Calculator Expert

Calculator Expert is the most precise mathematical app for your Mac. It lets you conduct an unlimited amount of calculations accurate to the very last digit.
Calculator Expert uses a highly precise mathematical library.

Thus it doesn’t have to approximate the result and guarantees that you get mistake-free calculations even if you’re doing trigonometry.
The computation history is stored within the app. You can view, edit and erase your calculations any time you want to. Moreover, prior results can be used to carry out new calculations.
All the arithmetic operations and more than 25 mathematical functions are fully supported. Addition, subtraction, multiplication and division are complemented with roots and logarithms of any degrees.