Duck
Duck
FSRS Algorithm · AI Evaluation

Learn for real. Learn to

Answer with text or audio, get objective AI feedback, and review each card at the right moment with FSRS. Less useless review, more learning that sticks.

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Question

What is the role of the hippocampus in forming long-term memories?

Your answer

The hippocampus consolidates memories, transferring information from short-term to long-term memory during sleep...

Audio answer · 0:08
AI Evaluation0

Great answer! You covered consolidation and its relationship with sleep. For a perfect score, mention synaptic plasticity and the hippocampus's role in spatial context.

Next review in 4 days

Professor Mode available — deepen your learning

Why Duck works

AI study that goes beyond traditional flashcards

AI that understands context

Doesn't compare keywords — evaluates if you really understood. Score from 0 to 100 with detailed feedback on what you got right and what you missed.

Review at the right time

The FSRS algorithm calculates exactly when you're about to forget. Zero waste reviewing what you already master, zero gaps in what you forgot.

Professor Mode

After each answer, AI can ask up to 3 follow-up questions — like a Socratic tutor ensuring you truly understood.

How it works

Simple to start. Powerful to continue.

1

Create your cards

Manually, with AI from a topic, importing from a YouTube video or PDF. In seconds.

2

Answer with text or audio

Type your answer or record audio. AI transcribes and evaluates the same way — no excuses.

3

Review at the right time

Duck schedules each card individually by FSRS. You review only what you're about to forget.

Card creation

Transform any content into flashcards with AI

Don't waste time creating cards from scratch. Let AI do the heavy lifting.

YouTube → Cards

Paste any video link. AI extracts key concepts and generates cards automatically.

PDF → Cards

Upload your material. Works with digital, scanned, and mixed PDFs.

AI Generation

Describe a topic and AI creates a complete deck of cards with questions and answers.

Import CSV/JSON

Have cards in another format? Import all at once with the standard template.

Free to start

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500 AI credits/month on free plan · Unlimited cards · Cancel anytime