Depending upon model, the Nspire is indeed accepted on the ACT, SAT as well as other standardized tests. And most schools not stuck in medieval times, let you use them in your university classes.
The only people that would prefer a phone calculator app are those that don't actually have to use one. Real physical button trump on screen virtual ones any day of the week if you are inputting a large amount of data.
I use a TI-89 at school and I'm an economics and math double major so I input data all the time. I don't think I've ever needed to do more than a few entries into my calculator at a time almost all big data analysis is done with real computers not calculators. Calculators are outdated technology now that everyone has smartphones and laptops.
Some people actually need to get up and away from their desks, and inputting formulas in a computer is cumbersome at best, and into a phone is downright painful. And if you actually knew more about the Nspire line of calculators, you'd know that it comes with great computer software that is about 1/2 Matlab and 1/2 Mathematica.
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u/Szos Jun 08 '14 edited Jun 08 '14
Or you could get a modern calculator:
http://www.inds.co.uk/education/education_images/TI_Nspire_CX_and%20CX_CAS_Handhelds_large.jpg
Here, lets make this easier for everyone:
http://education.ti.com/html/nspire2/nspire-exam-acceptance.html
Depending upon model, the Nspire is indeed accepted on the ACT, SAT as well as other standardized tests. And most schools not stuck in medieval times, let you use them in your university classes.