Sleep Analysis
Heart Rate Trends
Blood Oxygen Trends
Activity Tracking
Temperature Trends
Lifetime App Access
THE DETAILS
Performance in Every Detail
Engineered for Everyday Wear
Designed with a smooth, ergonomic profile, XONYL Core measures 8.0 mm wide with a 2.85–2.9 mm thickness for a secure, comfortable fit throughout workouts, recovery, and everyday routines.
Built to Stay Ready
With up to 10 days of battery life, 5ATM water resistance, 15 days of onboard data storage, Bluetooth connectivity, and contact-case charging, XONYL Core is made for consistent daily tracking.
Advanced Tracking Inside
A PPG sensor, skin-temperature sensor, and 3D accelerometer work together to support activity, heart-rate, sleep, workout, SpO₂, and HRV insights through the connected app.
FITNESS & RECOVERY
Every Move, Measured With Purpose
XONYL Core brings your activity, heart rate, workouts, and recovery signals into one connected view—helping you understand effort, progress, and everyday performance beyond basic step counting.
All-Day Activity Tracking
Sleep & Recovery View
Workout Monitoring
24/7 Heart Rate Tracking
YOUR HEALTH
A Clearer View of Your Daily Health
XONYL Core connects with the companion app to bring your sleep, blood oxygen, skin temperature, calories, workouts, and overall fitness trends into one clear view—helping you better understand how your body responds throughout the day and night.
Fitness Age
Sleep Tracking
Blood Oxygen
Skin Temperature
Workout Detection
Calorie Tracking
GOT QUESTIONS
Frequently Asked Questions
How does XONYL Core assess metabolic risk trends?
XONYL Core uses the supplier’s BGEM, or Blood Glucose Estimation Model, to identify metabolic-risk trends through HRV and pulse-wave analysis. The results are intended to provide wellness insights and are not a replacement for blood-glucose testing or medical diagnosis.
Can XONYL Core estimate VO₂ Max?
Yes. XONYL Core can estimate VO₂ Max during physical activity, giving you an indication of cardiorespiratory fitness and how effectively your body uses oxygen during exercise.
Can I wear XONYL Core while swimming?
Yes. XONYL Core has a 5ATM water-resistance rating and is suitable for pool swimming, showering, and aquatic workouts
What does Fitness Age mean?
Fitness Age compares your cardiovascular performance with statistical age groups to show how your current fitness level relates to people of a similar age.
How is XONYL Core different from a fitness band?
XONYL Core provides similar fitness and wellness insights in a smaller, screen-free ring form that is designed to feel more discreet and comfortable for continuous day-and-night wear.
Can XONYL Core automatically detect workouts?
Its built-in 3D accelerometer identifies different movement intensities and automatically organizes detected activity within the companion app’s reports.
How often does XONYL Core measure health data?
Heart rate and blood oxygen are measured periodically, with intervals such as every 30 to 120 minutes depending on the app settings. Manual real-time checks can also be started through the companion app.
How long does the battery last?
XONYL Core provides up to 10 days of battery life under normal use. Actual battery performance may vary depending on measurement frequency, connected features, and usage habits
UNDER THE HOOD
Tech Specifications
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