Calculator FVN app for iPhone and iPad

It is a calculator that can edit input data.
It is not necessary to calculate again when the total is not suitable because of the calculation of shopping etc.
The data under the calculation is recorded in the table, and is good at the recalculation by the correction later.
There are one 100 line-table.
Ten tables can be used at the same time, and use it, please devising it.
The accuracy of calculations are 16 digits.
Moreover, because the reading out function is provided, the figure can be confirmed while seeing the slip etc.