in Pro version)  inequalities drawing (in Pro version)  function tracing and automatic min/max, zeros, intersections scanning for all function types  intersection discovering between different function types, e.g. between cartesian y=x and polar r=1  unlimited number of functions can be drawn simultaneously  standard, trigonometric and logarithmic axes  proportional and nonproportional scaling  customizable graph colors  table of graph values  copy, save, email screenshot 3D GRAPHING CALCULATOR:  pinch to zoom and drag to rotate  cartesian x(y,z), y(x,z), z(x,y), cylindrical x(p,?), y(p,?), z(p,?), spherical r(?,?) graphs (parametric xyz(u,v) and implicit in Pro version)  inequalities drawing (in Pro version)  points, lines, surface drawing modes  configurable graph bounds  copy, save, email screenshot MATH SOLVER:  polynomial solver: 2x  3 = 0 (linear) 3x² + 4x + 8 = 0 (quadratic) 5x³ + 2x²  4x + 2 = 0 (cubic) 7x?  2x³ + 3x² + 2x  1 = 0 (quartic)  system of linear equations solver with 2 unknown 2x  9 = 9 3x + 4y = 13 with 3 unknown 5x + 4y + 2z = 4 7x + 2y + 3z = 19 3x + 5y  1z = 10 MAC APP STORE Good Grapher is also available on the Mac App Store. See www.goodgrapher.com Visit www.goodgrapher.com for more screenshots, demo videos, details and news. Feel free to contact us for any questions and suggestions.
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Just like a regular scientific calc”
This is one of the best math apps I've seen”
This is by far the best graphing calculator I've ever had”

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Nothing here… Users found nothing but good things to say about this app!
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