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Sim Daltonism vs Coblis: catalog facts
Sim Daltonism	Coblis
Free Open source; the page does not list a price.	Free Free to use in the browser.
macOS, iOS	Web
Live filtering of any screen area on the Mac Camera-based simulation on iOS	Images are processed locally and never uploaded No limit on image size
Apple platforms only Licence is not stated in the research	Works on images only, not live web pages Lens feature has known issues in Edge and Internet Explorer
Downloadable app	Web application
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is 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.