Studying should make it click — and make it stick.
Vidi is an interactive study companion. Instead of passively reading, you learn each subject by doing — with worked examples, auto-graded practice, timed exams, and spaced review, all wrapped in a plan built around your exam.
Why we built it
Most study tools stop at showing you the material. The hard part — turning a page you’ve read into something you can actually do under exam pressure — is left to you. That’s where people get stuck, and where cramming quietly fails.
Vidi is built around how memory really works: you remember what you practice retrieving, spaced out over time, mixed together, with honest feedback when you’re wrong. We turned that into a single place where every lesson is something you do, not just something you see.
How Vidi teaches
You solve problems from the first minute. Working things out — not re-reading them — is what makes them stick.
Lessons and problems resurface right before you’d forget them, so each pass lands exactly when it counts.
Practice mixes chapters, so you learn to pick the right method — not just repeat the last one you saw.
Every answer explains the why, and the ones you miss become a review set built just for you.
See a problem solved in full, then solve the next ones as the scaffolding is slowly removed.
Tell Vidi your exam date and she builds a day-by-day plan that tightens as the day approaches.
Who it’s for
Vidi is for anyone with a real exam on the calendar and limited time to get ready — university students, self-learners returning to a subject, and anyone who wants to understand the material deeply rather than memorize it the night before. You bring the goal and the deadline; Vidi brings the lessons, the practice, and the schedule.
Subjects
We’re starting focused and going deep: a pilot across linear algebra, probability, and classical mechanics, with more on the way. Every lesson is written and checked by hand before it ships, so breadth never comes at the cost of getting the details right.
Browse the full catalogSee it for yourself
Try a real lesson now — no sign-up, nothing saved. When you’re ready, create a free account to keep your progress and sync it across your devices.