A tutor, not a quiz app
Euclid talks with you. It explains the why behind every step, adapts to how you think, and deploys interactive problems exactly when they'll help — the way a great human tutor would.
SAT · Math
Wrong answer? Euclid finds the step that broke.
Free SAT apps show you the worked solution. Euclid works out where your work went wrong — in conversation, on problems pulled for your level, not picked off a list. All four College Board math domains, Algebra through Trigonometry.
Free while Euclid is in early access · no credit card to start
1,600+ vetted problems in Math alone · Unlimited more, each re-solved by a second model before you see it · Every problem at your level · Server-graded, so it can't call a wrong answer right
In action
A real session, not a pitch deck.
You miss a sign. Euclid doesn't paste the full solution — it finds the broken step, makes you restate it, and deals another problem on the same skill.
Euclid · Math
You
I got −3 but the answer is 3. I multiplied both sides by −1… did I just drop a sign?
Euclid
Almost — walk me through what you did to the inequality direction when you multiplied by −1.
You
I flipped… wait. I only flipped the left side. Not the whole inequality.
Euclid
There it is. Multiply or divide an inequality by a negative → the entire relation flips. Try this one cold:
Linear inequalities · Band 3
Solve: −2x + 5 > 11
- A) x > −3 — sign trap
- B) x < −3 — correct
- C) x > 3
- D) x < 3
Euclid
−2x > 6, divide by −2, flip → x < −3. Same skill, different numbers — until the flip is automatic. Want one more, or move on?
Illustrated from a typical session · Your real chats adapt to your mistakes
The honest comparison
Use the free one. Then come here.
The free official prep is genuinely good, and you should take its practice tests. It's a problem bank with videos: it shows you the worked solution. What it can't do is notice that you keep flipping the inequality sign, ask what you were thinking, and build the next three problems around exactly that. That's not a problem bank. That's a tutor.
| Feature | Euclid | Static question banks |
|---|---|---|
| How much there is | 1,600+ vetted problems — plus unlimited new ones, written and checked the moment you need them | A fixed set. When you've done it, you've done it |
| Explanations | Written for the mistake you actually made | One canned write-up, written for everybody |
| Difficulty | Every problem pulled at your current level, skill by skill | A fixed set, same order for every student |
| When you're stuck | Ask. It answers — then asks you something back | Rewatch the video |
| Grading | Server-graded. It cannot tell you you're right when you're wrong | Right / wrong |
| Problem quality | Every problem in the bank vetted by two independent AI models; every generated one re-solved before you see it | Trust the brand |
| Memory | Brings your weak skills back right before you'd forget them | None |
| Pressure | None. Ever. | Streaks, XP, leaderboards |
Why Euclid
A different kind of tutor.
It can't fake it
Every checkable problem is graded on the server against a stored answer — never by the chat guessing. An AI tutor that cheerfully agrees with a wrong answer is worse than no tutor. Euclid is built so it cannot.
No streaks. No guilt.
We don't care about yesterday's missed session. No leaderboards, no XP, no counterfactual “you should be further along.” Every session starts where you are. The floor is never zero.
Everything the section tests
The four domains, covered end to end.
01
Algebra ~35% of the section
Linear equations and inequalities, systems, linear functions, and the word problems that hide them.
02
Advanced Math ~35% of the section
Quadratics, polynomials, exponentials, radicals and nonlinear systems — plus the Desmos traps.
03
Problem-Solving & Data Analysis ~15% of the section
Ratios, rates, percentages, statistics, probability and reading data out of a chart.
04
Geometry & Trigonometry ~15% of the section
Triangles, circles, volume, right-triangle trigonometry and coordinate geometry.
Adaptive difficulty
Euclid meets you at your level and moves with you — say “push me harder” or “take it easy” any time.
Rapid Fire Questions
A focused practice mode that pulls fresh, vetted problems across your weak spots, one after another.
Spaced repetition
Concepts come back at the right moment, so what you learn actually sticks.
Private by design
No audience, no sharing, no record of your bad days. Just a tutor and a student, working.
Stop guessing. Start knowing why.
Start free today and feel the difference in your first session.
Free while Euclid is in early access