LAYERED WITH INTENTION.

SKINCARE, WITHOUT EXCESS.

Check compatibility, understand why, and keep your routine organised.

For educational use only. Not medical advice. Always patch test before using new products.

Designed to reduce irritation and overbuying.

NORETHIA

Skincare Routine Planner

A clear answer
Looks compatible, use with care, or avoid combining, so you know what to do next.
The reason, with clear, considered explanations
No chemistry degree needed. We explain exactly what's clashing and why it matters for your skin.
A morning & evening plan
Practical layering steps you can follow that same day, tailored to the products you already own.

Start here with 2 products or an example, then get one clear verdict, the reason, and next steps.

Check my routine

Instant verdict + safe morning/evening plan.

Shared results remain identified as Norethia reviewed or Open Beauty Facts.

No products added yet, search above or try an example.

Need deeper planning, saved scheduling, or full routine management?

Choose at least 2 products, then tap Run check to see your verdict, reasons, and morning/evening plan.

1

Select from the product list or paste the ingredient list.

2

Optional reactive-skin, barrier-repair, and prescription mode flags refine the check.

3

Norethia evaluates combination patterns across your routine.

4

Review reasons, scheduling guidance, and safer alternatives.

Retinoids + acids

Flags retinoid with AHA/BHA layering when the routine may be too aggressive in one session.

What to do: split into morning/evening use or alternate evenings, and reduce frequency if sensitivity is high.

Benzoyl peroxide conflicts

Highlights pairings where benzoyl peroxide with other strong actives can increase dryness and irritation.

What to do: separate timing and add barrier-support steps around stronger treatments.

Vitamin C + low pH stacking

Checks for Vitamin C combined with strong acids in ways that may over-stack actives in one routine.

What to do: use Vitamin C in the morning and move acids to evening routines.

Prescription treatment mode

When a prescribed skin treatment is detected alongside other actives, Norethia adds a caution note about layering without prescriber guidance.

What to do: check with your prescribing clinician before adding extra actives to an existing prescription routine.

Reactive-skin caution adjustments

Tightens thresholds where stacked actives could be tolerated poorly by easily irritated skin.

What to do: start low and slow, patch test, and monitor response before increasing use.