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XnRetro vs Polarr: catalog facts
XnRetro	Polarr
Free Free download from the developer's site.	Freemium Free apps are available; pricing for advanced features is not stated on the homepage.
Windows, macOS, Linux	Windows, macOS, Android, iOS, Web
Many color, light and frame effects in one place Basic adjustments such as contrast, saturation and vignetting	Large library of creator-made filters Apps for phones, desktop and the browser
Focused on retro effects rather than general photo editing Closed source	Polarr Next is still in beta Closed source
Downloadable app	Downloadable app, Web application
Closed source	Closed source
License: Proprietary	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 October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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