Evince
6.5#6 in file viewer softwareFree planFree planLinux
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Evince suits Linux users who need to view supported documents, fill forms, or annotate PDFs. It is not suited to editing document contents.
It suits people who want to read supported files offline on Android or Windows, including users who need previews or in-file search. Android users who need spreadsheet editing should note that it does not provide full workbook recalculation.