The AI tutor for your own textbook chapters. Ask it anything. It shows you the page.

What's the difference between an epidemic and a pandemic?

An epidemic is a rise in disease cases above what is normally expected in a particular population and area. A pandemic is an epidemic that has spread across several countries or continents, usually affecting many people.

SourcesPage 72Page 73

Add a chapter, slides or notes. Hemle teaches it in short sessions, quizzes you as you go, and points every answer to the passage it came from.

Real answers from Hemle, recorded 14 and 27 October 2026 on Lesson 1 of Principles of Epidemiology in Public Health Practice, a public-domain CDC course. CDC doesn’t endorse Hemle.

Free for your first chapter·Never used to train AI

It reads every line. Of your own chapter.

Add a chapter and Hemle works through it page by page, line by line.

It keeps what matters. With the page it came from.

On page 2, the definition the lesson starts from, marked and kept with its page.

An AI tutor that asks. And makes you explain it back.

Malet teaches one idea at a time, then asks for it in your own words, with the pages to check.

Flashcards, from the same lines. Each one names its page.

Five cards from one concept, every one pointing back to page 2.

Quizzes that ask how sure you are. Before they tell you.

Being sure and wrong is the mistake worth reading, so Hemle asks first.

Spaced repetition, on the right day.

One review, on Oct 164×longer above 90%. 2.3 days became 9.5.

One chapter in. Everything you need to keep it.

Free for your first chapter·No card

An AI tutor that cites the page, and says when your chapter doesn’t.

“The provided evidence does not state a numerical R₀ for measles.”

Hemle, asked the R₀ of measles about a chapter that doesn’t give one. It went on to show what the chapter does say about how measles spreads (p. 65). Recorded 27 October 2026.

  • Every reply lists its pages. One tap opens the passage, highlighted.
  • Wrong? Trust the page. Report it from the card or the answer.
  • Your file stays yours. It isn’t used to train AI, and you can delete it any time.

Turn any PDF or PowerPoint into a tutor, flashcards and a quiz.

Textbook chapters, lecture slides or your own notes, in any subject. Three we tried:

Walk in ready.

or drop a file anywhere here · PDF, Word or PowerPoint up to 20 MB

Free for your first chapter·No card·Never used to train AI

Before you start

Something else? Write to support@hemle.app.

What does it cost?

Your first chapter is free, and you don’t need a card to start. After that, Pro is $9.99 a week or $14.99 a month, and Max is $44.99 a month. Each plan’s limits are shown before you pay, and you can cancel at any time.

What can I upload?

A PDF, Word file or PowerPoint deck up to 20 MB: a textbook chapter, lecture slides or your notes. For a textbook, upload one chapter rather than the whole book.

How is it different from asking a chatbot?

It teaches from your own file. Every reply lists the pages it draws on, it asks you questions as it goes, and each concept comes back for review before you’d forget it.

Can it be wrong?

Yes. Malet is an AI tutor and can make mistakes, which is why every reply names its pages. When something surprises you, read the page.

Is my file private?

Your file stays in your own library, and it isn’t used to train AI. You can delete it, or your whole account, at any time.

Who is Hemle for?

Adults 18 and over in the US who learn from their own material, such as university students.