LexiSpark
Science-Backed Language Learning
13
Languages
FSRS-6
Algorithm
<30ms
Latency
Free+
Pricing
LexiSpark is a language learning platform built on the principle of comprehensible input. Save words from real content — YouTube videos, articles, podcasts, websites — and review them with the FSRS-6 spaced repetition algorithm. Every word comes with its original context, translation, and audio, so you learn through meaning, not memorization. Available as a Chrome extension and web app, LexiSpark supports 13 learning languages with vocabulary tracking, heatmaps, streak tracking, and an experimental AI conversation practice feature.
Started
2025
Category
EdTech
The Problem
Traditional language learning relies on decontextualized flashcards and textbook exercises. Learners spend hours memorizing words they encounter in isolation, only to forget them within days. Existing tools like Anki require manual card creation and lack the context that makes vocabulary stick.
The Solution
LexiSpark meets learners where they already are — watching YouTube, reading articles, browsing the web. The Chrome extension lets users save any word in its original sentence with one click, automatically capturing translation, audio, and screenshot context. The FSRS-6 algorithm then schedules reviews at the optimal moment, achieving significantly higher retention than traditional SM-2 scheduling. Dual coding (text + image context) reinforces memory through multiple pathways.
Key Results
13 learning languages supported
FSRS-6 algorithm with measurably higher retention than SM-2
Chrome extension for saving words from any web content
Free during early access with Pro and Lifetime tiers