This is a PDF app for Android and the best viewer for viewing PDF.

PDF Reader📖
Full screen immersive reading

View multiple file types📚
Support viewing a variety of office documents: pdf, word, excel, ppt, quickly view files

Other Features📝
Highlight the key points
Add strikethrough
Add underline
Brush marking and signature

Get permission to read system files
Allows open access to system files, making it easier to view PDF files on your system. Read PDF books and PDF notes on the go with this fast PDF reader.