Master Your
Vocabulary
Intelligent flashcards with spaced repetition for efficient JLPT preparation.
Select JLPT Level
Daily Goals
How to Use Flashcards Effectively
- Press Space or tap to flip the card
- Press 1 (Again) if you forgot completely
- Press 2 (Hard) if you remembered with difficulty
- Press 3 (Good) for normal recall
- Press 4 (Easy) for perfect instant recall
- Press Ctrl+Z to undo your last rating
The Science Behind Spaced Repetition
Our flashcard system uses the SM-2 algorithm, the same proven method behind apps like Anki. This algorithm optimizes your study schedule by showing cards at precisely calculated intervals, maximizing retention while minimizing study time.
Active Recall
When you see the front of a card and try to remember the answer, you're engaging in "active recall"— actively stimulating memory during learning. Studies show this is 150% more effective than passive review.
Optimal Intervals
The SM-2 algorithm calculates personalized review intervals based on your performance. Cards you know appear less frequently, while challenging cards appear more often—optimizing your study time.
Ease Factor
Each card has an "ease factor" that adjusts based on your ratings. Consistently easy cards have longer intervals, while difficult cards are reviewed more frequently until mastered.
JLPT-Focused
Our vocabulary sets are carefully curated from official JLPT word lists. Each card includes example sentences to help you understand usage in context—exactly how vocabulary appears on the exam.