Mull

Pricing Open Mull

Name anything you want to understand.

Mull's AI writes you a short lesson as you read, with sources and a quiz, then brings it back so it sticks.

A chat answers once.
Mull teaches it, then brings it back.

Science, money, music, history. Or your own question.

Pick a subject or type anything. Mull writes for your level and suggests what to read next from the subjects you like.

Pick one, and the lesson writes itself while you read.

Written for you, as you read.

The next page arrives while you're reading this one. Every chart, stepper and quiz works the moment it lands. When it's done, a second pass rereads the lesson and fixes any wrong quiz answers.

  1. It looks things up first, and cites where each fact comes from.
  2. Diagrams and checks you can use, not pictures of them.
  3. Too dense? Tap Simpler and it rewrites from there.
  4. A short quiz at the end, then cards to keep. Try this one; it works.

A real Mull lesson, recorded October 23, 2026, replayed as you scroll.

New lesson

Planning the lesson…

This lesson is yours to try first, no sign-in: take the quiz above, step through the examples.

A tutor beside the text.

Highlight a sentence to have it explained, or ask about anything in the lesson. Turn on Guide me and it asks the questions instead, with a hint before every answer.

Guide me

  1. Why did cheaper coins hurt Rome so much?
  2. Good one to sit with. Before I explain: if every coin quietly holds less silver than it used to, what do you think happens to prices?

A sample exchange with Guide me switched on.

Then it makes sure you keep it.

When you finish a lesson, its key ideas become cards. Mull brings each one back just before you'd forget it, and the gaps keep growing.

Cards from the lesson above

    Days since the lesson 0

    Next review in 4 days

    With reviews Without

    How well you remember one card over six months Without reviews, recall decays steadily. With Mull's scheduled reviews, recall returns to full at each review and decays more slowly each time.
    How well you'd remember one card you get right each time it comes back. The review dates come from the same scheduler Mull uses.

    A little every day.

    Today shows the one thing to do next: finish a lesson, review what's due, or take the next step in a course. Tell the Teacher (Mull's study coach, which knows what you've learned) a goal, and it plans your week.

      Study plan

      What will you learn first?

      1. Sign in with Google
      2. What are you curious about?
      3. Your pace
      4. Your first lesson