RehearLab - English Listening Trainer

RehearLab helps English learners turn YouTube videos into sentence-level listening practice. Instead of replaying tiny caption fragments, RehearLab organizes captions into clearer sentences so you can listen, mark, review, translate, and build vocabulary from real video context. Core features: - Sentence-level replay for YouTube videos - Review panel for difficult sentences - Subtitle mask for focused listening - Local learning history and review queue - Context vocabulary notebook - Optional translation support - Local-first data storage RehearLab is designed for learners who want to practice with real English videos, not isolated textbook sentences. Current privacy model: Learning data is stored locally in your browser. When you use optional translation or dictionary features, the selected text may be sent to the configured translation or dictionary service to provide that feature.