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Évariste turns your notes into a living learning graph, then a Feynman tutor quizzes you on it one question at a time, finding the gaps in your understanding and bringing them back with spaced repetition.

Start studying free See how it works
Built for every subject

The same method, adapted to each discipline.

From mathematics to medicine. Évariste adapts the tutor, your notebook and the learning graph to match how each discipline is learned.

Évariste
Why does the integral diverge here?
Because near x=0x = 0 the integrand grows like 1/x1/x. Let's check the exponent together…
Notebook
Fourier series
Any periodic signal is a sum of sines and cosines:
f(x)=ancos(nx)+bnsin(nx)f(x) = \sum a_n \cos(nx) + b_n \sin(nx)
#calculus#linked
Review due
Linear algebra · recall when a matrix is diagonalizable
Review nowLater
The Feynman technique

Learn it by explaining it

Évariste's main method is the Feynman technique, named after physicist Richard Feynman. The principle is simple, "if you can explain an idea in plain words, you understand it, and the moment you can't is the moment you've found a gap."

So instead of feeding you answers, Feynman picks a concept from your learning graph and asks you to explain it. You write your explanation in a real markdown editor, LaTeX and all, then it shows you where the reasoning breaks down and helps you simplify it.

  • Explain it in your own words, in a full markdown and LaTeX editor
  • Feynman pinpoints the exact gaps you skated over
  • Review and simplify, one concept at a time, until it clicks
Feynman session · Linear algebra
Q 3 / 5
In your own words, why does a matrix with a zero determinant have no inverse?
Because it squishes space flat, so you can't undo it…
Concept to strengthen. Good intuition, but let's tie 'squishing' to rank. What is the rank of this matrix?
The learning graph

A living map of everything you know

Add a note, a PDF, or a photo and Évariste builds a knowledge graph from it, breaking it into concept nodes, each with its own summary and detail, then linking them to what you already studied.

Then, as Feynman quizzes you, a learning graph is created from your answers. It maps how you connect ideas and how solid each one really is, so you can see your understanding take shape.

  • A knowledge graph auto-extracted from your notes, PDFs and images
  • Prerequisite and related links, weighted by relevance
  • A learning graph, built from your quiz answers
Knowledge graph · 5 of 28 nodes
VectorspacesBasisLinearmapsRankInverse
Research

One question.
Every source. A cited answer.

Ask anything and Évariste searches scientific papers, the open web and GitHub simultaneously, routing to the right sources for your topic automatically. No separate Scholar tab, no manual bibliography.

Every source you add becomes a knowledge graph that grounds the answers in your own material. Results come with full citations, and with one click it generates a deep-dive document, code blocks and a visual research flow diagram.

  • Papers, web and GitHub searched in parallel, routed by topic automatically
  • Sources become a knowledge graph that anchors every answer
  • Cited answers, deep-dive documents, code blocks and a research flow diagram
Research Space
Research goal: Arithmetic geometry and rational points on curves
Why does the Mordell conjecture limit rational points on high-genus curves?
Searching· Papers Web GitHub
Knowledge graph built from 2 sources
[1] Finiteness Theorems for Abelian Varieties over Number Fields
Gerd Faltings · Abel Prize 2026
~3,400 cites
[2] Rational Points on Curves over Global Fields
Bjorn Poonen · Survey
~1,200 cites
Deep dive
Faltings' Theorem and the Mordell Conjecture
Research flow
Arithmetic geometry overview
Everything in one place

Six tools that work as one

Most study apps do one thing. Évariste connects your notes, languages, research and reviews so context follows you everywhere.

Study Spaces

Drop in notes, PDFs or even photos of a whiteboard and chat with a tutor that actually reads them. Everything you add becomes structured, reusable context.

Languages

A complete language studio with conversation, journaling, pronunciation through minimal pairs and shadowing, vocabulary, and a hands-free speak mode.

Notebooks

A markdown editor with first-class LaTeX, linked notes, YouTube videos and an AI assistant always at hand. Your thinking, structured and searchable.

Research

A multi-source agent that searches the web, scientific papers and GitHub, then hands back cited sources, deep-dive write-ups and code blocks.

Adaptive quizzes

Languages and Study Spaces have adaptive evaluations designed for how you learn. From listening comprehension, grammar and vocabulary to Feynman sessions, questions generated from your learning graph and active recall.

Spaced repetition

An SM-2 forgetting-curve engine schedules each review for the moment you're about to forget, with a visual decay curve so you can watch memory fade and recover.

Pricing

Start free. Upgrade when you're hooked.

Simple plans, no surprises. Every tier keeps your data yours and exportable.

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Everything you need to start learning seriously.

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  • Unlimited notebooks & LaTeX
  • 1 language track
  • Daily AI tutor messages
  • Spaced-repetition quizzes
  • Study & language streaks
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  • All languages, all drills
  • Multi-source research agent
  • Full learning graph & deep dives
  • Priority models

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Your next study session
starts here

Open Évariste, type what you want to learn, and let the workspace do the rest.