Rapid Calculator is a free calculator app that is simple to use and helps you to do your math quickly and easily. With it, you can calculate prices, sales, and income taxes. It is also suitable for people who need to do a lot of calculations in their daily life.

To use this calculator, you just need to enter the equation you want to calculate, and it will show you the result as soon as you've entered all the necessary information.

This app is very simple and fast to use, even if you don't have any knowledge of math.