From Dan Meyer - Math Worlds

Update for the 2025 AP Exams: For all exams that allow or require calculators, except AP Statistics, you can use the built-in Desmos graphing calculator through the Bluebook testing application. Note that for Calculus AB, Calculus BC, and Precalculus, Desmos will only be available in the calculator-required parts of the exam. These exams continue to have parts where no calculator is allowed.

Desmos, if you didn’t know, makes a web-based graphing calculator that’s 1000% more powerful and fun to use than the plastic jobs you might have used when you were a student. Plus it’s free, so students can practice at home with the same tools they can now use on the AP exams.