Breef is where you write down what you learn from courses, books and lectures, and link ideas as you go. Over time your notes turn into a map of everything you know, grouped by project and coloured by subject, and you can replay how it grew.

Press record in a lecture and Breef writes it up into a study note, with the transcript underneath. A day after you write a note it comes back for review, then less often each time you remember it, and a project with an exam date gets you ready by the day. You can also ask your notes a question and see which ones the answer came from. Free to start, for students, researchers and anyone learning on their own.