The NYT recently ran a
story about George Guidall, prolific audiobook narrator.
In one of their picture G. Guidall is reading on a tablet and is using a PDF-annotating app:
link to image.
Can anybody identify which app is that, from the screenshot?
I'm interested in apps that lets you write (i.e. with a stylus) over PDFs, so I'm curios to know what's in the toolbox of a pro such as Mr Guidall.