Most students highlight.
Few actually understand.
There is a gap between reading and knowing. Between familiarity and fluency. Between a highlighted page and an idea you can explain.
Passive highlighting
You mark the page but not your memory. Colour-coded notes don't create understanding — they create the illusion of it.
Rereading without retention
You've read the same paragraph four times. The words go in. The meaning doesn't stay. Familiarity isn't the same as knowledge.
No way to test yourself
You don't know what you don't know until the exam reveals it. Passive study leaves too many gaps.
Lost in long PDFs
300 pages. No guide. Dense academic language with no one to ask when a paragraph stops making sense.
Pheyn closes the gap. It turns your PDF into an active conversation — one where you can ask, push back, test yourself, and actually walk away knowing the material.
From upload to understanding.
A learning loop designed to turn passive reading into active knowledge.
Upload
Drop in any PDF — textbook, paper, lecture slides, research article.
Read
Navigate with a clean, focused reading environment designed for deep study.
Ask
Highlight any passage and ask Pheynman to explain it in plain language.
Practice
Generate quizzes, flashcards, or mind maps from your highlights instantly.
Remember
Active recall builds understanding that lasts past the exam.
Every tool you need to understand what you read.
Not a collection of AI widgets. A single, coherent study environment.
Ask anything about what you're reading.
Highlight a confusing paragraph and ask Pheynman to explain it — in plain language, at your level, right in context. No tab switching. No Googling. Just understanding.
Think of it like a turbine in a dam. Electrons flow along the protein chain, releasing energy that pumps hydrogen ions — and that pressure drives ATP synthesis.
So electrons are like the water driving the turbine?
Turn your highlights into a revision deck.
Every passage you highlight becomes a flashcard candidate. Review them with spaced repetition or export to your favourite tool. Memory-building starts the moment you highlight.
What drives ATP synthesis in oxidative phosphorylation?
Tap to reveal answer →
Test yourself before the exam does.
Generate a quiz from any section of your document. Multiple choice, short answer, or concept checks — Pheyn builds questions from the material you've been reading, so you know exactly what you know.
Which process directly produces ATP in cellular respiration?
See how ideas connect.
Dense material becomes visual. Pheyn maps the concepts, arguments, and relationships in your document so you can see the whole picture — not just the paragraph you're stuck on.
Listen while you commute.
Pheyn turns any document into a conversational podcast summary. Two voices, back and forth, breaking down the key ideas. Study on the bus. Study in the gym. Study anywhere.
Chapter 3 summary · Cell Respiration
Study sessions that actually work.
What students say after studying with Pheyn.
More than a tool.
A thinking partner.
Pheynman is the AI tutor embedded in every reading session. Not a magic button — a patient, knowledgeable companion who helps you think through what you're reading.
Pheynman knows exactly which document you're reading and which passage you've highlighted. Every answer is grounded in your material.
There's a difference between restating a paragraph and helping you understand it. Pheynman explains concepts from first principles.
Ask the same question five different ways. Pheynman never tires. Understanding is the goal — not speed.
Tell Pheynman how much you already know. Undergraduate, postgraduate, professional — the explanation adjusts.
Your textbooks deserve better than a highlighter.
Join students who study smarter — not just longer. Pheyn is free to start.
No credit card required · Free forever plan available