PDF

PDF annotation apps

Recommended

• PDF expert: In the past, it had an issue of randomly obliterating annotations. But it’s a very convenient app with integration into the finder.
• GoodNotes

Trying

• GoodNotes
• Notability

How to manipulate PDFs?

• Automate the boring stuff with Python:Working with PDF and Word Documents

Data extraction from PDF

• Number of pages
  • qpdf --show-npages file.pdf
• Camelot: PDF Table Extraction for Humans