Sayover

Learn English from YouTube: listen, save sentences with one key and review them with spaced repetition. No account needed.

Turn YouTube videos into English listening practice. Sayover lets you save the sentences you want to keep with a single key, then review them with spaced repetition until they stick. Built for English learners whose native language is Korean or Japanese. ■ How you learn 1. Listen — Sayover shows one line of English captions over the video. The translation stays hidden: guess the meaning first. 2. Check — Stuck? Press T to peek at the translation in your language. ←/→ jumps to the previous/next line, R repeats a line. 3. Save — Press S on a sentence you want to keep. Sayover saves it with the lines around it, the translation and the moment in the video. 4. Review — Saved sentences come back on a spaced-repetition schedule (FSRS, an algorithm that shows a card again right before you'd forget it). First hear the scene again with no captions, then see the sentence, then the translation, and rate how well you recalled it to set the next review. ■ Features · A minimal caption overlay on YouTube (one English line; translation only when you ask) · Shortcuts: S save / T translation / ←·→ previous·next line / R repeat · Sentence-level saving (add the line before or after), open the exact scene from your saved list · A review panel that replays just the saved clip in the YouTube tab, up to 15 new cards a day · Backup export and import (JSON) · Interface in English, Korean and Japanese ■ No account. Stays in your browser. · No sign-up. Your learning data is stored only in your browser and is never sent anywhere. · No ads, no analytics, no tracking. · Removing the extension deletes your saved data too, so export a backup from your saved list regularly. ■ Good to know · Works on videos with English captions (uploaded or auto-generated). Shorts are not supported. · Translations come from YouTube's auto-translated captions (Korean and Japanese). · This is a beta. Feedback and bug reports: hello@sayover.app Sayover is not affiliated with or endorsed by YouTube or Google. Privacy policy: https://sayover.app/privacy