Selv Skin vs Preen

Selv checks your skincare routine for ingredient clashes and puts every product in the right order, morning and evening. Add what you already use. Selv looks at the actives inside, flags pairs that don't belong in the same routine, like a retinoid and an exfoliating acid on the same night, and tells you what to do instead: alternate nights, move a step, or ask your dermatologist. WHAT SELV DOES - Routine Check: catches ingredient clashes across your morning and evening routines. - The right order: every step where it belongs, thinnest to thickest, sunscreen last. - Guided setup: tell Selv your sensitivities, preferences and favorite brands, and it checks for them. - Quiz picks: recommendations that work with what you already own. - What's in it: fragrance, sulfates, parabens and more, read from the ingredient list. - Stay consistent: streaks, reminders and your Skin Score. - Restock alerts: know a product is getting low before you run out. - Favorites and requests: heart the products you love, and ask us to add anything missing. HOW SELV WORKS - Free. You never pay. - Recommendations can't be bought. Brands can't pay to change what Selv tells you. - Your data is never sold. - No account needed. Your routine lives on your phone. Sign in only if you want it backed up. - Selv may earn a commission when you shop through a link in the app, at no extra cost to you. Selv is a routine tool, not medical advice. For prescription treatments, follow your dermatologist.

Preen is a calm, private skincare routine tracker. Check off your morning and evening steps, keep your product shelf fresh, and watch your skin change with photos, trends, and a streak that keeps you consistent. BUILT AROUND YOUR ROUTINE - Morning and evening checklists, one tap per step - A rhythm for every step: daily, every 2 or 3 days, weekly, or monthly - Skin cycling and other ready-made routine templates - Hair, body, and nail care alongside your face routine - A wait timer for steps that need to settle, like acids KNOW YOUR PRODUCTS - Product shelf with opened date and use-within (PAO) expiry alerts - Ingredient conflict warnings, like retinol with AHA and BHA - Wishlist, empties, and a would-buy-again note for every product - Cost per day for your full routine SEE YOUR SKIN CHANGE - Ten second daily check-in: how your skin feels, breakouts, dryness, redness - 30 day trend chart and a 0 to 100 skin score - Before and after photos with an alignment ghost for honest comparisons - A calendar of your history: tap any day to see what you used MADE FOR REAL LIFE - Cycle aware skin tips that follow your hormonal phases - Makeup days with a double cleanse reminder and a never-sleep-in-makeup streak - Weekly self care sessions and gentle DIY recipes - Travel mode with a packing list built from your routine - Home screen widget with today's progress and streak - Milestones and a 28 day Glow Challenge to keep you going PRIVATE BY DESIGN Everything stays on your phone. No account, no ads, no analytics, no data collection. Preen is free. Preen offers general skincare guidance, not medical advice. See a dermatologist for persistent skin concerns.