But if you can’t justify a $150 calculator, there are some cheap and even free options out there to get the experience. To start with, HP has a free app that runs on Windows or Mac that works ...

Desmos offers a variety of math tools online. Many are calculators, including “a four-function, scientific, and graphing calculator.” The calculators are free to the public and can be accessed ...

Why not spruce up the scientific calculator of yore with the wonders of modern microcontrollers? While you won’t be able to use Sci-Calc on a standardized test, this classy calculator will let ...