Android/iOS: Your phone includes a basic calculator and you can download more advanced apps, but inputting complex maths isn't always easy. MyScript Calculator allows you to write out maths problems in the same way you would on paper and then solves them.
The handwriting recognition isn't 100 per cent perfect. However, when you're dealing with dividing fractions or layered parenthetical expressions, just getting the equation into your device can be a lot faster if you can write it out.
MyScript Calculator [Google Play Store]
MyScript Calculator [iTunes App Store]