Nativ turns your own PDF textbooks into a personal AI language tutor. Upload once — the AI indexes the entire book (text + OCR for scans) and answers every question grounded in your actual content. Say "explain this page" and the AI already knows which page you're on. No more copy-pasting into ChatGPT. Features: TTS pronunciation listening, STT accuracy scoring, vocabulary notebook, highlights, and rich-text memos — all in one view. Supports 9 languages. Try as a guest, no sign-up needed.