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XnRetro vs Nik Collection: catalog facts
XnRetro	Nik Collection
Free Free download from the developer's site.	Paid Commercial software from DxO.
Windows, macOS, Linux	Windows, macOS
Many color, light and frame effects in one place Basic adjustments such as contrast, saturation and vignetting	Dedicated black and white conversion tools Film look and creative filters
Focused on retro effects rather than general photo editing Closed source	Paid software Works as plugins inside other editors
Downloadable app	Downloadable app
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.