MyScript Calculator for iOS from Vision Objects is an app that accepts cursive input of mathematical expressions, converts to text and then computes the answer. It's an amazing app. Best of all, it's free.
Arthur C. Clarke, the legendary science fiction writer, developed three laws, observations about technology. The third law states, “Any sufficiently advanced technology is indistinguishable from magic.” That's what I thought of when I discovered this app from Vision Objects. I so want to take it back in time to show it to myself as I was first opening the box of my beloved HP-67 calculator.
While the app is no substitute for a great hand-held or iOS calculator like, say PCalc, it's perfect for quick, back of the envelope calculations.
Let's start with a short video review to demonstrate how the app works. My preference was to use a stylus, but the app works fine with your finger, even on the small display of an iPhone.