Ostrol
Start solving
The most accurate math solver · verified self-checks

Math you can trust,
checked before it reaches you.

Type, paste, or photograph any math problem — from algebra to multivariable calculus — and get a clear step-by-step solution that is independently checked for accuracy before you see it.

Start solving freeSee pricing

2 free solves · no credit card · upgrade anytime

Sample problemVerified · self-check passed
How it works

Three steps. Every solve.

Built around one stubborn principle — never show an answer we haven't double-checked.

01
Step

You ask, any way you like.

Type the problem, paste a screenshot, snap a photo of your textbook, or upload a PDF. We read all of them.

02
Step

We choose the right engine.

Algebra goes to the symbolic CAS. Calculus routes through the analyst. Word problems open a reasoner. You don't pick — we do.

03
Step

Every step is verified.

Before you see a solution, an independent checker re-derives it from scratch. If they disagree, we go back. You only see answers that hold up.

100%
pass rate, verified test set
4.8M
problems solved this year
0.3s
median time-to-first-step
24
languages, on the way
Pricing

Free, until you need more.

Two free solves. No credit card. Upgrade only when the work earns it.

Frequently asked

  • How is this different from ChatGPT?›

    Most AI tools give you a fast answer based on probability and language patterns, which can sometimes look correct even when the math is wrong. Ostrol solves the problem in a different way: it works through the exercise step by step, then checks the result with a separate calculation engine before showing the final answer. If there is any mismatch, we don't guess — we flag it and keep the solution consistent.

  • Will it just give my students the answer?›

    It shows the working. Every solve walks through the steps with the reasoning visible. Students who read the solution build intuition. Students who copy answers see no improvement. We never optimize for shortcuts.

  • What level of math does it handle?›

    Arithmetic through multivariable calculus, plus linear algebra, statistics, probability, discrete math, and the math you see in early physics and economics courses. Long exam questions with several parts are supported.

  • Which languages are supported?›

    English and French. Math notation follows the convention of the language you choose.

  • Does it work on phones?›

    Yes. You can type, paste, photograph a problem from a phone, tablet, or laptop. The solution renders the same way on every screen size.

  • Is my work private?›

    Yes. Your problems stay in your private library. We do not sell them. We do not share them. We never train models on student work. School admins can turn off public sharing for the whole class.

  • Can I cancel anytime?›

    Yes. One click in billing settings cancels the plan. You keep access through the end of the period you already paid for.

  • Do schools get custom pricing?›

    Yes. Talk to sales and we will put together a quote within two business days.