World's First English K-Beauty Intelligence Platform

K-Beauty Intelligence,
Powered by AI

6,200+ products. 10,300+ ingredients decoded. 6 AI specialist agents. From label scanning to routine building — every decision backed by real intelligence.

Scanning label...

COSRX Advanced Snail 96

Live

Snail Secretion Filtrate

96

Sodium Hyaluronate

88

Allantoin

92

No conflicts with your routine

Core Intelligence

The Foundation of Smarter Skincare

Six AI-powered pillars — from label to routine to community.

Korean Label Decoder

Point your camera at any Korean label for instant ingredient translation, safety scoring, and personalized skin match.

AI Beauty Advisor

Yuri — your personal AI advisor backed by 6 specialist agents, cross-session memory, and your full skin profile.

Smart Routine Builder

AI-generated routines with ingredient conflict detection, layering order, wait times, and skin cycling schedules.

Counterfeit Detection

Spot fakes before you buy with AI-powered packaging analysis, batch code verification, and crowdsourced signals.

Price Comparison

Compare prices across Korea and US retailers — YesStyle, Soko Glam, Olive Young, Amazon, and more.

Community Reviews

Reviews filtered by skin type, Fitzpatrick scale, age, and concern — not just star ratings.

Beyond the Basics

Features No Other K-Beauty App Has

Built for the ingredient-obsessed, the budget-conscious, and the routine-perfectionists.

Viral

Glass Skin Score

AI photo analysis scores your skin across 5 dimensions. Track progress over time and share your results.

Popular

K-Beauty Dupe Finder

Find $12 alternatives to $94 products. Ingredient-level matching shows exactly where the overlap is.

High Intent

Sunscreen Finder

Filter by PA rating, white cast, finish, under-makeup compatibility — every detail K-beauty sunscreen lovers need.

Unique

Shelf Scan

Photograph your entire collection. Get a routine grade, redundancy alerts, gap analysis, and estimated value.

Power User

Ingredient Filters

Search 6,200+ products by ingredients you want and ingredients you avoid. Fragrance-free and low-comedogenic shortcuts built in.

Unique

Expiration Tracking

Track when you opened each product. Get alerts before they expire. No more guessing if that serum is still good.

Proactive

Weather-Adaptive Alerts

Real-time weather data adjusts your routine. High humidity? Skip the oil. UV spike? Reapply sunscreen reminder.

Unique

Cycle-Aware Routine

Opt-in hormonal cycle tracking adjusts your skincare by phase. Luteal breakouts get BHA, not just moisturizer.

Meet the Team

6 Specialist AI Agents. One Advisor.

Yuri routes every question to the right specialist — each with deep domain expertise in Korean beauty.

Ingredient Analyst

Deep ingredient science — safety ratings, comedogenic scores, interaction warnings, and INCI translation.

Routine Architect

Builds personalized AM/PM routines with Korean layering order, wait times, and skin cycling schedules.

Authenticity Investigator

Spots counterfeits through packaging analysis, batch codes, seller reputation, and crowdsourced signals.

Trend Scout

Tracks what's trending in Seoul — TikTok virality, Reddit buzz, and Korean market signals before they hit the US.

Budget Optimizer

Finds ingredient-matched dupes at a fraction of the price. Same key actives, dramatically lower cost.

Sensitivity Guardian

Allergy and reaction prevention — flags irritants, cross-references your history, and protects sensitive skin.

All specialists report to Yuri — your personal AI beauty advisor who knows your skin profile, history, and preferences.

AI Beauty Advisor

Try Yuri (유리)

Ask her anything about Korean skincare — no signup required.

Visitor

Is the COSRX Snail Mucin I bought on Amazon real? The texture feels different.

Yuri

Great question! Here's what to check: 1) The holographic sticker on the box should shift colors when tilted — fakes often have a static print. 2) Real COSRX has a subtle honey-like scent, not fragrance-free. 3) Check the batch code on the bottom — I can verify it if you share a photo. Amazon has had counterfeit issues with this product specifically. Want me to walk you through a full authenticity check?

How It Works

Four steps from curiosity to confident skin.

01

Scan or Search

Camera scan a Korean label or search 6,200+ products across 590+ brands.

02

Get AI Intelligence

Yuri and 6 specialist agents decode ingredients, flag conflicts, check authenticity, and compare prices.

03

Build Your Routine

Add to your personalized routine with conflict detection, layering order, wait times, and skin cycling.

04

Track and Improve

Monitor your Glass Skin Score, track product expiry, get weather alerts, and discover dupes.

Why Seoul Sister Exists

Korean consumers have Hwahae — 187,000 products, 5.7M reviews, ingredient-level intelligence. English speakers have nothing. Until now.

Ingredient-Level Intelligence

10,300+ ingredients decoded with safety ratings, comedogenic scores, and function explanations. Every product analyzed down to the INCI list.

Learning Engine

Every scan, review, and routine adjustment teaches the system. Recommendations improve as the community grows — a dataset no competitor can replicate.

Real-Time Korean Trends

Track what's trending in Seoul before it hits the US market. TikTok, Reddit, Instagram, and Korean market signals — all in one feed.

Trusted by K-Beauty Enthusiasts

The intelligence platform built for ingredient-literate skincare lovers.

6,200+

Products Tracked

590+

K-Beauty Brands

10,300+

Ingredients Decoded

6

AI Specialists

Yuri caught a retinol-AHA conflict in my routine I'd been ignoring for months. My skin barrier has never been better.

Maya K.

Combination skin, Fitzpatrick III

I saved $40 on my Sulwhasoo by finding the same key ingredients in a $12 alternative. Budget Optimizer is unreal.

Lily C.

Dry skin, Fitzpatrick II

My Glass Skin Score went from 54 to 73 in two months. Seeing the radar chart improve keeps me consistent with my routine.

Jenna T.

Normal skin, Fitzpatrick IV

The sunscreen finder finally helped me find a PA++++ with zero white cast that works under makeup. Game changer for daily wear.

Priya S.

Oily skin, Fitzpatrick V

Simple, Transparent Pricing

One plan. Full AI intelligence. Cancel anytime.

Full AI Intelligence Suite

Seoul Sister Pro

$39.99

/month

Cancel anytime. No commitment.

  • Full Yuri AI advisor (Claude Opus)
  • 500 Yuri conversations/month
  • All 6 specialist agents
  • 30 label scans/month (Vision AI)
  • Smart routine builder with conflict detection
  • Glass Skin Score photo tracking
  • K-Beauty dupe finder
  • Sunscreen finder with PA/white cast filters
  • Shelf scan collection analysis
  • Ingredient include/exclude search
  • Expiration & weather-adaptive alerts
  • Counterfeit detection & price comparison
  • Community reviews & trending
  • Cross-session memory

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Join the community of ingredient-literate K-beauty lovers who make smarter skincare decisions.

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