Signing and returning PDFs on your iPhone is easier than doing it on paper. Photo: Charlie Sorrel/Cult of Mac Scenario: Your divorce papers finally came through, and you can’t wait to sign the things.

The PDF is a business mainstay, a way to preserve and share documents while keeping them pristine and secure. Of course, there are times when you want to be able to mark them up, to add notes, ...

I use an app called 'Papers' ( http://www.papersapp.com), on both the Mac and the iPad. It's designed for managing libraries of scientific/technical papers. Not the ...

With Readdle’s $4.99 PDF Expert app, you can now perform text highlighting, add notes, and include finger-drawn markup on any PDF. You can also add text underlining and strikethrough. To round things ...