Synthra · AI cognitive reader for dense books
Synthra's AI reads your textbook cover to cover — every chapter, figure, and equation — and turns it into an interactive cognitive map. Tell it why you're reading and it clears the path: what matters stays sharp, your questions stay pinned where they happened, and AI-generated quizzes prove what you've actually mastered.
How it works
Synthra's AI reads the book the way a good TA would: chapters, sections, figures, equations, tables — and how they depend on each other. Minutes later you have a navigable map of the book's ideas, not just a table of contents.
"I have an essay due on the causes of the French Revolution." Chapters that don't serve the goal fade into the background; the path that does stays sharp. Change the goal, and the map re-prioritizes — no re-reading required.
Read, highlight, and question in a workspace that keeps everything anchored to the page it came from. AI-generated quizzes — multiple choice and free response, graded against a rubric — tell you, concept by concept, what's mastered and what still needs work.
Interactive — try it here
One history textbook, two different assignments. Click a goal — the chapters you actually need light up, and the rest step back. That's exactly what Synthra does to a real book.
What's inside
Goal-based pruning keeps the whole book present but ranks it honestly: what serves your goal stays vivid, the rest steps back to 40%. Nothing is hidden — you can always pull a faded section forward and lock it in.
The Cognitive Ledger pins every question to the exact page and passage that raised it. Come back a week later and the context is still there — your confusion, its origin, and the explanation that resolved it.
Quizzes are generated by AI from the map itself — multiple-choice and free-response, with your written answers graded against a rubric. Every concept carries a mastery score, so "I think I get it" becomes a number you can act on.
Figures, equations, and tables are captured at 4× resolution and pinned beside your notes. Jump anywhere in the book and back — a navigation trail means you never lose your place chasing a reference.
Ecosystem
When your calculus text and your machine-learning text define the same concept, Synthra's AI finds the match and bridges them. Master an idea once and every book that builds on it knows — already-covered sections dim, with the source always shown.
Anywhere Synthra runs in the browser and as an iPad app with Apple Pencil handwriting — offline-first, with your library, notes, and mastery synced across devices.
Early access
Engineering, medicine, law, history, economics — if the book is dense, Synthra can map it. Stop re-reading and start mapping.