Today only: Amazon’s newly launch AppStore for Android has Wolfram Alpha for FREE (regularly 1.99) for a limited time. Deal expires April 7, 2011.

Whoever you are and whatever you do, Wolfram|Alpha delivers insight and understanding into any facet of your life. It’s a revolutionary knowledge-querying computational engine. Wolfram|Alpha doesn’t search the web; it calculates answers based on dynamic computations.