Built so you walk in ready.

The worst moment in a course is turning over the exam and finding a question about something you never really learned. Not because you didn't study — because nothing told you that was the gap. You spent the week on the chapters you already had.

A study app can't tell you either. It doesn't know which edition of the book you have, which chapters your exam covers, or when it is. It hands you the whole textbook.

Trequence starts from your actual course instead. Your school, your course code and your textbook — found from its ISBN through publisher and library catalogs, then confirmed with you. What comes out is a chapter list that matches the book on your desk, and a practice exam on the chapters you told us your exam covers.

Then you take the exam before the exam.

You get a practice exam built from those chapters, and a number: the grade of your latest practice exam. Take another, and it moves.

• The practice exam — built from the chapters your exam covers, not the whole book and not a generic question bank. Take it early, while there's still time to do something about what it finds.
• Your readiness number — the grade of your latest practice exam. One number that answers "am I ready" with something better than a feeling.
• Review — the Recap and Recall cards for each chapter, and how you close the gaps the exam found. They come after the test, not before it, because until you've been asked you don't know which sections to spend the evening on.

Practice testing is among the most validated methods in learning science. Being asked to retrieve something is what makes it stick; re-reading mostly doesn't. Most study tools treat the test as the last step, after the notes and the cards. We build it first, because being asked is the fastest way to find out what you can't answer yet.

We'd also rather tell you we couldn't confirm your textbook than hand you a chapter list we made up. Every fact about your course is something we retrieved and checked, something you told us, or plainly marked unresolved. The practice questions and Review are written from those facts.

We built this for the week before a midterm — for the version of you with nine days, a syllabus, and no idea which of those chapters is going to hurt. If that's familiar, give it a try.