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apvlv vs Sumatra PDF: catalog facts
apvlv	Sumatra PDF
Free Free and open source.	Free Completely free and open source with no ads, bundled software or subscription. No account…
Windows, Linux	Windows, Command line
Vim-style keyboard navigation Opens both PDF and EPUB	Opens PDF, EPUB, MOBI, FictionBook, CBZ/CBR/CBT/CB7, DjVu, XPS, CHM, SVG and many image formats including HEIC and AVIF Lightweight and fast; the portable single .exe build writes nothing to the registry
Small user base Keyboard-centric interface takes learning	Windows only (Windows 7 through 11; XP and Vista need version 3.1.2); no macOS or Linux version Only unencrypted EPUB and MOBI/AZW ebooks open; DRM-protected files are not supported
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-3.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.