One word: WOW!
This app is extremely useful. Have a question? ask this software (although it cannot tell you your future or anything like that:)). If you type up a math question, it has the answer. WITH THE STEPS INVOLVED. If you want a working star chart or other graph, WolframAlpha is capable of providing it. You type something, it results in every bit of info you could ever need.
Best app. Better than your typical search engine. Definitely worth the 4 dollars and tax.
Meerymeer about
WolframAlpha Classic, v1.6.4