Absolutely stellar Functions as a calculator, so that's already doing all it needs to do. On top of that it adds instant speed, I swear it was showing me results for a calculation before I actually started typing it. On top of all of that, the design is just beautiful on every level. I want this as my lock screen, just so I can look at it every time I use my phone.
Excellent scientific calculator with expressions, fractions, repeating decimals.
Calculator, Graphing calculator, Converter and Matrix calculator: all in one app