Master your memorized deck
A memorized deck is a full deck of cards in a specific order that you commit to memory — unlocking powerful card magic and mental feats.
MemDeck helps you master your memorized deck with drills, calculators, and visual training. Pick a stack below to get started — it's free and runs entirely in your browser.
Not sure? Mnemonica and Aronson are popular starting points.
Training modes
Flashcard
Drill card-to-number and number-to-card recall with timed sessions.
Spot Check
Train to spot anomalies — missing, swapped, or moved cards in your deck.
ACAAN
Calculate cut depths for Any Card At Any Number effects.
Distance
Drill the offset between two cards — the math behind Pit Hartling's Quartets.
Toolbox
Stack lookup, faro shuffles, card spelling, and stay-stack sequences.
Stats
Track your accuracy, streaks, and session history over time.
New here? Read the Guide
Learn about all the training modes and how to get the most out of MemDeck.
Why a dedicated app instead of AI?
ChatGPT and Claude can hallucinate card positions — and training with wrong answers is worse than not training at all.
Verified data
Stack data is hardcoded and verified. AI models can get card positions wrong.
Instant drills
Tap-based UI instead of typing prompts and waiting for responses.
Works offline
Train backstage, on the subway, or on a plane — no internet needed.
Visual memory
Seeing actual card faces engages visual memory differently than reading text.
Progress tracking
Accuracy charts, session history, and streaks — AI chats have no memory.
Free forever
No $20/mo subscription required.