Readdle has long been one of my favorite developers for iOS. They make other great iOS apps like Documents (closest thing to a finder you will get on iOS), Spark (the best iOS email app in my opinion), Scanner Pro, and Calendars 5. Please check out their full set of apps at the Readdle web site.
And now to the point of this blog post. If you want or need a great workflow for managing and editing PDF's from both Mac and iOS, you should take a look at the new PDF Expert 2 now available for the Mac. Check out the video below or click here to learn more.
Now if they would only make a version of their Spark email client for the Mac... I would be all set!