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Annotate PDF on iPhone

Annotate your PDF files on iphone with BossPDF — the fastest PDF app for iPhone and iPad.

  • Highlight, underline, and draw on PDFs
  • Add notes and comments to any page
  • Designed specifically for iPhone users
Download BossPDF — Free
4.8
App Store | Free to try
4.8 on App Store
No uploads ever
Works offline
Privacy-first
No account needed
Quick Answer

To annotate PDF files on iphone, open BossPDF on your device, select your files, and tap Annotate. The entire process takes seconds and works right from your phone. No account needed.

How to annotate pdf on iphone

  1. 1

    Open BossPDF

    Launch the app and open the PDF you want to annotate.

  2. 2

    Select an annotation tool

    Choose highlight, underline, draw, or add a note.

  3. 3

    Mark up the document

    Highlight text, draw arrows, or add comments where needed.

  4. 4

    Use Apple Pencil

    For precision, use Apple Pencil to draw and annotate.

  5. 5

    Save your annotations

    Save the annotated PDF — markups are embedded in the file.

Ready to try it?

Get BossPDF — Free on the App Store

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Why this matters

You need to annotate a PDF, but you're on your iPhone with no computer nearby. Most PDF tools are built for desktop. You shouldn't need a laptop just to annotate a file.

Why BossPDF

  • Highlight, underline, strikethrough, and freehand draw
  • Add sticky notes and text comments
  • Full Apple Pencil support on iPad
  • Multiple colors and line thicknesses
  • Annotations are saved in standard PDF format

How people use BossPDF

Student

Highlighting key passages in lecture slides while studying.

Freelancer

Marking up a client's brief with questions and suggestions.

Teacher

Adding comments and corrections to student assignment PDFs.

Remote Worker

Annotating a proposal with feedback before sending to the team.

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Frequently asked questions

Is BossPDF free to annotate PDF files on iphone?

Yes, you can try every feature in BossPDF for free. Download from the App Store and start annotating PDFs immediately — no account or credit card needed.

Can I annotate multiple PDF files on iphone?

Absolutely. BossPDF supports batch processing so you can annotate multiple files at once. Select all the files you need and process them in a single tap.

Does BossPDF annotate PDFs on iphone without uploading my files?

Yes. BossPDF processes everything on your device. Your files are never uploaded to any server, making it completely private and secure.

What's the maximum file size I can annotate with BossPDF?

BossPDF handles large files efficiently. There's no hard file size limit — even documents with hundreds of pages process quickly on your device.

Fast. Simple. Done.

Stop fighting with PDF tools. Download BossPDF and get it done in seconds.

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