O Ring

$239.99
O Ring

A lightweight titanium smart ring made for all-day, every-night comfort. It tracks your sleep, heart rate, stress, activity, and cycle patterns—then translates your body’s signals into simple, meaningful insights - No subscription required.

Your Body Speaks. We Listen.

Two people playing dominoes with o ring on their hands.

O Ring

24/7 Unobtrusive Sensing – Measures stress, sleep, heart rate & SpO2 without asking.

Worn Daily, Felt Rarely.

  • 24/7 Wearing Comfort
  • Lightweight Titanium Build
  • Smart Sensing Technology

What O Ring Does

The man was covering his head with his hands, seemingly under great pressure; he had O-rings on his fingers.

Technical Specifications

What is included:

Sensors
Sensors
PPG + Temp + Accel
Battery Life
Battery Life
5 - 8 Days
Charging Time
Charging Time
2 Hours
Materials
Materials
Titanium alloy
Weight
Weight
0.1 oz to 0.13 oz
Thickness
Thickness
4 mm
Connectivity
Connectivity
Bluetooth
Compatibility
Compatibility
iOS & Android

Ova Health Insight

  • Turning your body signals, daily rhythms, and reflections into clear insights about your current state.

Download opove app

Frequently Asked Questions

What does O Ring track

Sleep
Stress
Heart Rate
Blood Oxygen
Fingertip Temperature
Activity: Daily steps and multiple sports
Women's Health: Cycle insights and fertile window

How do I find my correct size?

To find your perfect O Ring size, we recommend ordering our $1.5 Sizing Kit—this fee will be deducted from your final purchase as a discount. The kit includes eight test rings (sizes 6-13), wear the appropriate size for 24 hours to account for natural finger size fluctuations throughout the day, then choose the size that feels snug but not tight and doesn't shift when you move.

If you prefer to measure manually, you can refer to our size guide for instructions.

How to wear the O Ring correctly?

For optimal performance and accuracy, it is recommended to wear the ring on the index finger of your non-dominant hand. You can also wear it on the middle or ring finger if preferred. When worn, the logo should be on the palm side. The O Ring should fit snugly against the skin at the base of the finger.

Does the opove app require a monthly subscription?

No, the opove app has no subscription fees and no hidden costs.

Sleep tracking, stress monitoring, heart rate tracking, women's health tracking, and all historical trend data are included from day one.

Can I wear the ring while showering?

Yes. The ring is water-resistant to 5 ATM. However, please avoid using it in water with complex compositions (such as hot springs or seawater) to prevent potential corrosion.

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