Apps with 'Note extraction' feature

  1. PDF-XChange Viewer is an alternative viewer for PDF files that enables you to view and annotate PDF files. You can add text, sticky notes, and other annotations and save them to the file, which will be compatible with the standard...

    Discontinued

    Since November 2013 the Tracker Software company states that "PDF-XChange Viewer has been discontinued and replaced by PDF-XChange Editor " , but the software has been and is still being updated from time to time as of 2020

  2. Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.