KOReader – an application designed to read e-books and view documents of various formats. Initially, the software was developed for Kindle, Kobo and PocketBook, but then it was adapted for Android devices. KOReader supports EPUB, MOBI, DjVu, DOC, PDF, FB2, TXT, HTML, XPS, CBT, CBZ, RTF, ZIP and other file formats. The software comes with a large set of features to set the font, line spacing, text style, word wrapping, distance from fields and other parameters to the personal needs of a reader. KOReader allows you to download dictionaries in different languages in order to find word meanings or to highlight an unknown word and see its meaning on Wikipedia. KOReader enables you to view the contents of the book, go to the desired page, add bookmarks, search for words in the text and automatically turn the pages over a set time interval. The application can connect to the Caliber server, read articles from Wallabag, synchronize notes with Evernote and work with the news downloader.