Finally, a flashcard system based on science
Unlike generic flashcard apps, Klana was designed from the ground up using findings from applied linguistics, cognitive psychology, and educational research. Every interaction is optimized for the way your brain actually acquires and retains new vocabulary.
Progressive difficulty scaling
Start with recognition exercises, then advance to recall tasks. Klana systematically increases retrieval effort as your knowledge strengthens, following the retrieval effort hypothesis proven to enhance long-term retention.
Finally, a flashcard system based on science
Traditional flashcard apps ignore decades of research on how memory actually works.
Klana is different. Every feature is grounded in cognitive science and second language acquisition research.
Adaptive Sequencing That Learns From You
Our algorithm adjusts to your performance, ensuring difficult words appear more frequently while known words fade into longer review cycles— exactly as memory research recommends.
Progressive Difficulty Scaling
Start with recognition exercises, then advance to recall tasks. Klana systematically increases retrieval effort as your knowledge strengthens, following the retrieval effort hypothesis proven to enhance long-term retention.
Multi-Modal Learning
Klana automatically generates example sentences, mnenmonics, audio, and much more. Research shows that rich, multi-sensory associations create stronger memory pathways than text alone.
Expanded Rehearsal Scheduling
Forget rigid daily reviews. Klana implements spaced repetition with gradually expanding intervals—the gold standard for long-term retention identified in over 50 years of memory research.
Features that make the difference
✓ Generative Learning - See words in multiple contexts to build deep understanding
✓ Multiple Exercise Types - From recognition to production, train every aspect of knowledge
✓ Flexible Study Sessions - Customize the number of new flashcards based on your learning goals
✓ Multi-Language Support - We have dozens of languages available
✓ Progress Analytics - Track your learning with metrics that matter