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ImageGlass vs FlowVision: catalog facts
ImageGlass	FlowVision
Freemium A free edition plus a paid Pro edition, listed at $14.90 as a one-time purchase for one…	Free Free and open source.
Windows, macOS, Linux	macOS
Over ninety formats natively, including WebP, JPEG XL, HEIC, AVIF, SVG, HDR and raw Fast navigation through large folders with predictive caching and hardware acceleration	Waterfall layout that preserves image proportions Browses both images and videos
Some features are reserved for the paid Pro edition The macOS and Linux builds are much newer than the Windows one	macOS only A browser and viewer, not an editor
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
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 September 20, 2026	Official website Full listing and sources Checked October 1, 2026

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