PDFs are great, portable, cross-platform documents that you can read on your Mac, your iPad or iPhone, or on a PC. But this ubiquitous file format is also useful when you need to share works in ...

Recognizing the utility of Markup annotation tools, Apple has extended their availability in recent versions of iOS, but it's worth bearing in mind that you can access a similar and equally useful ...

Google’s push to optimize its first-party apps on tablets continues with Drive for Android adding the ability to annotate PDFs using a stylus or finger. You will be able to “use your finger or a ...

PDF Expert by Readdle is my favorite app to collect, read, and annotate PDF documents on the iPad, and thanks to a series of updates in the past months it’s also become a solid alternative to iBooks ...