DewSkin: Skin Weather Guide

Use active ingredients like HA, glycerin, or retinol? DewSkin checks today's dew point and UV to tell you what to use, skip, or adjust in your skincare routine.

Stop guessing whether your hyaluronic acid serum is helping or hurting today. DewSkin checks the local dew point — the true measure of moisture in the air — and tells you exactly how your active ingredients will behave right now.

Most people don't know that HA and glycerin pull moisture FROM your skin on dry days instead of hydrating it. The dew point changes daily, and so should your routine.

HOW IT WORKS

1. Set up your skin profile: skin type and which active ingredients you use (HA, glycerin, retinol, vitamin C, AHA/BHA, niacinamide).
2. DewSkin fetches the current dew point, UV index, humidity, and temperature at your location.
3. You get a personalized Skin Score and ingredient-by-ingredient guidance: USE, ADJUST, or SKIP today. It takes 15 seconds to set up. No account required.

DEW POINT INGREDIENT GUIDE See at a glance which ingredients are safe today and which ones to avoid. HA and glycerin get a green, yellow, or red status based on the dew point. Tap any ingredient to read why.

SKIN SCORE A daily 0–100 score combining dew point, UV index, temperature, and humidity into one simple number. Know instantly whether it's a great skin day or a day to simplify your routine.

RETINOL & ACID CROSS-CHECK (PRO) Upgrade to Pro for deeper insights:

• Retinol + UV safety check
• AHA/BHA + UV photosensitivity warning
• Vitamin C stability guidance for heat and humidity
• Niacinamide + Vitamin C timing advice
• Hourly forecast to find the best skincare window
• AM/PM routine builder with live weather adjustment
• Unlimited product profiles
• Daily morning notification with today's routine tip

PRIVACY FIRST All your skincare profiles are stored locally on your device. No account, no tracking, no data shared. Location is used only to fetch weather data from a public weather service and is never stored on any server.

This app provides general skincare guidance based on publicly available weather data. It is not medical advice and does not replace consultation with a dermatologist.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/