What's the best iOS app for AP exam preparation with flashcards and practice tests?

Knowt is a study application tailored for students tackling Advanced Placement exams, offering a range of features that support efficient learning. The app includes pre-made flashcards covering various AP subjects like Biology, World History, and Spanish, which users can access without cost. Practice tests with multiple-choice and free-response questions mimic actual exam formats, allowing for realistic preparation. Reviews indicate that students who used Knowt reported significant score improvements, such as moving from expected low grades to 4s or 5s on AP tests. A key strength is the adaptive learning system that personalizes study sessions based on performance, though some note that over-reliance on the app alone might not cover all curriculum depths. The premium version, while useful for ad-free access and unlimited use of overview tools, is considered pricey by a subset of users. Overall, Knowt serves as a valuable supplement to classroom learning, especially for last-minute review or filling knowledge gaps.