Smart Product Comparator

Compare two products side by side: paste or photograph each ingredient list for plain-English notes and gentle flags. Signed in? Trigger Detective can help find patterns across products you’ve reacted to.

Sign in to check results against your personal allergy profile.

A Product A

0 ingredients detected

B Product B

0 ingredients detected

Add ingredients for both products

Tools

All toolsBrowse every free checker in one place.Ingredient scannerSnap a label or paste an INCI list—fast irritant flags.Patch test translatorTurn clinic allergen names into what to read on labels.Cross-reactor checkerSee related names and hidden sources for one allergen.Product comparatorCompare two formulas with plain-English ingredient notes.Ingredient conflict checkerFind actives that clash and a safer layering order.Trigger detectiveSpot ingredients that keep showing up when you react.

Making skincare safe for every skin.

AllerNote is an educational tool, not medical advice. We check products against known allergen databases but cannot diagnose allergies. For diagnosis, consult a board-certified dermatologist.