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Phoenix Slides vs Viso: catalog facts
Phoenix Slides	Viso
Free Free download, with donations accepted.	Paid Costs $7.99 after a free trial.
macOS	macOS
Pre-cached full-screen slideshows Fast thumbnails using embedded previews, including from raw files	Clean frameless viewing window Shows detailed image metadata including lens and location
macOS only Viewer and browser rather than a full photo editor	macOS only Paid after the trial
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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