Late last year, Google launched a graphingcalculator in search that takes mathematical problems and converts the results to an interactive graph. Google has updated the calculator available on the search page.
Google has made their search bar into a graphingcalculator. The graphing functions are strongly capable; searchers can enter everything from a simple geometric function such as sin(x) to a wild set of lovable equations.
Mashable says the app has value as a graphingcalculator, stock analyzer, etc. Wolfram|Alpha has released an iPhone and iPod Touch App. At $50, it's certainly one of the more pricier apps available in the App Store.