Lex

A tutor that starts
from your words.

Lex is a chat in its own tab. Instead of teaching from a textbook, it works with the words you have saved: it explains them, tells similar ones apart, tests you and helps you use them.

Checked against the app on 3 October 2026.

The Lex tab: a short story written with the learner’s saved words, and the Ask about your words box
Plan
Pro; free in Persian notebooks
Knows
Your most recently saved words
Where
Web and Android
Connection
Needed

What you can ask

Open the Lex tab and type in Ask about your words⁠, or tap one of the three openers. A few ideas:

  • “Test me on my newest words”

    A quiz in conversation, one word at a time, using the words you saved most recently.

  • “Which of my words are easy to mix up?”

    It finds confusable pairs among your words and tells them apart with examples.

  • “Use my hardest words in a short story”

    Your words in context, in a story you can read and ask about.

  • “Is “I’m fed up of it” correct?”

    It checks a sentence you wrote and explains the usual form.

  • از کلمه‌های جدیدم ازم امتحان بگیر

    Written in Persian, so Lex answers in Persian, right to left.

  • “What is the difference between “credible” and “credulous”?”

    A comparison with examples, then a quick check that you have it.

What Lex knows

Lex sees your notebook’s languages and your most recently added words in the chat’s notebook, each with its first meaning, one example and the box it is in, plus the recent conversation.

Sees

It sees

Your languages, your most recently added words in this notebook (first meaning, an example and the box), and the recent conversation.

Does not see

It does not see

The whole of a large notebook, your private notes, your other notebooks, or the web.

What it will not do

  • It does not hand out lists of new words to learn: the words stay yours.
  • It never invents a word, meaning or example and presents it as one of yours.
  • It declines questions that are not about language or your notebook.

Your language, both directions

Lex answers in your meaning language unless you write in another. Each answer is laid out in the direction of its script, so Persian, Arabic and Hebrew read right to left, and the input box turns with the first letter you type. You can also speak your question.

Lex using saved Chinese words in a short story to practise reading
A story built from saved words

Conversation details

  • Answers appear as they are written and keep going if your phone locks.
  • “Answer again” writes a new answer and keeps the old one.
  • Copy an answer, and rate it with a thumbs up or down and a reason.
  • Past chats stay available; delete any chat, after a confirmation.

Plan and requirements

Plan
Pro. A notebook with Persian on either side gets it free.
Where
web, Android
Connection
needed

Lex lives inside Lexpad. To work with your notebook from ChatGPT or Claude instead, connect Lexpad to your assistant; that is free on every plan.

Good to know

Questions

Does Lex know my whole notebook?

No. It sees your most recently added words in the chat’s notebook, with their first meaning, an example and their box.

Will Lex give me new words to learn?

No. It works with the words you saved and does not hand out word lists.

Is Lex the same as connecting ChatGPT or Claude?

No. Lex is Lexpad’s own tutor, part of Pro. Connecting ChatGPT or Claude lets your own assistant read and change your notebook, free on every plan, and never uses Lexpad’s AI.

Lexpad

Your next word is worth keeping.

Lexpad is free to start, on the web and on Android. Bring the words you meet.