MemDeck
A free, open-source training tool for mastering memorized deck systems. Built for magicians and memory enthusiasts.
Try it live →
Features
Flashcard Trainer
Test your recall with three training modes:
- Card → Position — See a card, guess its position in the stack
- Position → Card — See a position, pick the correct card
- Mixed — Randomly alternates between the two
Each mode presents five choices and tracks your score in real time. An optional timer adds time pressure (10s, 15s, or 30s).
Spot Check
Visual deck inspection training with three variants:
- Missing — Identify which card is absent from the deck
- Swapped — Identify which two cards were swapped
- Moved — Identify which card was moved to a different position
ACAAN Calculator
Practice Any Card At Any Number calculations: a target card and position are shown, you calculate the required cut depth and get instant feedback.
Distance Number Trainer
Drill the offsets between cards in your stack — the math behind Pit Hartling's Quartets. Two sub-modes:
- Compute — See two cards, recall the distance between them
- Apply — See a card and an offset, recall the resulting card
Switch between cyclic (forward only) and signed (shortest signed offset) conventions to match the style you actually use in performance.
Interactive Card Spread
Browse any stack with a draggable, touch-friendly spread. Supports mouse, touch gestures, and keyboard navigation.
Stats & Session Tracking
Track your training history with accuracy stats, best streaks, and per-mode breakdowns. An Exploration view maps which modes and variants you've tried, with one tap to try anything you've missed.
Guided Discovery
Once you've logged a few sessions, MemDeck surfaces a "New challenge" card on the home page — pointing you to a mode, variant, or timed challenge you haven't tried yet, picked from your own training history. One calm suggestion at a time, personalized to what you train most, and easy to dismiss.
Resources
Curated reading list of memorized deck books and PDFs to deepen your knowledge.
What's New
A curated changelog at /whats-new/ — recent updates (new stacks, features, and fixes), newest first, translated into all 7 languages. Each release shows its date and time in your local timezone.
Install as App
MemDeck is a Progressive Web App — install it on your phone or desktop for offline access. Silent auto-updates keep you on the latest version.
Share
Share MemDeck with fellow magicians via native share (mobile) or clipboard link (desktop).
Multi-language
Available in English, French, Spanish, German, Italian, Dutch, and Portuguese.
Dark / Light Mode
Toggle themes freely. Your preference is saved across sessions.
Supported Stacks
| Stack | Author |
|---|
| Mnemonica | Juan Tamariz |
| Aronson | Simon Aronson |
| Memorandum | Woody Aragon |
| Redford | Patrick Redford |
| Particle | Joshua Jay |
| Elephant | Pierre Boc & Yves Meret |
| Infinity | Tim Conover |
| Intuitiva Santi | Magic Santi |
Getting Started
git clone https://github.com/julienroussel/memdeck.org
cd memdeck.org
pnpm install
pnpm run dev
pnpm run lint # Check formatting and lint rules (Biome)
pnpm run typecheck # Type checking
pnpm run test # Unit tests (Vitest)
pnpm run test:e2e # E2E tests (Playwright)
pnpm run build # Production build
Tech Stack
React 19 · TypeScript · Mantine · Vite · Vitest · Playwright · Biome
Runs entirely client-side with no backend. State is persisted in localStorage.
Contributing
Want to help? Ideas for contributions:
- Add a new memorized deck system
- Improve translations or add a new language
- Report bugs or suggest features via issues
License
GPL-3.0
Acknowledgements
Card SVG images from tekeye.uk.
