Don’t just learn maths.
Master the exam.
You get a question wrong. Someone says “you should have divided by 100”, you nod — and next week you do it again.
Lemmara tells you which mistake you just made, by name, the moment you make it. Then it shows you where every mark is won, and gives you the same question with new numbers so you can prove to yourself it has gone.
Cambridge and Edexcel IGCSE maths, built from 282 real past papers.
Works on any phone, tablet or laptop · No typing maths, ever
Three real questions, no sign-up. Get one wrong on purpose — that is the bit worth seeing.
Solid Geometry3D · drag meBuilt for the paper you are entered for
Tell us which paper you are sitting and the whole app moves to meet you — the questions, the mark schemes, the grade scale, even the countdown. You will never be shown a topic that is not on your paper, and never marked on a scale that is not yours.
Pick Core or Extended at sign-up and the app holds the line: a Core student is never shown an Extended-only topic, and the readiness score is measured against the Core code list, not the whole syllabus.
Two timed mock papers on your tier, graded against the boundaries your board publishes — on the scale your certificate will use.
“Exam-focused” is easy to say. We counted.
Plenty of apps say they are exam-focused. Before we wrote a single question, we sat down with every past paper we could find and pulled it apart, part by part. So what lands in front of you is weighted by what the examiners keep asking — not by what was easiest for us to write.
Cambridge and Edexcel, read question by question — not skimmed.
Every part carries its topic, command word, marks and difficulty.
The shapes that keep coming back, ranked by how often they appear.
The full 2025–2027 code list. Your readiness is measured against all of it.
What you actually get
Not a roadmap, and not a promise. This is what is in there today, counted the day this page was written.
Questions that behave like the exam, because they were built from it.
questions, and never the same twice
The numbers are generated fresh every time you meet a question, so you cannot pass by remembering that the answer was 42. You have to actually do it.
patterns the examiners keep reusing
We read 282 past papers and tagged all 12,403 parts, then ranked the shapes by how often they come back. You practise the ones that keep showing up first.
timed mock papers on your tier
A full paper against the clock, marked to the real blueprint and graded on the boundaries your board publishes — so the grade at the end means what it says.
Save anything for later
Bookmark a question mid-panic and come back to it when you have the head for it. Search works across questions, terms and chapters at once.
The whole course is open and free
An email and a password. That is the whole form — no card, no trial counting down at you. Everything below is free for pilot students until 6 November 2026.
- ✓All 765 questions, all 261 topics, all 37 chapters
- ✓Two timed mock papers on your tier, graded against published boundaries
- ✓Weak-spot drills that hunt down the topics costing you marks
- ✓The glossary, formula sheet and visual-aid gallery, always open
- ✓Progress, streaks and bookmarks saved across every device
Not ready to sign up? Try three questions first — no account needed.
We are still in the pilot, and we would rather hear what is wrong now than guess. If something is missing, or confusing, or just annoying — tell us and we will fix it.