Helicon

Notes in the margin of your PDFs.

Hold a finger in the margin of a PDF, and a pin drops beside the line. The pin opens a note that never runs out of room: type in it, draw in it, or record your voice.

Join the beta on TestFlight

Or get the link and news by email.

Free, for iPhone and iPad with iOS 26 or later.

On scanned pages too.

Helicon reads the text of a scanned page, so you can select its words like on any other PDF.

Your place, kept.

Close the book or the app, and Helicon opens at the same spot on the page, at the same zoom.

What Helicon does today

  • Pins in the margin
  • Text from scanned pages
  • Apple Pencil ink
  • Checklists and voice notes
  • Your place on the page, kept

Read more on the Helicon home page.

Try Helicon on your next book.

Join the beta on TestFlight

Or get the link and news by email.

Free, for iPhone and iPad with iOS 26 or later.

Questions or ideas? Chat with us on Discord.