The list of supported formats
FullReader supports operating with such file formats as: fb2, ePub, txt, PDF, doc, docx, cbr, cbz, rtf, DjVu, DjV, html, htm, mobi, xps, oxps, prc, odt, rar archives, zip, 7z, MP3 audiobooks.
Rar, zip and 7z archives – only in case, when they contain supported by the reader file formats.
Docx – supported by devices with Android 5.0 and higher. In case the document contains a table, its structure will not be preserved.