Learn languages from real content with vocabulary capture, FSRS review, browser extension sync, and mobile-friendly practice.

• Science-Backed Learning: Master vocabulary from real videos, texts, and saved context using the FSRS algorithm and Dual Coding Theory.

• No Boring Textbooks: Learn directly from content you watch. Our browser extension analyzes subtitles in real time.

• Science-Backed Retention: Powered by the FSRS-6 algorithm, proven for accurate memory scheduling.

• Always in Sync: Create cards on your laptop and review them on your phone with seamless cloud sync across all devices.

• Browser Extension: Turn videos into language lessons. Works on YouTube, HDrezka.kim, with experimental Netflix and Coursera support.

• Cross-Device Review: Your progress syncs instantly across desktop, tablet, and mobile.

• Analytics: Track your mastery and visualize vocabulary growth with detailed heatmaps and streak tracking.

• Experimental AI Tutor: Practice conversations using the exact vocabulary you've learned, with adaptive guided prompts.

LexiSpark offers a complete ecosystem designed around Comprehensible Input and spaced repetition, making language learning efficient and engaging.