6. MyScript Calculator
The technology of a calculator and the ease of freehand writing are combined in this handy app. MyScript Calculator allows you to write math problems on your phone as you would on paper, and get a computerized answer just like you’d find on a normal calculator. Not only does it recognize basic operations, but it also can do trigonometry, reverse trig and power functions. With more upgrades on the way, we can only imagine how far this might go. It might be time to throw that TI-84 next to the cassette tapes and Walkman.