A free app for Android, by Android Tools (ru).

eReader: reader of all formats

eReader is a universal reader for books of all formats. It can open e-books, PDFs, comics, magazines, and other documents. It also allows you to view and read your e-books on the go, even offline.

The eReader app is designed to be as simple and intuitive as possible, so you don’t need to have any prior knowledge to start using it. It’s a universal app that can be used on any Android device, so it’s easy to use and compatible with a variety of devices.

eReader supports all e-book formats, including PDF, FB2, EPUB, CBR, RTF, HTML, DOC, XML, and more. You can easily search for a specific document or book by title or author.