Widget Calculator PRO is a free and customizable home screen and lock screen app with a built-in calculator. It allows you to choose a background color and transparency and customize your phone's home screen and lock screen. It's free and easy to use, so don't hesitate to give it a try!

The app comes with an in-built calculator that allows you to perform basic math operations. It can also be used to find the square root, square, and cube of a number. In addition, it has the capability to find the absolute value of a number, the minimum and maximum values, and the difference between two numbers.