The test feature is perhaps the best feature. Each app comes with two separate tests – one Foundation and one Higher. These randomly pluck assessment questions from a larger databank, so that you are unlikely to ever encounter two identical tests, and then the tests analyse your answers when you’re finished. Furthermore, these diagnostic tests even tell you what your trouble areas are, which topics you ought to devote more time to, and then gives you direct links to the respective revision sections. When you feel that you have brushed up on your maths enough, give the test another go and see how you have improved!