Hedgehog reader

An app for reading books and organizing a personal library. The supported formats are FB2, MOBI, EPUB, DOCX, CBZ, CHM, RTF, HTML, MHTML, WebArchive, PDF, MD, 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 shelves structure with search and filtering by genre, keywords, languages, series, and ratings. An ability to translate (even when there is no Internet connection) selected words and phrases to the chosen language, by presetting the list of languages to translate from. An ability to perform a full-text search throughout the entire library and the notes added to books. An ability to quickly correct typos in a book. Reading the text aloud (even when there is no Internet connection) 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. Automatic synchronization of library content (and reading progress) across multiple devices.