APP Builder is an app for excel workers

and you can use this app to write your formula.

All of people that work with excel can use this app.then how this app work? 

following us to describe you what shall we do?

- at first step you should  create sheet of app with "+" button

- at second step you should create columns of app (like previous step press "+" button)

- at third you should write the formula for other columns

- at forth as soon as  you write the formula you can see results on the cellphone screen

Also you can use these formulas:

- four main calculation operators with parentheses

- use "IF" statement like "IF{ A$=2 , 100 ,, 200}"

- use % for calculate "MOD"

- use "ROUND" for rounding operations