In partnership with Purdue University

The Science of Fluency

Master a new language with proven, research-backed methods from Purdue University and Georgia Tech. We have stripped away the guesswork to build a platform rooted in cognitive science.

FSRS Memory Model

Our Free Spaced Repetition Scheduler is a modern replacement for the aging Anki SM-2 algorithm. It uses a three-component model to predict the stability, retrievability, and difficulty of any given memory.

"Memory decay is non-linear. Optimal review scheduling must account for the increasing stability of a memory trace each time it is successfully retrieved."

- Dr. Wenzhe Ye, Neural-SMC Theory
Data visualization for memory modeling
Dictionary reference screen

The Krashen Hypothesis

Comprehensible Input Without the Friction

Acquisition requires meaningful interaction. Our AI generates content dynamically tailored to your exact vocabulary level, keeping you in the Goldilocks Zone of language learning.

  • Natural ContextRelevant conversations tied to your capabilities.
  • Adaptive NarrativeThe story evolves as your known vocabulary expands, naturally introducing more complex grammar and phrasing.

Beyond Right or Wrong

Fluency requires more than memorizing rules. We combine advanced memory tracking, adaptive immersion, and active speech training to build true, natural proficiency.

Comprehensible Conversations

Engage in real-time dialogue without the frustration of hitting a wall. Our AI dynamically scales vocabulary and grammar to match your exact level.

Migaku (2026)

Global SRS Flashcards

Progress is tracked globally across the platform, scheduling reviews at the exact cognitive moment needed for consolidation.

Jeong, Park, and Yu (2026)

Precision Shadowing

Listen to native-level audio and immediately mirror the speech, building cadence, rhythm, and tonal nuance.

Whitworth and Rose (2025)

Ready to learn scientifically?