Wolfram|Alpha app for iPhone marked down from $50 to $20
The amazing Wolfram|Alpha app for iPhone is on sale for $20 (normally $50) for the rest of the year.
With its simple interface the Wolfram|Alpha App lets you instantly compute answers to questions across thousands of domains–from finance and food, to math and medicine, to stocks and spacecraft, to wordplay and weather...
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Mark Frauenfelder
My latest book, Made by Hand, now in paperback. Follow me on Twitter.
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