Upgrade your plan
Unlock more features to boost your learning
- 50 Deja quotaOne-time allocation
- 50 video savesBackend storage & word processing
- 50 words save limitWord collection cap
- Subtitle extractionYouTube, Bilibili & TikTok
- Local subtitle recognitionOn-device processing
- 500 quota/monthDeja quota
- Unlimited savesWords, sentences & phrases
- Unlimited storageBackend storage & word processing
- Deja high-quality subtitlesAI-powered generation
- Deja high-quality translationAI translation for subtitles
- 1,000 quota/monthDeja quota (2x)
- All Premium featuresEverything included
- Early accessNew features first
- Anki exportWords & sentences
- Priority supportGet help faster
Frequently Asked Questions
Deja quota is the credit unit for AI features. Different features cost different amounts:
Free: 50 initial quota · Premium: 500/month · Ultra: 1,000/month
DejaVocab is a Chrome extension and iOS app for learning languages through YouTube, Bilibili, and Podcast content:
Subtitle extraction — Automatically fetch subtitles from YouTube and Bilibili videos, or generate AI subtitles for any video/podcast.
AI Translation — High-quality subtitle translation powered by AI, not machine translation.
Word & Sentence Collection — Save words and sentences from videos. Every word tracks all sentences it appeared in, and each sentence links back to the exact video timestamp.
Phrase Extraction — AI extracts useful phrases, idioms, and collocations from subtitles.
Sidebar AI Chat — Chat with AI about the video content while watching.
Anki Export — Export words and sentences directly to Anki for spaced-repetition learning.
Premium — 500 quota/month, unlimited word/sentence saves, AI-powered subtitle generation, high-quality translation, unlimited sidebar AI chat.
Ultra — 1,000 quota/month (2x), all Premium features plus early access to new features and priority support.
Lifetime — One-time payment, monthly quota accumulates forever, exclusive member ID, direct community access with the founder.
