6LETTERS DIGITAL HEALTHCARE · AI-POWERED HORMONE PLATFORM
Non-Invasive Testosterone Monitoring via Apple Watch
No blood draw. No clinic. Just your Apple Watch.
AI analyzes your HRV data to monitor testosterone-related
physiological patterns in real time.
MEASURE YOUR INVISIBLE HORMONES
A key signal behind disease, aging & vitality.
Hormones are the key signal behind disease, aging, mental health, and hair loss.
Until now, there was no way to measure them in daily life.
MOJO KING uses AI to analyze Apple Watch HRV signals — no sensors, no blood draws — to continuously track testosterone-related patterns.
CHOOSE YOUR INTELLIGENCE
Unlock Male Vitality. Master Your Rhythm.
Real-time testosterone intelligence for peak performance.
Track hormone responses before and after resistance training. Monitor sleep, energy, and vitality. Manage your daily condition with Teto Guy / Egen Guy insights.
Holistic hormone care for energy, mood, and every life stage.
A women's hormone analytics platform covering the full spectrum of life. Coming soon.
CORE TECHNOLOGY
Three pillars of precision hormone intelligence.
Monitor your current hormonal status in real time via AI. No hospital visits, no waiting rooms — anytime, anywhere.
Transform subjective symptoms into medical-grade, actionable insights — giving you objective hormone health data you can actually use.
Our PCT-patented error correction engine filters noise to deliver high-precision data suitable for medical-grade applications.
App data meets personalized health service.
Connect MOJO KING with SORO to go beyond simple measurement and unlock personalized hormone management. Once connected, your app data syncs automatically — giving you expert coaching and long-term trend reports.
Automatic HRV data collection · Real-time AI analysis
soro.6letters.co.kr · Live measurement results
Trend analysis · Custom guidance · Expert connection
Unified female hormone platform management
* Posts published in SORO automatically appear here.
* Inquiries: sungjin.kim@6letters.co.kr
GET STARTED NOW
No blood draw. No clinic. Just your Apple Watch.