Result. calculator lets you input even complex expressions fast and get your results fast.
To achieve this, functions are divided into 3 categories accessible under the 3 white buttons. Touch one of them and you are presented with function selection, drag to one of the functions and release. That's it. It takes just one touch and drag and you never leave the main screen. No more swiping, scrolling, searching and then swiping back to the main screen.
This allows you to input expression fast and intuitively and lets you focus on the result.