Sioyek is described as 'PDF viewer with minimal interface optimized for reading research papers and technical books' and is a PDF Reader in the news & books category. There are more than 50 alternatives to Sioyek for a variety of platforms, including Windows, Web-based, Mac, Linux and Android apps. The best Sioyek alternative is SumatraPDF, which is both free and Open Source. Other great apps like Sioyek are Okular, Foxit PDF Reader, Evince and MuPDF.
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