TubeVocab

TubeVocab is an AI-powered English learning platform built for ESL learners who want to acquire vocabulary in context — not from textbook word lists. Watch any YouTube video with interactive subtitles, click any unknown word to instantly get its translation, pronunciation, and AI-generated example sentences, then save it to a flashcard deck. Spaced repetition (Anki-style) schedules your reviews so words actually stick. UI in 10 languages: English, Chinese, Spanish, Japanese, Korean, French, German, Portuguese, Russian, Arabic. Free tier for everyone.