I have Adobe Reader, which is free to handle basic functions such as read PDF. If I want to do more like select a picture and edit/add comments to a PDF, but you need to subscribe ($9.99/mo.) to use the add-on feature. Are their any other FREE apps out there that will allow me to do what i need that works like Adobe?
I personally use PDFPen Pro 2 : Link
If you like the iPad app, and you have a Mac, I would recommend buying PDFPen or PDFPen Pro for your Mac. (I have PDFPen Pro for my Mac and like it more than Acrobat Pro.)
Hope this helps.
MacGuy47