I went through the entire Digital SAT prep course and the calculator that is supplied is not Desmos. The College Board test uses Desmos. So if you take the Digital SAT from College Board it's a totally different experience. Desmos is an outstanding tool and is vital to achieving the highest possible score. 

Not only should learners have access to Desmos on every math question on the Digital SAT Math prep, but there should be a COURSE ON EFFECTIVELY USING DESMOS ON THE DIGITAL SAT MATH TEST.