Do students need a calculator to test?

On 2020 AP Exams that may involve calculations (including some STEM and economics courses), questions are designed such that required calculations can be done with a pencil and paper, with no calculator (including one with graphical or statistical capabilities) required. However, use of a calculator is allowed and may be helpful. Simple (“four-function”) calculators are freely available as apps for computers and phones (i.e., most or all internet-connected devices), and can be installed beforehand for use on the exam.