PocketCAS is a very advanced mathematics application which can help you with any kind of math problem, from elementary school all the way up to calculus, algebra and statistics. It can replace your old graphing calculator, help you with your homework, and assist you in any kind of calculation for university or work. This app is an indispensable tool for every student, teacher, and engineer. It makes college-level calculus and algebra easy, and can help you in a wide range of cases. It provides features comparable with a TI-89 calculator, and combines them with a modern, intuitive interface and incredible graphics capabilities.
Note: Now requires OS X 10.11 or later