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Flashcard App

Create and study flashcards locally with spaced repetition

Updated

What is the Flashcard App?

Master any subject with this powerful, privacy-first flashcard application. Built on proven spaced repetition algorithms, it helps you learn faster and remember longer—no account required, no data leaves your browser.

Why Spaced Repetition Works

Your brain forgets on a predictable curve. Reviewing at scientifically-calculated intervals—just before you forget—locks knowledge into long-term memory with minimum effort. This app automates that scheduling, so you study smarter, not harder.

Key Features

Feature Benefit
SRS Mode Cards appear when you're about to forget them
Cloze Deletions Hide parts of text for fill-in-blank practice
Three Study Modes SRS for retention, Random for cramming, Sequential for ordered review
Full Keyboard Control Space to flip, 1-4 to rate, never touch your mouse
Import/Export Bring cards from Anki, Quizlet, or spreadsheets
Deck Management Organize by subject, track per-deck statistics
100% Offline All data stored locally in your browser

Perfect For

  • Language learners building vocabulary with context
  • Medical students memorizing terminology and pathways
  • Developers drilling syntax, commands, and concepts
  • Exam candidates preparing for certifications
  • Lifelong learners collecting knowledge across any domain

Start with the included tutorial deck, then build your own in seconds.

How it works

Basic Cards

  1. Navigate to Create
  2. Enter content for the Front (question/prompt) and Back (answer)
  3. Click Add Card or press Ctrl+Enter

Your card is immediately saved to the currently selected deck and ready for study.

Cloze Deletions

For fill-in-the-blank style cards, use the {{c1::text}} syntax:

  • {{c1::answer}} — shows [...] on front, reveals "answer" on back
  • {{c1::hint::answer}} — shows [hint] on front, reveals "answer" on back

Example: The capital of {{c1::France::Paris}} is {{c1::Paris}}

Study Modes

SRS (Spaced Repetition)

The default and most effective mode for long-term retention. Cards are scheduled based on your performance:

Rating Effect Next Review
1 - Again Reset progress 1 day
2 - Hard Reduce ease Current interval × 1.2
3 - Good Standard progress Current interval × ease factor
4 - Easy Increase ease Current interval × ease factor × 1.3

Behind the scenes, the app uses an optimized SM-2 algorithm with ease factors starting at 2.5 and minimum bounds of 1.3.

Random Mode

Shuffles all cards in your deck for unlimited cramming. No scheduling—perfect before exams when you need to see everything.

Sequential Mode

Reviews cards in creation order. Useful for learning material that builds on itself (chapters, sequences, workflows).

Keyboard Shortcuts

Key Action
Space Flip card / Show answer
1 Rate "Again"
2 Rate "Hard"
3 Rate "Good"
4 Rate "Easy"
N Jump to Create new card
E Edit current card (during study)

Data Storage

All cards, decks, and study progress are stored in your browser's localStorage. This means:

  • No internet connection required
  • No account or signup
  • Data persists across sessions
  • Clear browser data → cards deleted (use Export to back up)

Import & Export

Export

Download all cards as CSV compatible with Anki, Quizlet, and spreadsheet apps:

Deck,Front,Back
Spanish,Hello,Hola
Spanish,Goodbye,Adiós

Import

Paste CSV data or drop a file. The parser auto-detects:

  • Simple two-column format: Front,Back
  • Three-column format: Deck,Front,Back
  • Quoted fields with escaped quotes

Understanding Card Statistics

Each card tracks:

  • Interval: Days until next review
  • Ease Factor: How easy the card is for you (higher = easier)
  • Repetitions: Successful review streak
  • Due Date: When card becomes available
  • Retention: Historical accuracy percentage

Deck overview shows:

  • New: Never studied cards
  • Learning: Reviewed 0-1 times
  • Mature: Successfully reviewed 2+ times
  • Due: Available for review now

Examples

Language Learning Deck

Create Spanish vocabulary flashcards with cloze deletions for fill-in-the-blank practice

Front: The word for "hello" in Spanish is {{c1::hola}}
Back: Hola is used as a casual greeting throughout the Spanish-speaking world
 
Card displays with [hola] hidden, reveals answer when flipped. Tracked for spaced repetition review.

Medical School Study

Build a deck for anatomy with sequential study mode for exam cramming

Deck: Anatomy - Muscles
Card 1: What muscle flexes the elbow? | Biceps brachii
Card 2: Innervation of the diaphragm? | Phrenic nerve (C3-C5)
 
Sequential review of 50+ cards, session stats showing 85% accuracy, 12 cards marked for review tomorrow

Import from CSV

Bulk import existing flashcard data from Quizlet or spreadsheet

"Front","Back"
"Capital of France","Paris"
"2+2","4"
 
2 cards imported to selected deck, ready for SRS study with default 2.5 ease factor

Frequently asked questions

Is my data really private?

Yes. This app runs entirely in your browser with no server communication. Your flashcards, study history, and progress are stored only in your device's localStorage. We cannot access, see, or share your data because it never leaves your computer.

How is this different from Anki?

Anki is powerful but complex; this app prioritizes speed and simplicity. Key differences: no account required, instant card creation without dialogs, cleaner modern interface, and full keyboard navigation. However, Anki offers more customization, plugins, and mobile sync. Use this for quick, focused study sessions; use Anki if you need advanced card types and cross-device synchronization.

Can I import my Anki decks?

Yes, with a workaround. Export your Anki deck as Notes in Plain Text format, then paste the content into the Import tab. The CSV parser handles most Anki exports. Media files (images/audio) are not supported—this app is text-only by design.

What happens if I clear my browser data?

Your flashcards will be permanently deleted. Always use the Export feature to create backups before clearing cookies or site data. Store exported CSV files in cloud storage or your downloads folder.

Why are my due cards not showing up?

Check your Study Mode selection. In SRS mode, only cards past their due date appear. If you see "No cards due for review," all scheduled cards are properly spaced. Switch to Random or Sequential mode to study cards regardless of schedule.

How do I make fill-in-the-blank cards?

Use cloze deletion syntax: wrap the hidden answer in double curly braces with a number prefix.

  • {{c1::Paris}} → shows [...], reveals "Paris"
  • {{c1::capital::Paris}} → shows [capital], reveals "Paris" You can create multiple deletions: {{c1::first}} and {{c2::second}}. The preview toggle shows exactly how your card will appear.

What do the ease factor and interval mean?

Ease factor measures how well you know a card (starts at 2.5, minimum 1.3). Interval is days until next review. Rating "Easy" increases both; "Again" resets them. These values optimize your study time by showing difficult cards more frequently and easy cards less often.

Can I study on my phone?

The web app is responsive and works on mobile browsers. However, there is no native app or offline service worker—an internet connection is required to load the page, though study itself happens locally. For dedicated mobile SRS, consider exporting to Anki Mobile.

How do I edit a card during study?

Press E while viewing a card's front to jump to the Browse tab with that card loaded for editing. Your study session position is preserved. Alternatively, finish the session, go to Browse, and search for the card.

Why does "Again" reset my progress to 1 day?

This is core to spaced repetition. Forgetting indicates the memory trace is weak; aggressive review (next day) strengthens it before decay completes. The algorithm prioritizes retention over speed—better to relearn now than forget permanently.

Can I share decks with friends?

Yes—export to CSV, send the file, and they can import it. For public sharing, post your CSV to forums, GitHub, or cloud storage. There is no built-in deck marketplace; this keeps the app simple and server-free.

What is the maximum number of cards?

Practical limit is ~10,000 cards depending on your browser's localStorage quota (typically 5-10 MB). Large decks may slow down import/export. For massive collections, consider splitting into multiple decks by topic.

Does this support images or audio?

No—this is a text-only tool by design. Images add complexity, storage requirements, and sync challenges that conflict with the "simple and private" goal. For media-rich cards, use Anki or other full-featured SRS applications.

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