Lonely PDF
Chat with your PDF. Your files stay on device.
Download on the App Store Privacy
A quiet reading companion
Lonely PDF is a personal AI PDF reader for students, freelancers, and anyone who works with dense documents. Import a file, read with a calm paper-like viewer, and ask questions grounded in the pages you have open.
What you can do
- Import PDFs into an on-device library and continue where you left off
- Ask questions and get answers with tappable page citations
- Summarize a whole document or from the current page
- Create PDFs from photos or scans; merge, split, compress, and edit pages — all locally
- On-device OCR so scanned pages become searchable for chat
Privacy by design
Your original PDF files remain in the app sandbox. When you use AI chat or summarize, only the retrieved text snippets needed for an answer are sent to the AI server — not the whole file. No accounts. No ads. No analytics SDKs in v1.