Textbook summaries, chapter by chapter

For students and engineers with a dense book and not enough time.

A textbook chapter takes an hour to read and most of it is gone a week later. Refine turns each chapter into something you can get through on the way to class, and then brings it back before you forget it.

How it works

• Scan the cover or the barcode. Refine finds the book and its table of contents. No PDF needed.
• Every chapter gets a two-minute summary: the chapter's main claim, its key takeaways and why each holds, and what it leaves open.
• A longer read when you need depth, with equations, code and diagrams kept, not flattened into prose.
• Listen while you read. A natural voice reads the chapter and each word lights up as it's read.
• Remember it. A few review questions a day, timed for just before you'd forget, so the chapter is still there at the exam.

Built for technical and STEM textbooks

Most summary apps cover self-help bestsellers. Refine is built for the books you're assigned or need for work: computer science, engineering, biology, finance, mathematics. It keeps the formulas, the code listings and the diagrams that those chapters depend on.

What it is not

A summary tells you what a chapter argues and helps you keep it. It doesn't replace working the problems. The full text of every chapter is one tap away when you need it.

Also works with

PDFs and documents you own, research papers, web pages, and pages you photograph. Every chapter also gets a concept map.