“I bought the calculus app for the ti-89 and ever since then, using it made calculus 1 and 2 VERY easy for my homework, assignments, projects, quizzes, and exams.
If there was any problems on trying to enter the solution on the calculator, they have a GREAT tech support waiting and most certainly willing to help you.
I want to personally thank Mike, who was a big help and instructing me step-by-step along the way on how to properly input the function into the calculator.
I would most certainly recommend this app to my friends and classmates!”
(M.A.)