Spa Results You Can See.
Biometrics That Prove It.

Sleep Architecture

Deep, REM, light sleep staging — guests see exactly how spa treatments change their recovery quality overnight.

Heart Rate Variability

HRV is the gold standard for measuring stress and recovery readiness. Track how sauna, cold plunge, and massage shift the nervous system.

Recovery Score

A single daily readiness number that synthesizes all biometric signals — the definitive guest conversation starter for results-driven wellness programs.

Movement & Activity

Steps, active calories, training load — data that contextualizes the spa experience within the guest's broader health program.

Skin Temperature

A sensitive early-warning biomarker for illness, inflammation, and hormonal shifts. Tracks how infrared, cryo, and thermal therapies impact the body.

Glucose & Metabolism

The M1 CGM adds continuous glucose monitoring — the missing metabolic layer that makes nutritional wellness programs measurable and personalized.

Zero Recurring Costs

No Monthly Subscription — Ever

Unlike competitors, Ultrahuman charges nothing beyond the device. All features — sleep analysis, recovery scores, HRV, temperature, and app access — are included for life. This dramatically simplifies the math for spa operators deploying rings as amenities or retail products.

Ring PRO

Performance by Design

The most advanced smart ring Ultrahuman has ever built. The Ring PRO delivers clinical-grade biometric tracking in a precision-engineered titanium form factor with an embedded charging dock built directly into the ring — eliminating the external charger entirely. Every sensor has been upgraded for deeper, more accurate physiological data across sleep, recovery, HRV, heart rate, and skin temperature.

• Integrated charging dock — no external charger required
• Advanced PPG sensor for continuous heart rate and SpO2
• Skin temperature tracking for inflammation and recovery patterns
• Sleep architecture analysis: deep, REM, and light staging
• HRV measurement for daily recovery readiness
• Titanium construction — medical-grade, hypoallergenic
• No subscription fee — lifetime data access

Ring AIR

The World's Lightest Smart Ring

The Ring AIR is the original Ultrahuman ring — and at 2.4 grams it remains the lightest smart ring available. Designed for guests who want continuous biometric tracking without any wearable awareness, it captures the full spectrum of recovery, sleep, and cardiovascular data in a barely-there titanium form. Ideal as a premium spa amenity or take-home wellness gift.

• 2.4g titanium — lightest smart ring on the market
• Continuous heart rate and SpO2 monitoring
• Sleep quality scoring and staging
• HRV-based recovery readiness score
• Skin temperature trend tracking
• Water-resistant to 100m
• No subscription fee — all features included

M1 CGM

Continuous Glucose Monitoring for Real Results

The Ultrahuman M1 is a continuous glucose monitor (CGM) that reveals the metabolic impact of food, exercise, stress, and spa treatments in real time. Worn on the back of the upper arm, it transmits live glucose data to the Ultrahuman app — enabling spa nutritionists and wellness directors to build evidence-based metabolic health programs with measurable outcomes.

• Real-time glucose tracking — 24/7 continuous readings
• 14-day wear per sensor — no fingerstick calibration needed
• Reveals glucose response to meals, exercise, cold, and heat
• Pairs with Ring data for complete metabolic + recovery picture
• Enables spa nutritionists to track dietary program efficacy
• Ultrahuman app provides glucose insights and trend analysis
• Ideal for 2-week metabolic wellness retreats

Check-In Biometric Baseline

Provide each arriving guest with an Ultrahuman Ring AIR. Their first night's sleep, HRV, and skin temperature data establishes a personal baseline — creating a measurable 'before' that every subsequent spa treatment can be evaluated against.

Recovery Circuit Quantification

Track how sauna, cold plunge, Human Tecar therapy, and compression sessions shift the guest's HRV and recovery score in real time. Data turns a luxury service into a verifiable, outcomes-driven wellness program.

2-Week Metabolic Wellness Retreat

Pair the M1 CGM with spa nutrition consultations and personalized meal planning. Guests see their glucose response to every meal, treatment, and activity — and leave with 14 days of metabolic data that validates every recommendation your team made.

Premium Guest Amenity

Include the Ring AIR in a luxury welcome kit as a billable wellness amenity at $150–$250 above the base room rate. High perceived value, strong brand story, and meaningful differentiation from competing properties.

STI Biometric Recovery Circuit™

Ultrahuman is the data layer of the STI Biometric Recovery Circuit — pairing with Evolt 360 body composition scanning, Human Tecar deep tissue therapy, and TruMedX red light to create a complete, benchmarked guest wellness program with quantifiable outcomes.

Spa Director Analytics Dashboard

Aggregated (anonymized) guest recovery data gives spa directors a real operational signal: which treatments produce measurable HRV improvement, which sleep protocols drive best results, and which modality combinations generate the highest guest satisfaction scores.

Ultrahuman Ring

Biometric data layer — sleep, HRV, temperature, recovery

Evolt 360

Body composition baseline — fat mass, muscle, hydration

Human Tecar

Clinical deep tissue therapy — RF radiofrequency recovery

Infrared Sauna

Thermal stress adaptation — HRV improvement tracked by ring

TruMedX Red Light

Photobiomodulation — cellular recovery quantified by HRV

M1 CGM

Metabolic intelligence — glucose response to every intervention

3+ Night Eligibility

Guests booked for three or more nights are enrolled in the program at check-in by the hotel concierge or spa butler.

Ring Issued at Check-In

A sanitized Ultrahuman Ring AIR is fitted and activated by the spa team. Biometric tracking begins the first night.

Daily Wellness Coaching

Each morning, the spa butler reviews the guest's sleep, HRV, and recovery score and recommends same-day treatments.

Spa Discounts Unlocked

Program participants receive 15–20% off qualifying spa services throughout their stay — tied to engagement with the ring data.

Checkout Wellness Report

At departure, guests receive a personal biometric summary and curated at-home wellness recommendations from the STI team.

Revenue for the Property

Multiple Revenue Streams in One Program

The Guest Experience

A Wellness Story They Share

• Integrated charging dock — no external charger
• Advanced HRV, sleep, and skin temperature tracking
• Titanium — hypoallergenic, medical-grade
• No subscription fee — ever

• Ultra-lightweight titanium — barely noticeable
• Full sleep, HRV, and recovery tracking
• Water-resistant to 100m
• No subscription fee — ever

• No fingerstick calibration required
• Tracks glucose response to meals, spa treatments, stress
• 14-day wear per sensor — arm placement
• Pairs with Ring data for complete biometric picture

For Spa Operators

Stock Ultrahuman in Your Spa Boutique

STI provides wholesale inventory packages for spa boutiques — curated ring sizing kits, branded display stands, and staff training so your team can confidently sell and demo the product. Typical boutique margin is 35–45% on retail units.