Simple Grapher is a scientific app that lets you plot mathematical function and equation with an easy interface. It also has a powerful ability to plot many different functions including: parametric and polar functions, beside it can also plot inequality formulas. 3D graphs are also supported. You can plot up to 120 functions at once! customize each one of these function then later you can save it as a PNG or JPG on your device.
Beside it's main function of plotting, this app comes with several tools (Calculator, Integral Solver, Fx Solver, etc). Fx Solver is a very powerful tool, yet easy to use, that can evaluate the properties of the function you provide (see screenshots for more info).
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