Prism LinesLearn a language from every line you've watched

Import TV shows or any subtitled video, split lessons by subtitles, mark words you know, build flashcards, and replay the original sentences when you review.

Get Started

Download Desktop

🎬 Subtitle-Based Lessons

Works with TV series and any subtitled video. Each subtitle line becomes a learning unit synced to video and audio—the material comes from content you already want to watch.

🔤 Sentence to Words

Split subtitle lines into words and ask “Do you know this?” Known words pass through; unknown words join your personal vocabulary instead of drilling random word lists.

🃏 Smart Flashcards

Unknown words become spaced-repetition cards. The app schedules reviews at 1, 3, 7, and 30 days so vocabulary actually sticks.

🔊 Sentence Playback on Review

When reviewing a word, play the exact sentence and clip from when you first learned it. Words stay tied to context and emotion—not isolated entries.

🧠 Active Recall

Recall first, reveal second—not passive subtitle reading. Every “know / don’t know” decision is active retrieval, far more effective than binge-watching alone.

🛡️ Local-First & Privacy

Desktop architecture processes video and subtitles on your machine. Progress and word lists stay local—no need to upload your viewing habits to the cloud.