#iOS devices have one great feature which is native support for PDF files. PDF being the industry standard in many fields enable print media to be delivered in its intended format. On iPhone theres a neat trick which is that you can convert many things to PDF without need of any app to be installed. To do this just look for the option to ‘create PDF’ in the share/action menu of apps. After the PDF is created you can either share it or export it to other apps/iCloud. You can also natively view PDFs in iBooks and save them there for later viewing.
Create PDF On iOS