Show your working. Felt marks every line, like an examiner.

Drop in your notes, slides or just a topic, and Felt turns them into a course of short lessons and exercises. AI writes the lessons. Fixed rules do the marking.

Waitlist perks: early beta access and a founding price. No spam.

Long problems, marked line by line. Each step earns credit, plus credit for carrying an earlier slip through correctly, like an examiner's method marks.

Marking

Marked by rule · no AI

Try a slip:
?
Type an answerThen press Check.
Try it

Common mistakes, named without AI.

Wrong sign, fraction upside down, squared instead of square root, off by a power of ten. Type an answer, or tap a slip.

Why not just ask a chatbot?

A chatbot can mark the same answer right once and wrong the next time. Felt's rules give the same mark every time.

It names the slip.

A chatbot says "not quite". Felt says "wrong sign in line 2" and still credits the lines after it.

It keeps going.

A chat ends. Felt keeps your course, your streak and a review queue of what you missed.

Making a course

Your files become a course.

Drop in PDF, Word, text, images, or just a topic, and you get units of short lessons and exercises.

Tell it about your exam first.

A short form asks what the course is for, the level, the size, the exam, the problem types and the exact number of exercises, and shows a cost estimate before anything is written.

A second AI fact-checks every new course.

It reads each lesson before you do. It can still miss things, so every exercise has a "this is wrong" button.

Your courses are files you keep.

Plain files in a folder you own, not locked inside an app. Edit one and it reloads live.

Help while studying

"Ask why" opens the Coach.

Felt's AI tutor opens with that exact exercise attached. It's there on correct answers too.

One tap turns an answer into practice.

A Coach answer becomes a practice question in your review queue.

Unit 1 · Alkenes · Lesson 2

Ethene's holds two shared pairs. One is a ; the other is a , which sits above and below the plane of the molecule. The π bond is weaker, so it breaks first in an .

Select any words, or tap an underlined term.

Try it

Select any text.

Get What's this, Simpler, Example, Ask, or Question. Select some words in the lesson, or tap an underlined term.

Figures

QuantityPrice S D
+0%
P = 10.0Q = 40.0
Try it

Figures you can move.

Plots, bar charts and diagrams, with sliders, draggable points and readouts that update. Drag the yellow point.

Studying

A placement test.

Skip what you already know.

Day streak and best streak.

No lives to lose.

Coming later Planned

Accounts and sync.

Across your devices, through our servers.

Use your own Claude API key.

No Felt fee and no Felt limits: you pay Anthropic directly for what you use, and Felt never sees the key.

Share a course by link.

People who open it study for free.

Starter courses and a library.

Pick a ready-made course instead of starting from your own files.

Waitlist perks.

Early beta access plus a founding price.