$0 subscription, ever 7–10 day battery 1-year warranty 15-night trial

Voltery Spark - Smart Ring

Voltery Smart Ring X1

★★★★☆ 4.2 · All reviews

$199 $249Save $50

A comfortable, accurate fit helps your Voltery Smart Ring X1 deliver consistent health and activity readings. Choose the sizing option that works for you.

Finish - Gunmetal

SizeHow sizing works →

Your Voltery X2 should feel secure and comfortable without being overly tight. The ring should remain in contact with your skin throughout the night without rotating freely.

Select your US ring size:

Sizing Kit Ships with a free sizing kit & cleaning cloth. FREE

SLEEP & RECOVERY

Wake up with a clearer picture of your rest.

Track your sleep duration, sleep stages, and overnight recovery to better understand how your body recharges - and how ready you are for the day ahead.

HEART & STRESS

Your heart, understood around the clock.

Voltery X1 tracks heart rate and HRV throughout the day and night, turning continuous readings into simple insights about recovery, stress, and everyday wellness.

BLOOD OXYGEN

Overnight SpO₂ insights, while you sleep.

Monitor blood oxygen trends during the night alongside your sleep and recovery data, giving you a more complete view of how your body responds while at rest.

DAILY ACTIVITY

Every move adds up.

From everyday steps to active minutes and estimated calories burned, X1 keeps track of your daily movement without requiring a screen on your wrist.

Specification - Voltery Smart Ring X1

MaterialLightweight titanium, three finishes

Battery lifeUp to 7 days

ChargingMagnetic charging case, included

Water resistance5 ATM

Sizes availableUS sizes 7-12

SensorsPPG heart rate, SpO₂, skin temperature, accelerometer

Heart TrackingHeart rate, HRV, sleep, stress, blood oxygen & recovery

Activity TrackingSteps, active time, distance & estimated calories

Sleep TrackingSleep duration, deep, light & REM sleep stages

ConnectivityBluetooth 5.3, Voltery app (iOS & Android)

SubscriptionNone - core app insights included

How Pulse compares.

Placeholder competitor columns - swap in real brands once the final spec sheet is locked.

Feature	Voltery	Brand A	Brand B	Brand C
No subscription, ever	✓	✓	-	-
7–10 day battery life	✓	-	✓	-
Free sizing kit	✓	✓	✓	-
Titanium shell, 3 finishes	✓	-	-	✓
Lifetime warranty option	✓	-	-	-

What early wearers are saying

4.2★★★★☆ Reviews

★★★★★

"I barely notice it on my finger, but I check the health insights every morning. The sleep and recovery tracking has quickly become part of my routine."

Daniel M. - Verified buyer

★★★★

"I wanted health tracking without wearing a smartwatch all day. Voltery X1 gives me the information I need while looking and feeling like a normal ring."

Ashley R. - Verified buyer

★★★★★

"The battery life and comfortable fit impressed me most. I wear it through workouts and overnight, and having my activity and sleep data together is really convenient."

Priya K. - Verified buyer

Questions, answered.

What does the Voltery Smart Ring X1 track? +

Voltery X1 tracks key wellness signals including heart rate, HRV, sleep, blood oxygen trends, daily activity, and recovery - giving you a simple view of how your body is doing throughout the day and night.

Do I need a subscription?+

No. Core Voltery X1 tracking and app insights are included with your ring, with no monthly subscription required.

How do I choose the right ring size? +

If you’re unsure of your size, choose the sizing-kit option when ordering. Try the sample sizes, find the most comfortable fit, confirm your size, and your Voltery X1 will be prepared in the selected size.

Can I wear Voltery X1 while sleeping? +

Yes. X1 is designed for comfortable overnight wear so it can track sleep duration, sleep stages, resting heart rate, HRV, and overnight recovery.

Can I shower or swim with the ring? +

Voltery X1 is designed with 5 ATM water resistance, making it suitable for everyday water exposure, showers, swimming, and workouts.