FlashStacksThe AI flashcard generator that lives on your phone
An AI flashcard generator reads your study material and writes question-answer cards automatically. FlashStacks goes further: it builds the deck from any PDF and puts it on your Home Screen, so the cards it makes actually get studied.
What can it generate cards from?
Anything you can save as a PDF — which in practice is everything:
- Lecture slides exported from PowerPoint, Keynote, or your uni's portal
- Textbook chapters and scanned readings
- Your own notes from Notion, GoodNotes, Word, or Google Docs (export as PDF)
- Study guides and past-paper solutions
Full walkthrough on the PDF to flashcards page.
Why use FlashStacks instead of ChatGPT for flashcards?
You can paste notes into ChatGPT and ask for flashcards — plenty of students do. The problem is everything after: you get a wall of text you have to manually copy into a flashcard app, card by card. FlashStacks closes that loop:
- One step, not five — upload the PDF, get an importable deck. No copy-pasting
- Vision built in — diagram-heavy slides are read with AI vision and flagged for image occlusion cards
- Exam-aware modes — High-Yield mode filters for examinable content instead of summarising everything equally
- Widget-ready output — an option keeps every card short enough to read on a Home Screen widget
- Straight into spaced repetition — generated cards enter the same SM-2 scheduler as handwritten ones
Quality controls, not blind trust
Every generated card is shown to you before it enters your deck. Keep the good ones, drop the rest, edit anything. The AI does the tedious 90% — you keep editorial control over the 10% that matters.
From generation to memorisation
Generating cards is the easy half. FlashStacks schedules every card with spaced repetition and rotates them through your Home Screen and Lock Screen all day. The deck the AI built at 9am is being reviewed in the coffee queue by 11.
AI flashcard generator — FAQ
Is the AI flashcard generator free?
It's part of FlashStacks Premium, with a 3-day free trial on the annual plan. The core flashcard app — unlimited cards, spaced repetition, widgets — is free.
What AI does FlashStacks use?
FlashStacks uses Claude, Anthropic's AI model, with vision support for reading diagram-heavy pages.
Can it make cloze / fill-in-the-blank cards?
Generated cards are question-answer format, and diagram pages can become tap-to-reveal image occlusion cards — the visual equivalent of a cloze deletion.
How long does generation take?
Typically under a minute for a lecture's worth of slides. Longer documents are processed in batches with live progress, and you get a notification when the deck is ready.
Stop writing cards. Start remembering.
Upload a PDF and watch your deck write itself.