Great Calculator, but it needs Pi!

This is one of my favorite calculator apps and the color is very pretty. I use this app when my teacher tells us we can use calculators, unless the equation requires Pi. Then I have to go onto the standard calculator app just to use Pi. I know I could just put 3.1415926, but it would make life easier if you put the button. But even if you dont put Pi in, this app is still really good!

Dransnake about Numerical²