Lonely PDF
Chat with your PDFs privately
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Open a PDF, ask questions, and jump straight to cited pages. Files stay on your iPhone — only the snippets needed for answers leave the device.
Lonely PDF transforms any PDF document into your personal reading companion.
Import lecture notes, reports, or research papers and enjoy a focused reading experience with an interface designed to mimic the feel of paper. Ask questions about the content and receive answers based directly on the text—complete with clickable page references so you can easily verify the information.
Key Features
• Import PDFs from the Files app and save them locally on your device
• Supports continuous scrolling and an optional night mode
• Flexible editing and document merging
Privacy-First Design
Your PDF files are stored within Lonely PDF’s isolated sandbox environment at all times.
Designed for students, freelancers, and anyone who needs to read complex PDF documents while on the go.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, RED STONE NETWORK TECHNOLOGY LIMITED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- RED STONE NETWORK TECHNOLOGY LIMITED
- Size
- 3.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © LonelyPDF2026