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Sim Daltonism vs WhoCanUse: catalog facts
Sim Daltonism	WhoCanUse
Free Open source; the page does not list a price.	Free Free to use; the developer accepts GitHub sponsorships.
macOS, iOS	Web
Live filtering of any screen area on the Mac Camera-based simulation on iOS	Previews each color blindness type and other vision conditions Shows share of people affected by each condition
Apple platforms only Licence is not stated in the research	Checks one color pair at a time Does not scan a live web page
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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