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Add products
Select from the product list or paste the ingredient list.
LAYERED WITH INTENTION.
Check if your skincare products work together.
Built for calmer skincare, not more skincare. Norethia checks common product clashes, explains what they mean, and turns your products into a simple AM/PM routine.
- Clear verdicts
See whether your products look compatible, need extra care, or are better kept apart.
- Plain-English reasons
Understand what may be clashing and why it matters, without decoding ingredient lists.
- A simple AM/PM plan
Turn the products you already own into practical morning and evening steps.
- Less trial and error
Make calmer routine decisions before adding another product to the shelf.
Educational guidance only. Not medical advice. Always patch test new products and follow professional guidance where needed.
Start here with 2 products or an example, then get one clear verdict, the reason, and next steps.
Check my routine
Instant verdict + simple morning/evening plan.
Product sources are shown clearly where relevant.
No products added yet, search above or try an example.
Need deeper planning, saved scheduling, or full routine management?
Explore Routine ManagerVerdict
Choose at least 2 products, then tap Run check to see your verdict, reasons, and morning/evening plan.
NEW
Routine Pressure Check
Check if your skincare routine is doing too much.
Norethia helps you spot possible routine pressure points, organise products into calmer AM and PM routines, and understand when combinations may be too much for some people.
Routine pressure
A clear label of low, medium, or high routine pressure based on the products checked.
Routine pressure points
Short, plain-English notes about what Norethia noticed, such as multiple leave-on actives or stronger active combinations.
Gentler routine suggestion
A calmer way to organise the same products, with cautious wording and no medical claims.
Shareable routine check card
A simple visual card you can save or share, with a footer that keeps the note educational only.
Educational guidance only. Not medical advice. Norethia does not diagnose, treat, or replace advice from a dermatologist, doctor, pharmacist, or prescriber.
How it works
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Set options
Optional reactive-skin, barrier-repair, and prescription mode flags refine the check.
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Run check
Norethia evaluates combination patterns across your routine.
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Read verdict
Review reasons, scheduling guidance, and safer alternatives.
What it checks
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 Prescribed treatment mode is active, or a product appears to be a prescribed or prescription-style treatment, 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.
Prefer to check on the go?
Take the compatibility checker, routine manager, and ingredient library with you.