""It’s a high end graphing calculator (that supports discrete number theory, Calculus derivative and plotting of functions), an almanac, a currency/unit converter and a pretty sophisticated stock analysis tool." Can't you do all of these on the mobile website as well? I tried a couple of the examples in the article on the mobile website and they all show the same results as the screenshots. I still don't understand what the app does that the site doesn't....aside from a little bit of a simpler interface."
- Brian Sloane