Drop in a textbook chapter, a research paper, lecture notes or a Wikipedia article. A neural network on your device reads every idea, groups them into topics by meaning, and turns hours of reading into a map you can explore, search and study from.
·
6,364 words in the demo
13 topics, found by AI
0 servers used
How it works
From a wall of text to a sky of ideas
Every step below runs on your device. Numbers are live for this galaxy.
🔒 Your text never leaves this tab. The model is downloaded once from Hugging Face, cached by your browser, and then works offline.
For students
Turn a 40-page reading into a study plan
Built for the moment you open a long chapter, paper or pile of lecture notes and don't know where to start.
🌙The night before the exam
Map the chapter, read the Key ideas for a one-minute summary, then Quiz this topic on your weakest topics until they burn gold.
🔬Reading a research paper
See every topic at a glance, then Ask the sky “what method did they use?” and jump straight to the answer. No Ctrl+F guessing.
✍️Writing an essay
Connects to shows how two topics link, which is often your argument. Every idea shows its section, so it's easy to cite.
🗂️Lecture notes all term
Paste each week's notes, test yourself with Explain it back, and export a checklist Study guide to revise from.
Features · press Try it to see each one live
✧ Key ideas
The single most representative idea of every topic: the whole document in a minute.
Press Key ideas in the dock⌕ Ask the sky
Search by meaning. Ask in your own words and the best-matching ideas light up.
Type in the top bar, press Enter✎ Explain it back
The Feynman technique, checked by AI: write what you remember and see which core ideas you covered or missed.
Open a topic → Explain it back◎ Quiz
Fill-in-the-blank questions made from the text. Mastered stars turn gold and topics fill up in the list.
Quiz, or open a topic → Quiz this topic⟷ Connections
Which topics link to each other, and the ideas that bridge them. Good for essays and for seeing the big picture.
Open a topic → Connects to☰ Study guide
A Markdown file with each topic's key idea, key terms and a checklist of every idea, your progress ticked.
Press Study guide in the dock💾 Saved progress
Mastered ideas are remembered on this device, so you can close the tab and pick up tomorrow where you left off.
Automatic, nothing to do✦ Any document
A Wikipedia link, a PDF, a .txt/.md file or pasted notes. Up to about 600 ideas, all processed on your device.
Press Map a document
About a minute. The app runs every feature live while you watch.
✎ Explain it back
Explain this topic in your own words
The Feynman technique: if you can explain it simply, you understand it. Write from memory, without looking. The AI checks which of the topic's core ideas you covered, by meaning, not by keywords.
0 words
New galaxy
Map a document
Built for long reads: textbook chapters, papers, lecture notes. Everything is processed in your browser, and nothing is uploaded.
Try a long one
0 ideas
Waking the model
Running a neural network on your device. No servers, no sign-up.