Skip to main content
Knotree
Now in public beta

One place for everything you learn.

Notes, docs, homework, spaced repetition, and an AI that teaches — not cheats. Built for students, teachers, and curious minds.

Get started freeSee how it works
12k+learners
4.9avg rating
Freeto start
Live in your workspaceapp.knotree.com

Eigenvalues & Eigenvectors

Linear Algebra · Chapter 5

AI suggests:
#linear-algebra#eigen#matrix
Flashcards3 / 5
Question

What is an eigenvalue?

Answer

A scalar λ such that Av = λv for some non-zero vector v.

AgainHardGoodEasy
Today's queue
25

25 cards · 10 min

3 decks · 92% recall

3 decks · due todaySyncing
Three promises

What Knotree commits to — every single day.

  1. 01Promise 01 of 03

    Everything in one place.

    Notes, docs, homework, and your review queue — one workspace. No tab-hopping, no lost links, no context switching.

  2. 02Promise 02 of 03

    AI that teaches, not cheats.

    Knotree summarizes, suggests tags, links related notes, and generates flashcards. It helps you understand — it won't do the work for you.

  3. 03Promise 03 of 03

    Made to be read.

    Fraunces headings, generous whitespace, a warm paper background, and a 62-character line length. Reading and writing feel like a pleasure.

Everything you need

Four tools, one workspace. Zero friction.

From the first draft of a note to the final review session — Knotree has every stage of learning covered.

01Notes

Capture, then understand.

A distraction-free editor with a slash menu for blocks — headings, callouts, math, code. AI generates a summary and flashcards while you write.

Eigenvalues
#math#eigen
3–5 flashcardsauto-generated per note
02Flashcards

Flip until it sticks.

AI generates 3–5 cards per note. Review with spaced repetition — each answer rated Again, Hard, Good, or Easy. Never re-read what you already know.

Question

What is an eigenvalue?

Tap to reveal
AgainHardGoodEasy
92% recallafter 3 review sessions
03Homework

Due dates without dread.

Assignments with progress tracking, due-date alerts, and teacher feedback — in a single clean list. Urgent items glow warm, never red.

Essay: Climate Change
Due in 18h
62% done18 / 24 submitted
24h nudgebefore every deadline
04Study

Review in 10 minutes.

Spaced repetition surfaces the right cards at the right time. Pair with a built-in Pomodoro timer and a weekly study chart to keep momentum.

25
Today's queue25 cards · 10 min3 decks · 92% recall
Spaced repetitionalgorithm built in
Built for everyone

Learning looks different for everyone.

Knotree adapts to your role. Switch between Student, Teacher, and Reader mode — same account, different view.

From lecture to mastery. Take notes in class, get AI-generated flashcards, track homework due dates, and review with spaced repetition — all in one place.

  1. 1

    Capture

    Open a new note during or after a lecture. Type freely; / brings up formatting blocks.

  2. 2

    Enhance

    Knotree silently generates a summary, suggested tags, and links to related notes.

  3. 3

    Review

    3–5 flashcards are auto-generated from your note. Approve or edit them in one click.

  4. 4

    Master

    Tomorrow's queue surfaces those cards. Review for 10 minutes and the knowledge sticks.

82%of users score higher after 2 weeks

Good afternoon, Alex.

Three subjects to review today.

Today's review

25 cards

~10 minutes · 3 decks · 92% recall

  • Eigenvalues
    #math
    Today
  • Photosynthesis
    #biology
    Yesterday
  • Cold War origins
    #history
    2 days ago
One-hand reach

Everything reachable. Mouse optional.

The top 80% of actions are one keystroke away from anywhere in Knotree.

  • Command palette⌘K
  • New note⌘N
  • Ask Knotree AI⌘/
  • Settings⌘,
  • Toggle sidebar⌘\
  • Show all shortcuts?
Early users

A quiet kind of consistency.

I used to have notes in four apps, assignments in another, and flashcards in a third. Knotree is the first tool that actually holds everything together.

MT
Minh T.
Computer Science student
Vol. 04
  • SK
    Sara K.
    Pre-med student

    The AI panel is the best part — it quietly suggests tags and flashcards without interrupting me. It's a thoughtful assistant, not a chatbot.

  • JR
    James R.
    High school teacher

    I set up assignments and track submission progress without a single spreadsheet. My students love the clean due-date view.

  • LA
    Leila A.
    Lifelong learner, product designer

    The reading surface is the best I've found for long articles. Highlights stay linked to the source, and I can ask the AI a question mid-read.

CodaReady when you are
Free to start · No credit card

Start learning in clarity.

Join 12,000 students, teachers, and readers who found one home for everything they learn.

Get started freeBook a demo
  • SOC 2 ready
  • WCAG 2.2 AA
  • GDPR compliant
  • 99.9% uptime
Fin · Begin