Ideas you
can watch
Kerfox is a study app with lessons you watch happen, a plan that works back from your exam, and practice marked out of its marks. University courses first, with GCSE and A-Level on the way.
Lessons that move
Seeing an idea happen shows you why it works, not just that it does. The intuition comes first, so the equations make sense when they arrive.
Every topic fades at its own pace
Each topic you meet has its own memory curve, so whatever is about to slip before your exam is spotted early, while there is still time to act.
Planned back from your exam
Reviews are timed back from your exam date, each one landing just as its topic starts to slip, so every topic is at its strongest on the day.
Tested against bad weeks
Thousands of possible weeks are simulated, missed days and slow weeks included, and the plan whose worst cases hold up best is the one you get. No guarantees, just your best chance.
Intensive, for the run-up
Deciding what to revise each day costs willpower you need for the revising. With every day worked out up to your exam, you just start the next block, paced so you arrive at your best rather than worn out.
Your real week, with sleep untouched
Blocks go only where you are free, straight into your phone’s calendar with reminders. Miss one and the plan adapts around it. No guilt.
Four ways to practise
Each is built for a different job. Pick the one that fits the time and the place you have.
Drill, marked out of its marks
Long exam-style questions, with one arc of the border for every mark. Then the answer, the numbered working and why it works.
Teach it, with the notes shut
Explain an idea in your own words to someone new to it, and your explanation is checked against the points a good one makes.
If you want to master something, teach it.
Lightning, against the clock
Quick questions in your head before the ring runs out. Answering against the clock trains you to recall and work things out faster, the speed an exam rewards. No pen, one hand, on the go.
Memorise, until it stays
For building new concepts from the ground up. Each new term comes back until you have got it right on 3 different days, then further and further apart.
Your notes, made into a module
Upload notes, slides or photos and AI builds lessons and all four kinds of practice from them, checked by the same gates as every course.