The question is: why paying for a scanner app when you can get it for free?
And the answer is here! Scanner Docs is the simplest and totally free app for you to create PDFs and share with everybody.
To create a PDF, just aim your phone to document, adjust the margins (the app can do it by itself, but you can crop some parts if you want to), add more pages if needed and one-click Export! Can't be easier!!
Improvements are coming to the app, so stay tunned!