Taking an online Calculus course or are you enrolled in a college or AP Calculus course? This app is a collection of facts and questions (Trig, Pre-calculus, and Differential/Integral Calculus) that each student taking a College Calculus 1, Calculus 2, or an AP Calculus class needs to know. The "cards" were created by a veteran Calculus teacher, Mr. White, and more cards are always in the works. Currently, there are over 150 questions, facts and formulas to review.