OUR MISSION
The best way to revise is known.
Kerfox is an attempt to hand a student the good version, free - at university first, and at A-Level and GCSE after it.
WHY THE GAP IS THERE
Almost nobody is taught it.
50 years of research says what actually moves a grade, and almost none of it reaches the person sitting down with a textbook the night before an exam.
The findings themselves are old, replicated and boring. Spread your practice out rather than stacking it. Answer from memory rather than re-reading. Mix the confusable things together rather than doing 20 of the same. Work through a solved example before you try one alone. None of it is controversial and all of it is the opposite of what revision usually looks like.
The reason it does not reach people is not that anybody is hiding it.
Doing it properly is admin.
Knowing which topic is about to slip, keeping the two things you keep confusing next to each other, pitching the next question at the difficulty where you will just about get it - that is a scheduling problem, run daily, across everything you are studying. Nobody revising for 6 subjects is going to keep that ledger by hand, and they should not have to.
A phone is very good at scheduling problems.
So Kerfox does the admin and hands back the studying: it decides what comes next and when, marks what you write against the marks a board would give it, and gets out of the way. What is left for you is the part that was always the point.
And it is free where it counts, which is not generosity so much as arithmetic. The students who most need somebody else to run the schedule are the least likely to be able to pay for one.
What we hold ourselves to.
5 of them, and every one names the page where you can check whether we are keeping it. A list of values nobody can audit is a list of adjectives.
Free where it counts
Every lesson, every question and the memory engine behind them are free, and the plan is for that to stay true. An optional Pro plan in the app adds a few extras, and nothing you need in order to revise sits behind it. A donation buys no feature, no seat and no priority - it buys the thing staying free for somebody else.
Support usNothing ships unchecked
61 separate checks run over the whole curriculum before a build is allowed out, and every one of them fails the build rather than printing a warning. A gate that warns is a gate somebody scrolls past.
What gets checkedThe method is public
Every design decision here is traced to a published finding, cited and linked, including the several that cut against us. If you want to disagree with how Kerfox teaches, we would rather hand you the argument than make you guess at it.
The researchDifficulty is the point
If it feels easy you are probably not learning much. Questions are aimed at the band where you get roughly 8 in 10 right, on purpose, because an answer you were certain of teaches almost nothing and one you could never reach teaches nothing at all.
How the pairing worksWe say what we do not know
Nobody has run a study on Kerfox, so the page where an efficacy claim would go says so in its first line and puts a zero where the headline number belongs. We would rather be caught having said it than caught not having.
Our own studies
3 levels, 3 different jobs.
Kerfox starts at university and grows down into A-Level and GCSE, and it would be easier if that were one thing done at 3 sizes. It is not. What a student is being marked on changes completely from one level to the next, and the app has to change with it.
University
Opens firstWhere Kerfox starts. There is no mark scheme to be faithful to here, and the job becomes derivations, real problem sets and the honest difficulty of the thing itself.
- Physics
- Lasers and Quanta · Electricity and Magnetism · Motion and Relativity · Energy and Matter · Waves, Light and Quanta
- Philosophy
- Logic, Reason and Argument · The Mind, the Brain and Consciousness · Ethics · Classical Indian Philosophy: Self, Knowledge, and Liberation
A-Level
Coming soonWritten against the 4 boards’ own specifications - AQA, OCR, Edexcel and WJEC - rather than against a general idea of the subject, because a topic one board examines and another does not is a term of revision either wasted or missing.
GCSE
Coming soonWhere the mark scheme starts crediting particular words rather than correct ideas, which is a skill nobody teaches on purpose and everybody is marked on.
WHERE IT IS UP TO
Kerfox is in its first testing round.
The waitlist is how the first seats go out. Nothing is charged for and nothing is promised beyond one email on the morning it opens.