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Colordot vs 0to255: catalog facts
Colordot	0to255
Free The web version is free to use; iOS app pricing is not stated.	Freemium Can be tried for free; 0to255 Studio offers sign-up for an account.
iOS, Web	Web
Very simple mouse-driven picking Builds a palette by clicking	Shows all lighter and darker variations at once instead of using sliders Color grid clusters similar colors for quick scanning
Few features beyond picking and saving colors No contrast checking or export options described	Pricing for the Studio version is not clearly stated Needs an internet connection
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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