I should note that none of these free apps allow you to make changes to existing text. And the best part is that all of the apps and software I recommend here are free. I'll walk you through basics like adding text, signing documents, adding annotations and filling out forms. Luckily we found easy and fast ways to edit a PDF file on an iPhone ( $899 at Amazon) and Android phone, as well as on a Mac and PC. Maybe you just need to sign a document or fill out a form. Sending PDF files is pretty straightforward, but editing one can be a hassle, especially on your phone's relatively small screen.
