KOReader is described as 'An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Kindle, Kobo, PocketBook, Linux and Android devices' and is a popular PDF Reader in the news & books category. There are more than 50 alternatives to KOReader for a variety of platforms, including Android, Windows, Linux, Android Tablet and Mac apps. The best KOReader alternative is SumatraPDF, which is both free and Open Source. Other great apps like KOReader are calibre, Okular, Librera Reader and Readest.
KOReader alternatives are mainly Ebook Readers, but if you're looking for
PDF Readers or Ebook Libraries you can filter on that. Other popular filters include
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Android + Open Source. These are just examples - use the filter bar below to find more specific alternatives to KOReader.
Not the same functionality. One is an e-book reader. The other is an e-book manager