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PhotoQt vs Lyn: catalog facts
PhotoQt	Lyn
Free Free and open source. The developer asks that you consider donating to humanitarian relief…	Paid Paid app with a fully featured 15-day free trial.
Linux	macOS
More than 140 image formats, plus photo spheres, motion photos and Apple live photos Embedded and interactive maps for images with GPS data	Reads RAW, HDR and all formats macOS supports Non-destructive editing with curves and levels
Image manipulation is per-session only; it is a viewer, not an editor Some features need extension packages that not every installer includes	macOS only Paid after the 15-day trial
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	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 21, 2026	Official website Full listing and sources Checked September 24, 2026

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