The limits of such calculators are part of thier appeal from an education standpoint, smart-phone allow too much opportunity to cheat. Plus all the classes wher

The limits of such calculators are part of thier appeal from an education standpoint, smart-phone allow too much opportunity to cheat. Plus all the classes where such things are needed (trig, calc, ect) you are not normally allowed any calculation aid. TI calculators exist to cater to high-schools and engineers. Engineers are finding better tools but highschools like them a lot. They are advanced enough to teach the math, and if they go around clearing all the memories before each test then it is hard to cheat with. I have fond memories of my TI-83, so many problems solved by brute force code written during the test.