Any ICC profile
Use input, output and proof profiles, including DeviceLinks and Named Color profiles.
Built to be trusted
Own the tool.
Trust the code.
Lifetime licence
Buy once.
Keep it.
Keep it.
No subscriptions. No recurring charges. Buy calc ICC once, and it’s yours for life.
Built for the long term
Human-made code.
AI-slop free.
AI-slop free.
AI supports our testing, documentation and advertising. Humans write the app code for maintainability, security and repeatable results. Its core engine has powered production software for more than 20 years.
Made for real work
Serious color calculations in your hand.
Profiles, proofing, gamut checks and multichannel values remain clear even when you are away from the workstation.
Privacy
Your profiles and color values stay on your device.
Data collected
None. calc ICC does not collect personal information, usage data, diagnostics or identifiers.
Tracking
None. The app contains no advertising and does not track you across apps or websites.
Data transfer
None. Profiles, measurements and calculations are processed locally and are not sent to Little CMS or to third parties.
Account
No account or sign-in is required.
Your files
The app accesses only the files you choose through Apple’s document picker. You remain in control of those files.
Privacy policy effective 1 September 2026. If the app’s data practices change, this page will be updated before the change takes effect.
Built for serious color work
The details that make the difference.
A focused set of professional tools for confident color decisions.
ECG ready
Work with extended-gamut profiles and up to 15 channels.
Maximum accuracy
Powered by Little CMS, the industry-standard color-management engine.
Soft proof and gamut check
Preview conversions with soft proofing and check whether colors are inside gamut.
Maintain formula
Keep the ink formula in CMYK-to-CMYK conversions while maintaining the same Lab color.
Need help? Press and hold any key for quick help. For more detailed guidance, choose a tutorial below.