Your iPhone can be a powerful PDF workstation with the right apps. Whether you need to read, annotate, sign, or edit PDFs on the go, these apps have you covered.

Best Overall: Adobe Acrobat Reader

The official Adobe app remains the top choice for iPhone PDF handling:

• Excellent rendering quality
• Full annotation tools
• Form filling and signing
• Cloud storage integration
• Organize and merge PDFs

Best for Annotation: PDF Expert

PDF Expert offers a smooth annotation experience:

• Easy highlighting and notes
• Sticky annotations
• QuickLook integration
• Beautiful interface

Best Free Option: Files App

Don't overlook Apple's built-in Files app:

• View PDFs natively
• Basic annotation with markup tool
• Fill forms
• No downloads needed

Best for Signing: DocuSign

When you need legally binding signatures:

Best for Scanning: Adobe Scan

Turn your camera into a PDF scanner:

• Auto-capture and crop
• OCR text recognition
• Automatic enhancement
• Direct export to PDF

What to Look For

• File size: Some apps are surprisingly large
• Cloud integration: Does it work with iCloud, Dropbox, Google Drive?
• Offline mode: Can you work without internet?
• Security: Look for encryption and privacy features