Lacuna
The Vocabulary App
What Makes Lacuna Different
Adaptive Question Selection
The game dynamically adapts to your skill level to keep games fresh and challenging.
Play Thousands of Public Domain Books
Lacuna offers thousands of public domain books with unique questions, letting you practice vocabulary in authentic sentences from your favorite books.
Challenge Yourself
The questions rely on context understanding, which means memorization won't cut it. Higher ranks demand instant vocabulary recall in challenging context.
Ready to play?