Synthra · Cognitive reader for STEM
Synthra turns dense textbooks into interactive cognitive maps. Tell it why you're reading, and it fades what doesn't matter, pins every figure and equation, keeps your questions where they happened — and quizzes you until the map is truly yours.
How it works
Synthra reads the book the way a good TA would: chapters, sections, figures, equations, tables — and how they depend on each other. The result is a navigable map of the book's ideas, not just a table of contents.
"I need Fourier transforms for my signals exam." Sections 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. Generated quizzes then tell you — per concept — what you've actually mastered and what still needs work.
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 from the map itself — multiple-choice and free-response, graded with rubrics. Every concept carries a mastery score, so "I think I get it" becomes a number you can trust (or 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 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
Whether you're cramming for finals, learning a new field on your own, or working through the canon of a discipline — stop re-reading and start mapping.