This calculator can calculate the fastest of all calculators.
Flicking, you can input +-*/ in the same time with number.
e.g. If you type like below,
, , , [4(with flicking left)], , 
it means "123+456".
In addition, this calculator doesn't have "=" key.
That is because you don't have to press it.
Flick Calc Kyu show the answer right after your typing.
English and Japanese are available (depending on the device setting).