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We track the published IFRA Standards and note the amendment in Settings. Because standards evolve and materials vary, Accord is a guide — always confirm against the current Standards and your suppliers' certificates before selling.

Either. Choose during onboarding or in Settings; the pyramid, IFRA check, and dilution all follow your unit.

Yes — Pro keeps full version history so you can compare revisions and return to an earlier one at any time.

Completely. They're stored on your device by default; if you enable sync they go to your private account, are never shared or sold, and we don't read them.

Yes — enter a target volume and concentration and Accord gives you concentrate, alcohol, and water amounts.