iPhoneNow on the App Store

Turn anything into a course.

Bring a question, a link, or a PDF. Learnfold builds a course on your iPhone. Every lesson ends with a way to go deeper, so the course follows your curiosity instead of a fixed syllabus.

See how it works ↓

Your sources. Your questions. One course you can come back to.

Course map showing side trails branching off a lesson, with the current page marked You are here

A lesson called What bees see with an interactive flower that switches between the human view and the ultraviolet pattern

How it works

From one question to a course you can shape.

You stay in charge at every step. Learnfold does the building.

New Course screen with the question What do bees see that I can't? typed in

01 · Start anywhere

Ask, paste, or attach.

A question is enough. Add a link or a PDF if you have one. You see the plan, and approve it, before anything is written.

Course overview for Senses You Don't Have, with a learning path, an Up next lesson, and a Continue course button

02 · Get a path

A course, written as you go.

Chapters appear on a learning path. Lessons are written section by section, so you can start reading while the rest is still on its way.

A lesson with an interactive flower comparing what humans and bees see

03 · Read and play

Lessons you can interact with.

Short pages, with interactive pictures where a picture explains it better than a paragraph.

Test your understanding card with a multiple-choice question about ultraviolet and Well understood feedback

04 · Check yourself

Check what you remember.

Optional checks at the end of a page: multiple choice, a written answer, or a guided discussion, with feedback on what you got right.

Screenshots from the current version of the iPhone app, with an example course. Learnfold uses AI to write explanations, so check anything important against a reliable source.

New · Open-ended exploration

Every lesson ends with a choice.

Most courses are a straight line. In Learnfold, the end of every page asks where you want to go next, and the course grows in that direction.

Go deeperMore detail on something this page mentioned briefly.
Go sidewaysA related or opposite idea that helps you understand this page better.
Zoom outThe bigger picture this fits into, and why it matters.
Or your own questionType it, or select a passage and ask Why? How? or for an example.

The end of a lesson with a Where next? section offering Go deeper, Go sideways, Zoom out, and your own question

Choose the next page.

Pick one of the choices and Learnfold writes that page for you, linked to the lesson it came from.

A lesson with a small banner saying a new trail is still being written, with an Open button

Keep reading while it writes.

New pages are written in the background. A small banner tells you when one is ready, so you do not have to wait.

Course screen with Your goals, Open threads, and a Tie it together button above the learning path

Always know where you are.

The course map shows every page you opened, with a “You are here” marker. Pin a page as a goal, see the questions you have not finished, or combine them into one page.

Ask mid-lesson

Ask the question you did not expect to have.

You are halfway through a lesson and something does not make sense. Ask right there. Learnfold answers with the page in context. Some answers stay in the chat, some become a page of their own, and you can always tell it which you want.

Try it here

One question leads to another.

Read a short page, pick where to go next, and watch the answer become a new page in the course. Then follow the next one.

A prewritten example. In the app, pages are written for you, and you can always type your own question.

Sound & musicExample

Same note. Different sound.

A piano and a guitar can play the same note, yet sound different. Part of that difference comes from the mix of harmonics in each sound.

What you get

A course that stays yours.

Ask about any passage

Ask with the whole page or a selected sentence as context. Discussions are saved, so you can reopen one later and pick it back up.

Test your understanding

Multiple choice, written answers, or a guided discussion. Get feedback, try again, or turn a wrong answer into a conversation.

Edit any page

Fix a sentence yourself, or ask the AI to rewrite a section. Every lesson and note is an editable page.

Bring your sources

Paste a link, or attach a PDF, notes, or a document, and the course builds on what you brought.

Web linksPDFsNotes & textMarkdown

Pick up where you stopped

Continue drops you back on the exact page, and the spot on it, where you left off. Courses and progress can sync across your devices through iCloud. A Mac version is on the way, with a reading workspace, an outline, and a side discussion.

AI choices

Choose which AI writes your course.

An AI writes your lessons. You don't need to set anything up: Learnfold Cloud works right away. If you prefer, choose another option in the app, for each course.

Easiest

Learnfold Cloud

Learnfold's own AI service. Ready to use, with nothing to set up: no account or API key.

Learnfold Cloud plan, $5/month

Private

Apple Private Cloud Compute

Apple’s AI, run on Apple’s private servers (Private Cloud Compute). Needs a supported iPhone with Apple Intelligence turned on.

Any plan, from $1/month

Your key

Codex

OpenAI’s agent, using your own OpenAI API key (a key from your OpenAI account) or another compatible AI service. OpenAI charges you for its use. Course files stay on your phone.

Any plan, from $1/month

Your server

Hermes

An AI agent that you run on your own computer or server. Learnfold connects to it, and it writes the course.

Any plan, from $1/month

Questions worth following.

Plain, sourced explanations, and practical guides to learning with AI.

FAQ

A few answers first.

What is Learnfold, in one line?

An iOS app that turns a question, link, or document into a course you can read, explore, check yourself on, and expand.

Do I need to bring my own material?

No. A question is enough. Links and documents give the course something concrete to build from, but they are optional.

Does it build the whole course at once?

No. You approve a short plan first. Then lessons are written section by section, as you need them, and explorations are written in the background while you keep reading.

Can I get back to the original lesson?

Yes. Every explored page links back to where it came from, the course map shows each trail with a “You are here” marker, and Continue returns you to the route you were following.

Which AI writes my course?

You choose. Learnfold’s own AI needs no setup and comes with the Learnfold Cloud plan, with daily usage limits. You can also use Apple’s Private Cloud Compute on supported iPhones, Codex with your own OpenAI API key, or Hermes on your own server. See what each plan costs.

Can the explanations be wrong?

Yes. Learnfold uses AI to write explanations, and AI makes mistakes. Treat it as a tutor rather than a textbook, and check important facts against a reliable source.

What does Learnfold cost?

In the app, you can read the practice course and your saved lessons without paying. To write courses with AI, you need one of three monthly App Store subscriptions:

Learnfold Plus, $1/month. Use Apple’s Private Cloud Compute on supported iPhones, or your own AI service: Codex, Hermes, or your own API key. Your AI service may charge you separately.
Learnfold Cloud, $5/month. Everything in Plus, and Learnfold’s own AI, with nothing to set up. Daily usage limits apply.
Learnfold Studio, $19.99/month. Everything in Cloud, and Build in motion: a lesson becomes a narrated whiteboard video that you can pause to ask questions.

Prices are in US dollars. The app shows the price in your currency before you pay. A subscription renews every month until you cancel it in your Apple Account settings. Apple handles billing and refunds. Full details are in the terms, section 3A. The Mac version from this website has its own one-time license; see pricing.

When can I use it?

Now. Learnfold is on the App Store for iPhone. Download it from the App Store.

There is always another question

Bring the first one.

Learnfold is on the App Store for iPhone.