Behind an unobtrusive calculator you can hide your private pictures, videos, audios and files. With the PIN that you type in the calculator, only you can see your files. Set your PIN and a security prompt, you can even add files that remain hidden. Only you can see when you open the calculator app "CalculatorPro". Note: If hiding files is to be removed, they will be exported to the folder "RechnerPro", not into the old original folder (please note this)!