If you have Android and know what Wolfram Alpha is get ready to part with $2 since the app is now available for Android users (1.6 and higher) and it even includes voice search. “The app puts Wolfram|Alpha’s growing repository of curated data, including over ten trillion data elements, and its library of tens of thousands of sophisticated computational models in the palm of your hand.” This is a data engine so you get answers to data related events (like the nutritional value of food, math equations,etc) and not links to websites so it’s a lot more efficient and iPhone users (who have had the app for a while) seem to love it.

Not convinced? Just check out their site to see interactive screenshots.