Available for Mac, iOS, Windows, and Android GoodNotes is one of the most popular note-taking apps for handwritten notes on the iPad, and functions as a PDF reader and PowerPoint slide annotator as well! Swipe or tap the Forward button to find Add Link, then tap Add Link. Used by half a million people worldwide, its powerful interface is crafted to cut out noise, let you focus on what you want to say, and help you structure and trim your text. iA Writer offers a unique writing experience that le