Turn any PDF into number flashcards with AI
Printed number sheets cover someone else's list of facts. DeckOwl builds cards from the exact pages your class uses, then schedules reviews so the hard ones come back first.
Why build your own number flashcards
If you need number flashcards based on your own PDF, a generic printable set will skip the facts your teacher actually tests. Factors, fractions, place value, and prime numbers each show up in different ways depending on the unit, so the cards should follow your lecture order.
- Cards come from your own PDF, slides, or notes rather than a fixed printable list.
- Spaced repetition brings back missed number facts more often than the ones you have mastered.
- Photos of printed pages are read with text recognition, so you do not need a digital copy.
- PDF, Anki, and CSV export are available on Plus for printing or other study apps.
Built from your PDF
Upload a PDF, slide deck, DOCX, notes file, or a photo of a textbook page and get cards that match your course.
Spaced repetition
Cards you miss come back sooner, and cards you know are spaced further apart, so review time goes to what you need.
Export when you need print
Plus exports your set as a PDF, plus Anki and CSV files, so you can print or study in another app.
How it works
Upload your material
Add a PDF, slides, notes, or images of pages. Text recognition reads photos as well.
Review the generated cards
Check the fronts and backs, trim or edit anything that doesn't match your lecture, and keep the set.
Study on a schedule
Use spaced repetition in the browser on the free plan, or export a PDF to print on Plus.
Upload the handout or chapter, and DeckOwl writes question-and-answer cards from that text. You can then study them in the browser with spaced repetition, so the number facts you keep missing come back before the ones you already know.
Start small: one unit, 15 to 25 cards, and a short daily session. Once that routine feels steady, add the next chapter and let the older cards keep coming back on schedule.
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Frequently asked questions
How many number flashcards should I make for one study session?
Start with 15 to 25 cards on a single skill, such as multiplication facts or place value, so each review stays manageable. Add more once you are getting most answers right on the first try.
What is the best way to study number facts with flashcards?
Say the answer aloud before you flip the card, and set missed cards aside to review again the same day. Mix in older cards as well so earlier skills do not fade.
Can I export my number flashcards to a PDF?
PDF export is included with Plus, which costs $39 per year or $7.99 per month. The free plan gives you 3 generations per month and browser study, but no exports.
Do I need a credit card to start?
No, you can start on the free plan without a credit card. Students get 40% off Plus with a school email.
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