A next step for everything you learn
Bring your books, notes and course materials. Build understanding, test yourself and keep what you learn.
Example material · Section 1
Learning methods · Active recall
Active recall means retrieving knowledge from memory before checking the material. Compared with simply rereading, it helps reveal what you have not yet mastered.
What is the first step in active recall?
This example does not save progress. FSRS calculates real intervals from your review history.
Start with the materials you already have
Image, audio and semantic search availability depends on deployment configuration.
Organize your materials once. Read, practice and review in one connected learning space.
Import files, links or notes. Combine several sources in one learning collection.
Multiple sources
Ask your AI tutor as you read. Keep highlights and notes, and follow citations back to the source.
Context and source references
Generate cards and quizzes, then try to answer. Keep mistakes for targeted practice.
Active recall and practice
FSRS adjusts your queue after each recall, so you keep using what you learned today.
Spaced review and reminders
Start with one reading session. Build a learning system that belongs to you.
Manage highlights, notes, citations and study cards together. Search a concept again and find your earlier thinking too.
Example study note
Retrieve, then check
Recognizing an answer is different from answering independently. After your next section, close the source and explain it in your own words.
Create an outline from a topic or your materials, edit teaching content, complete lesson exercises and share a learning path.
Example course structure
Your review queue keeps track of what is due. Answer first, then check, and let each practice session inform the next.
Intervals change with recall, rather than following a fixed 21-day knowledge schedule.
Mistakes, chapter quizzes and cards give difficult material another chance.
Follow activity and progress while keeping exercise completion distinct from mastery.
Bring real learning into shared decks, peer leagues and friendly quiz challenges. Let your study partners help you stay engaged.
Explore social learningVerified references locate the source. Unverified inferences are identified separately.
Edit cards and course content, organize notes and export study materials.
Partial generation, parsing failures and unavailable capabilities have explicit states.
Pricing Plans
Try the core study tools free. Upgrade for more imports, more AI generation, and a bigger personal library.
Additional courseware credits can be bought separately. New users receive 50 points upon registration.
See All PlansCreate an account and open the interactive library. Import a PDF, link or note, read and ask your tutor questions, then generate cards or quizzes and complete due practice on the review page.
PDF, EPUB, PPT/PPTX, web pages, text and notes are supported, along with images, audio and YouTube captions. OCR, audio transcription and semantic search depend on configured providers. The import dialog shows available capabilities.
Verified references link back to original material. Unverified AI inferences are marked separately. You can edit cards and course content; check important conclusions against the source.
No. FSRS schedules cards dynamically from recall results. The 21-study-day habit challenge counts actual study days to support consistency; it does not set card intervals.
Bring a textbook chapter, an article or today’s class notes. Take learning from understanding to mastery.