Algeo is the most beautiful scientific graphing calculator available on the Play Store. It's fast and powerful and you'll never have to carry around a large physical TI calculator anymore. The intuitive interface shows your drawn functions as you would write them on paper rather than squeezing everything on a single line. And you don't need an internet connection unlike other graphing calculators, it works offline as well! Useful for calculus, physics or to solve those x+y equations.
Wolfram Alpha users love using Algeo! This free app is packed with more features than a big TI 84 graphing calculator. Solve your homework with Algeo: draw functions, find intersections and show a table of values of the functions with an easy to use interface.