Everything you need to master more
A complete study system — from turning your material into practice, to making sure it sticks, to knowing exactly where you stand.
Question generation
Turn any source into exam-grade questions
Upload a lecture, PDF, slide deck, or video and get multiple-choice, free-response, case, and flashcard questions in seconds — each grounded in your material with a citation back to the exact page or timestamp.
- Plausible distractors that test real understanding
- A judge model filters weak, duplicate, or trivial items
- Every question cites its source
- Thumbs-down anything to remove and improve it
Which ion is primarily responsible for the plateau phase of a cardiac action potential?
Spaced repetition
Review at the perfect moment, every time
ClassFactor schedules each card with FSRS — the modern successor to SM-2 — predicting your personal forgetting curve so reviews land right before you'd forget. Maximum retention, minimum time.
- FSRS-6 scheduling out of the box
- A daily queue that adapts to your time
- Prioritizes your weakest recall first
- No manual intervals, ever
Your review schedule
Cards resurface right before you'd forget them
AI tutor
An explanation for everything you miss
Get instant, source-grounded explanations on any card — or open a chat to dig deeper. On Medical, talk through a case out loud with the voice tutor and get answers that cite your own notes.
- Explanations generated on demand, grounded in your source
- Chat threads scoped to a card, document, or lecture
- Voice tutor for hands-free study (Medical)
- Always available while you review
Image occlusion
Mask-and-reveal for anatomy & diagrams
Upload a labeled diagram and ClassFactor creates occlusion cards that hide each label for you to recall — the fastest way to learn anatomy, pathways, and any visual you need cold.
- Automatic label detection on diagrams
- One card per masked region
- Perfect for anatomy, biochem, and pathways
- Scheduled with FSRS like every other card
Label the structure
Tap a masked region to reveal the label
Mastery analytics
Always know exactly where you stand
A mastery score per topic, a retention forecast, and a heatmap of your consistency — so you can see what's strong, what's slipping, and precisely what to review next.
- Per-topic mastery tracking
- Retention curve vs. the typical learner
- Weak-topic detection and next-best actions
- Streaks, study time, and progress over time
Mastery by topic
Exam templates
Board-style questions, built in
Generate in the exact style of your exam. Medical unlocks USMLE Step 1 & 2, MCAT, and NCLEX templates that produce real clinical vignettes with the right option count and difficulty.
- USMLE Step 1 & 2, MCAT, NCLEX templates
- Clinical vignettes with 5-option stems
- Set an exam date to drive your schedule
- Quality-over-quantity: fewer, harder items
A 58-year-old man presents with crushing chest pain radiating to the left arm. ECG shows ST elevation in leads II, III, and aVF. Which vessel is most likely occluded?
And more
Anki export, source citations, offline review & more
Every feature works together in one place — no more juggling five different study apps.
Start today. Multiply tomorrow.
Join thousands of students building lasting mastery — one correct recall at a time.