Adobe Acrobat Reader - a mobile version of the famous application from Adobe that will allow you to fully work with documents in PDF format. At the same time, the android version is not much inferior to the desktop version while being optimized as much as possible for touch screens and other features of mobile devices. Separately, it is worth noting the ability to scan documents and edit them directly on the device. Full support for the Russian language and user-friendly interface will help you make the most of the application.