A full version app for Android, by AK2.

PDF and DJVU Reader is an application that can read a number of different file formats. It is based on the open source Java library and can be used without having to pay any fees. The application has a user-friendly interface that allows you to browse your files quickly and easily. It is very simple to use and has a clean and modern design. It is the best PDF reader for Android.

Aside from PDF, this platform can also read DJVU, XPS, EPUB, MOBI, RTF, FB2 (including zipped), and even CBR and CBZ. 

It has an efficient and effective way of rendering, supports multi-page reading. and has automatic page-turning support.

The application can also be used to edit PDFs. You can add notes, highlight words, and make changes to the text.