Know exactly
what's in
your skincare.
Paste any product and we'll decode the ingredients, explain what each one does, and flag anything that clashes with what's already on your shelf.
Prefer to start with a full routine? Build one from scratch →
Already have a shelf full of products? Score your whole routine →
The 6 golden rules of skincare tap to read ▾
Routine Builder
Build Your Routine
Your routine — or stack, as we'll call it from here — is the ordered set of products you apply each morning and evening. Choose your skin type and time of day, toggle steps on or off, click ingredient tags to learn more, and save when you're done. We'll flag any ingredient conflicts live as you build.
Routine Time
Build your routine above and we'll instantly flag any ingredient conflicts, cautions or great pairings.
No known conflicts between the ingredients in your current routine.
Stay in the Know
Get your routine delivered.
We'll email you your personalised stack plus a short weekly note on new ingredients and research. No spam, unsubscribe anytime.
The Most Comprehensive Skincare & Longevity Reference
Skin Stacker Glossary
A complete reference covering every ingredient, technique, skin condition, label term, longevity concept and wellness principle you need to know. Click any card to open the full definition.
Ingredient Spotlight
Key actives at a glance — tap to explore
Ingredient Decoder
Decode any product
Search, scan or paste a skincare product to reveal what's actually in it — and get a plain-English breakdown of every active ingredient. Decode two or more and we'll flag any conflicts in your stack.
Reaction Triage
Why is my skin reacting?
Answer a few questions about what you're seeing and what you've been using. We'll cross-reference the active ingredients in your routine and rank the most likely causes — purging, irritation, allergy, fungal flare, true breakout, or something that needs a dermatologist's eyes.
1. What does the reaction look like?
Pick the closest match — it's fine if you're unsure.
2. Where is it showing up?
3. Any of these feelings? (pick all that apply)
4. How long has this been going on?
Answer all 4 questions to continue
5. Have you started anything new recently?
6. Which actives are in your current routine?
Tick any you're using right now. We use this to weight the likely cause — e.g. purging only happens with specific ingredients.
7. Are you in any of these situations? (optional)
Answer questions 5 and 6 to continue