- Sleep stages (Light, Deep, REM)
- 24/7 Heart rate monitoring
- Heart Rate Variability (HRV)
- Blood oxygen (SpO₂)
- Body temperature trends
- Daily activity & movement
Calmera Smart Health Ring
Calmera Smart Health Ring
🔒
NO SUBSCRIPTION. EVER.
Pay once • No monthly fees • No hidden costs
Regular price
$59.99
Regular price
$129.99
Sale price
$59.99
Low stock - Only 11 left - selling fast
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Delivery: 7–14 days
Advanced Health Metrics
Tracks your most important wellness data — day and night.
Precision Sensors
Built with advanced optical and motion sensors.
- Optical heart rate sensor (PPG)
- SpO₂ oxygen sensor
- Temperature sensor
- 3-axis accelerometer
Companion App
All insights in one clean mobile app.
- Clear daily dashboard
- Sleep & recovery scores
- Trends over time
- Apple Health & Google Fit
Real Results. Real People.
1,000+ customers chose Calmera Smart Ring to upgrade sleep, recovery & daily readiness.
Wake up with more energy.
Understand your body.
Without distractions.
Calmera Smart Ring helps you understand how your body actually recovers — so you can sleep better, manage stress, and perform at your best every day.
No screens. No notifications. Just clarity.
⭐
4.6 / 5 from 465+ real customers
Free Shipping · 30-Day Money-Back Guarantee
WHO IT’S FOR
Built for busy professionals who want more energy — without changing their routine
You’ll feel at home with Calmera if you:
- wake up tired even after a full night of sleep
- feel constant mental load, stress, or burnout
- don’t want to wear a bulky smartwatch 24/7
- want clear health insights — not complex charts and data
From sleep to energy.
In three simple steps.
Wear it to sleep
Put the ring on before bed. It tracks your body quietly all night.
Wake up with insights
See sleep quality, recovery, and readiness in one clear score.
Improve sleep & energy
Adjust your day based on how your body actually feels.
Product Details
Battery & Usage
Stay connected and track your day without interruption. The COLMI R09 smart ring comes with a 15–18mAh battery that lasts up to 7–9 days on a single charge. Designed to keep up with your lifestyle — day and night.
Premium Materials
Made from durable steel with a sleek, skin-friendly finish, this smart ring is lightweight (about 3.5g) and comfortable enough to wear all day, every day.
Waterproof & Durability
Certified 5ATM waterproof, the ring handles hand washing, rain, showers, and everyday adventures with ease. Durable, worry-free, ready for life on the go.
Activity & Fitness
Monitor your daily steps, distance, calories burned, and overall activity effortlessly. The ring is your lightweight companion for staying active and reaching your goals.
Health Monitoring
Advanced sensors track heart rate, sleep, blood oxygen, body temperature, and stress levels. Gain valuable insights into your health while keeping the ring discreet and stylish.
App & Connectivity
Seamlessly sync with your smartphone via Bluetooth. Track your progress, set goals, and receive notifications directly through the companion app.
Frequently Asked Questions
A smart ring tracks your sleep stages, heart rate, and body signals overnight, turning them into clear insights that help improve recovery and daily energy.
Yes. The ring is lightweight, screen-free, and designed for 24/7 comfort, making it ideal for uninterrupted sleep tracking.
Yes. Core sleep, recovery, and readiness insights work without a mandatory subscription.