Turn any PDF into flashcards — automatically

How it works

1. Upload your PDF

Tap Generate from PDF inside any stack and pick a file from Files, iCloud Drive, or any app. FlashStacks handles lecture slides, scanned textbook chapters, revision guides — anything in PDF format, up to dozens of pages.

2. Choose your focus

Pick High-Yield for a compact deck of just the top examinable facts, or Comprehensive for full coverage of the material. Set a target card count from 10 to 50. There's even a widget-friendly mode that keeps questions short enough to display on your Home Screen.

3. Review and import

AI reads every page — including diagrams, which it flags for optional image occlusion cards — and writes clear question-answer pairs. You see every generated card before it enters your deck, so nothing gets imported that you don't want.

Why AI-generated flashcards actually help you learn

The common objection to auto-generated cards is that writing cards yourself is part of the learning. That's true for some learners — but the research on active recall shows the biggest gains come from testing yourself repeatedly, not from the one-time act of writing the card. Most students who make cards by hand run out of time and only cover a fraction of the material.

AI generation flips the equation: full coverage of your material in seconds, so you spend your study time on the part that actually builds memory — recall practice with spaced repetition.

Built for real study material

• Lecture slides — dense bullet-point slides become clean Q&A pairs
• Textbook chapters — long-form text is distilled into examinable facts
• Diagrams and figures — flagged automatically so you can turn them into tap-to-reveal image occlusion cards
• Any subject — medicine, law, languages, biology, history — if it's in a PDF, it becomes a deck

Then study it from your Home Screen

Here's the part no other flashcard generator has: every card FlashStacks creates is widget-ready. Your generated deck rotates on your Home Screen and Lock Screen throughout the day, so review happens in the gaps of your day — no app-opening required.