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Turn your notes into free flashcards you can review on iPhone

Upload a PDF, slide deck, text file or photo of a page, and DeckOwl builds flashcards you can study in your browser on iPhone or iPad.

Create flashcards nowFree · No credit card required

Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free account · 3 sets a month · Creates flashcards in seconds

Why a free flashcard app for iOS works best with your own notes

Reviewing a lecture on the bus is easier when the cards are already on your phone. If you want a free flashcard app for iOS, DeckOwl's free plan runs in the browser, so you can study on an iPhone or iPad without a separate download.

Study cards in the browser on iPhone or iPad with the free plan
Upload PDFs, slides, notes or photos of pages
Spaced repetition keeps older cards due at the right time
Students get 40% off with a school email

Example iOS development flashcards

What does the @State property wrapper do in SwiftUI?It stores view-owned mutable state, and changing it makes SwiftUI redraw the views that read it.

What is ARC in Swift?Automatic Reference Counting, which frees a class instance once no strong references to it remain.

How do structs and classes differ when copied in Swift?Structs are value types and copy on assignment, while classes are reference types that share one instance.

What should run on the main thread in an iOS app?UI updates and handling user events; long tasks belong on background queues so the interface stays responsive.

What does 'if let' do with an optional?It unwraps the optional only when it contains a value, binding that value to a constant inside the block.

Generate the full set

Built from your own material

Upload PDFs, DOCX, PPTX, plain text or photos of pages. Images are read with text recognition, so handwritten-free printed notes work well.

Spaced repetition scheduling

Cards come back at the intervals where you are most likely to forget them, so review time goes to what you still need.

Free to start

The free plan includes 3 generations a month and studying in the browser. No credit card is needed to begin.

How it works

Upload your notes

Add a PDF, slides, a Word file, pasted text or a photo of a page from Safari on your iPhone or iPad.

Review the cards

DeckOwl drafts flashcards from the material. Edit any card that needs a clearer question or answer.

Study on a schedule

Open the deck each day and rate how well you knew each card. The next review date adjusts to your answers.

The free plan covers studying, but exporting to PDF, DOCX, Anki or CSV is part of Plus at $99.90/year or $9.99/month. Pro adds a stronger AI model, bulk upload, and QTI 2.1 and Moodle XML export for schools that need them.

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Frequently asked questions

How many flashcards should I make for an iOS development exam?

Start with one card per term, method or rule from each lecture, which usually lands between 20 and 40 cards per chapter. Add more cards for syntax you tend to mix up, such as value types versus reference types.

What makes a good flashcard for learning iOS or Swift?

Write the front as a specific question, such as what a property wrapper does, and keep the back to one or two sentences. Cards that ask you to explain why something happens tend to stick better than cards that only ask for a definition.

Is there a free plan, and does it include exports?

Yes, the free plan includes 3 generations a month and studying in the browser. Exports to PDF, DOCX, Anki and CSV are paid features, starting with Plus.

Can I make flashcards from a photo of my notes?

Yes. Photos of pages are read with text recognition, so you can upload a picture of printed notes or slides and get cards from the text.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.