YouTube Learning Toolkit

Learn Languages with YouTube

Save vocabulary from videos, review with spaced repetition, and master new words effortlessly.

CC Plus

YouTube Enhanced

Transform YouTube into an immersive learning environment with interactive bilingual captions, clean interface, and theater mode.

Interactive Captions

Click any word in subtitles to save it instantly

Wide Screen

Maximize immersion with theater mode

Clean Interface

Remove ads and distractions for focused viewing

Side Comments

Move comments to the right for better layout

Comment Search

Search and filter comments easily

Smart Vocabulary

Select any word on any webpage to translate instantly, save to your vocabulary, and master with spaced repetition.

Word Selection

Select any text to translate and save words

Context Capture

Automatically saves the surrounding sentence for better memorization

Smart Review

SM-2 algorithm schedules reviews at optimal intervals

Cloud Sync

Your vocabulary syncs across extension and website

Activity Tracking

Visualize your learning habits with GitHub-style heatmaps

Manage vocabulary, review with flashcards, and track your progress — all in one place.

Science-backed SM-2 spaced repetition system helps you remember words long-term

Track your streak, mastery distribution, and daily progress with detailed charts