Revise A-Level and IGCSE is a small, free app which can help you revise for your exams. It contains facts about your subjects which you can learn, and then try quizzes to see how much you have learned. You can even email your teacher to show them your progress! Current subjects include: Cambridge (CIE) A2 Physics. Cambridge (CIE) AS Physics. Cambridge (CIE) IGCSE Physics.