Lex

A language-learning workspace for people who read and write.

Leveled reading, AI essay feedback, and a vocabulary that grows from the texts and essays you actually work on. One tool, thirty-four languages, no flashcard treadmill.

The apps you've tried aren't teaching you the language.

They teach you the app.

Lex

One place for reading, writing, and vocabulary — each one feeds the next.

Read leveled texts and save the words you meet. Those saved words come back as exercises. Write essays with the vocabulary you've built and get feedback that points you to the next thing to fix. No juggling, no silos.

Read. Write. Practice.

Three parts of one workspace — each feeding the next.

The language you're learning is probably already here.

Thirty-four languages, all shipped with curated starter content. Tap any to see where it's spoken.

One quiet place, instead of three loud ones.

How Lex compares to Duolingo, Anki, and LingQ.

FeatureLexDuolingoAnkiLingQ
Read real texts at your level
Writing with AI feedback
Spaced repetition review
One calm place — no juggling

Check it out before signing up.

Paste an essay in any of 34 languages and we'll estimate your CEFR level with specific corrections — no signup, no card.

  • CEFR level estimate

    A1 through C2, with a short justification.

  • Specific corrections

    Real excerpts from your essay with suggestions.

  • What's working

    Strengths in structure, vocabulary, and voice.

Three tiers. Pick whatever fits.

The 3-day trial covers everything. After that, pick a tier or stop — Lex never charges you without you explicitly subscribing.

Basic

$4/mo

  • Build vocabulary in 34 languages
  • Foundations reference — alphabet, phonetics, and grammar essentials for all 34 languages
  • 5 exercise modes — flashcards, match-pairs, fill-blanks, multiple choice, typing
  • Themed mini-units that build skills step by step
  • 3,000+ curated starter words across French, Spanish, Italian, German, English
  • Per-language CEFR tracking from A1 to C2
  • Word tags, bulk actions, search and card / table views
  • Light and dark themes
  • No ads. No tracking. Ever.
  • Export your vocabulary as CSV
  • Essay writing — in Pro
  • Reading section — in Pro
  • AI features + Foundations audio — in Max
Choose Basic
Most popular

Pro

$9/mo

  • Everything in Basic
  • Write essays with 70+ curated prompts across 7 topics
  • Custom essay topics — write about anything you want
  • Distraction-free essay editor with drafts and word count
  • Reading section — paste articles, emails
  • One-tap word lookup + phrase selection while reading
  • Hover any saved word to see its translation instantly
  • Save vocab on the fly as you read
  • Curated reading library — 60+ leveled texts
  • Filter reading by CEFR level
  • Markdown export of essays and reading texts
  • Print-friendly layouts
  • AI essay feedback — in Max
  • AI reading-text generation — in Max
  • AI word translation — in Max
  • Sentence-translation exercise — in Max
  • Foundations audio playback — in Max
  • Smart word recognition — in Max
Choose Pro

Max

$19/mo

  • Everything in Pro
  • AI essay feedback — up to 20 every day, with mistake list and CEFR level estimate
  • Essay feedback saved with each essay so you can track your progress over time
  • AI prompt generation — up to 30 every day, calibrated to your CEFR level
  • AI reading-text generation — up to 30 every day, your topic, length and level
  • AI word translation in reading — up to 500 every day, with native example sentences
  • AI sentence-translation exercise — build sentences from your vocab, graded in both directions, in all 34 languages
  • Foundations audio — native pronunciation for every letter, sound, and example, in all 34 languages
  • Smart word recognition — saved 'to call' automatically matches 'calling', 'called', 'calls' as you read
  • Priority support
Choose Max

No card required for the trial. Cancel anytime from the billing portal.

The things people usually ask first.

  • No. The trial lasts three days and doesn't require any payment details. If you want to keep using Lex after, you can subscribe at $4–$19/month. Nothing is charged automatically.
  • Yes. Cancel from the DodoPayments billing portal in two clicks. You keep access until the end of the period you've already paid for, then it stops cleanly — no follow-up charges.
  • All 34. Every language ships with about 100 curated vocabulary entries at each of six CEFR levels (A1 through C2), fifteen leveled reading texts, and essay prompts across seven topics.
  • Yes. A1-level vocabulary and short reading texts are calibrated for first-time learners. You don't need any prior knowledge to start a language from scratch.
  • Basic ($4) is vocabulary and exercises in all 34 languages. Pro ($9) adds the writing and reading sections. Max ($19) unlocks the AI features — essay feedback with a CEFR estimate, AI text generation, smart word translations — all with generous daily caps so you can actually use them.
  • Essay feedback, prompt generation, and word translations are powered by OpenAI's models. Your essays are sent to the model only when you ask for feedback — never to train it.

Three days of Lex, free. No card.

Pick a language, save a few words, write your first essay. If it isn't for you, the trial ends on its own.