Memory Science

Adaptive Spaced Repetition for English Vocabulary

Bring learning words back at useful intervals while your known words, reviews, tests and game results help LexUp decide what new vocabulary to recommend next.

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Scientific Memory Curves

Study words at mathematically optimized intervals to flatten the forgetting curve.

Personalized Review Queue

The app customizes your daily review list based on your individual performance.

Active Retrieval Quizzes

Verify memory strength with interactive context-rich fill-in-the-blank practice tests.

Why Spacing Helps

Memory becomes stronger when retrieval is repeated across time instead of compressed into one session. LexUp uses spaced reviews to bring learning words back without asking you to repeat every known word every day.

How LexUp's SRS Engine Works

LexUp tracks your interaction with learning words and uses those signals to organize future practice. Spacing handles when a word returns; adaptive recommendations help decide which useful new words to introduce.

  • Optimized Efficiency: Spend zero time reviewing words you already know, and focus completely on terms in your forgetting window.
  • Interactive Daily Reviews: Wake up to a personalized review queue designed to fit into a quick 5-minute daily routine.
  • Long-Term Consolidation: Move vocabulary from short-term working memory to stable, long-term semantic memory.

Frequently Asked Questions

What is spaced repetition (SRS) in language learning?

Spaced Repetition System (SRS) is a cognitive science method where vocabulary words are reviewed at increasing intervals (just before you are about to forget them) to optimize memory consolidation.

How does LexUp apply spaced repetition?

When studying flashcards in LexUp, you choose your recall strength: 'Review tomorrow', 'Review in 3 days', or 'Will Never Forget'. The algorithm dynamically calculates the next review interval.