DandroidMobile has developed a great android app named MaxiPDF PDF editor & builder. This app is the best one to work with PDF files. It allows you to create, edit, view and annotate PDF files .
MaxiPDF main features are:
- Creation; to create any PDF file from a basic template. - Edit; to create/modify/delete text, images and vector drawing objects like curves, lines, paths. - View; to navigate/open the PDF files. The navigation options include pages, outlines or objects. - Annotate; to create/add and save comments directly inside the file. - Compatibility with any PDF file. - Free software.
This app is available in the Google Play Store