Hedgehog reader

An app for reading books.
The supported formats are FB2, MOBI, EPUB, CBZ, CHM, RTF, HTML, MHTML, WebArchive, PDF, TXT and MP3, M4A, M4B for audiobooks.
Import from local devices, iCloud, and Dropbox, as a single book and as a batch.
An ability to create an internal shelf structure, with search/filtering by genres and keywords.
An ability to translate selected words and phrases to the chosen language, by presetting the list of languages to translate from.
Reading the text aloud with different variants of speed and operating from the music control.
Bookmarks and notes with the ability to upload the latter as a file.
An ability to directly download books from servers that support OPDS.