There are times when you download a file from the internet, your phone cannot access or open the file that prevents you to look at the content of the said document. That's why Document Viewer: PDF, DjVu,... is here and you should reconsider downloading this application because it allows you to open different files without any hassle and challenges. Lastly, you don't have to worry about any hidden fees that will charge you once you have downloaded this application on your phone.