Keep what you learn.

Save a word, a term or an idea as a flashcard. Lymi shows it again right before you’d forget. Open source, and free to use.

Get started

For anything you’re learning.

  • A new language

    Words and phrases from lessons, chats and books.

    Lymi for language learning

    Italiano · phrase

    In bocca al lupo!

    Good luck! Literally, “into the wolf’s mouth”

  • A course or lesson

    What you need to know for a class or an exam.

    Citizenship and driving tests

    Statistics

    p-value

    How likely data this extreme would be if nothing were going on

  • Work

    Terms from a new job or project.

    Programming

    idempotent

    Doing it twice has the same effect as doing it once

  • A hobby

    Anything you pick up and want to remember.

    Chess

    zugzwang

    Any move you make makes your position worse

Review less, remember longer.

Remember a card, and Lymi waits longer before showing it again. Forget it, and it comes back soon.

  • Reviewed with Lymi
  • Learned once, never revisited
How well-timed reviews change recall100%50%0%DAY 0DAY 30
Illustration only. Your review timing adapts to what you remember.

Recall

Recalling beats rereading

Lymi asks before it shows the answer. Trying to remember something makes it stick better than reading it again, as Roediger and Karpicke found in 2006.

Spacing

Longer gaps, longer memory

Spreading reviews out helps you remember for longer. In 2013, Dunlosky and colleagues rated testing yourself and spacing out practice as highly effective.

Remember first, then check.

Try to recall the meaning, then show it. Pick how well you knew it. Hard cards come back sooner, easy ones later.

Tonight4 due

Suomi · verb

kuulua

Reveal the meaning, then grade the recall.

A full flashcard in seconds.

Type the term, and AI adds the meaning, an example and the pronunciation. It never changes what you typed, and everything it wrote is marked.

Term
kuulua
Lesson
Meaning
To belong; to be heard
AI
Example
Haluan kuulua tähän joukkoon.
AI
Say it
KOO-loo-ah
AI

Make flashcards in ChatGPT, Claude or Gemini.

Ask your AI assistant to add a card while you chat. It shows up in Lymi, ready to review.

Lymi with AI assistants
That chess term you just used, add it to my deck.
Added to Chess, with the meaning and an example.Chess · newzugzwangAny move you make makes your position worse
And what am I due to review tonight?
Seven cards. Four Finnish, two chess terms, one from that signal-processing paper.

Connect your own tools.

Lymi is open source and has a public API. Add cards from a phone shortcut or a spreadsheet, or show what’s due on your own site.

Read the docsAPI referenceSource code
  • Shortcuts
  • Spreadsheets
  • AI assistants
  • Widgets
  • Websites
  • Your own app

Bring your existing decks.

Import your flashcards from Anki or Mochi. Decks, pictures and review history come too, so nothing you’ve learned starts over.

Moving from AnkiMoving from Mochi

Import

Spanish.apkg · 14 MB

What comes across

1,240cards
16,402past reviews
4decks
  • Cards keep the due dates they had in Anki.
  • 180 cards bring their pictures.

Free, open source, and yours

  • Free

    Lymi costs nothing. No trial, and no payment details to sign up.

  • Open source

    The code is public on GitHub, so anyone can see how Lymi works.

  • Your data is yours

    Export any deck to Anki, with its pictures and review history.