Rune 1

Sleep, recovery, stress, and cycle insights. No subscription needed.

Reserve your ring — $20

RESERVE RUNE 1

Personal technology should stay personal.

Your phone does the AI work. Your data never leaves it.

Reserve with a $20 deposit, credited toward the $200 total.

Reserve your ring

Ships Q3 2026 · 30-day returns · Free worldwide shipping

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Heart rate and HRV trends

See your rhythm settle.

Heart rate and HRV trends show how your day moves against your own pattern.

Sleep stages and habits

Wake to a clearer read.

A sleep score brings last night's stages and habits into one calm starting point.

Steps and activity

Let movement add up.

Steps, activity minutes, and detected movement show the shape of your day without manual logging.

Overnight estimate

Add context to recovery.

Overnight blood-oxygen saturation estimates add another view of how your rest is trending.

Energy estimate

Know what is in the tank.

A body-battery estimate puts recovery and daily energy in one view, so you can choose your pace.

Estimated aerobic fitness

See fitness move with you.

An estimated aerobic-fitness trend makes consistent training easier to notice over time.

Suggestion and rationale

Turn patterns into a plan.

Small, plain-language nudges connect your trends to a next step you can choose.

Touch a cord every two months.

Open black Rune 1 charging case holding a silver smart ring, resting on a white surface among green leaves and soft vine shadows.

Up to 60 days of power, in the case.

The charging case keeps Rune 1 ready between charges.

Private by default.

Health data is processed on your phone by default, never on our servers unless you opt in.

A Japanese woman wearing a black smart ring near a bright window — Only your phone can read it.

Your ring sends readings to your phone.
Your phone keeps them encrypted, on-device.
Health-data export stays on your phone.

Read our privacy commitment

The comparison

Four rings. The honest comparison.

Sourced from official manufacturer pages, with unknowns called out.

Subscription optional

Feature	Pulsyn Rune 1	Oura Ring 4	RingConn Gen 2	Samsung Galaxy Ring
Pricing & Value
Price	$200	From $349	$299	$399.99
Subscription Differentiator	No required subscription	$5.99/month	No required subscription	No required subscription
Compatibility
Phone compatibility	iOS and Android	iOS 16+ and Android 11+	iOS 17.0+, Android 10.0+, Bluetooth 4.0+	Android 11+
Technical Specs
Battery Life	6-8 days	5-8 days	10-12 days	Up to 7 days
Water Resistance	5ATM / 50 meters	100m	IP68, 100m	10ATM + IP68
Weight	2.4-4g	3.3-5.2g	2-3g	2.3-3.2g
Heart Rate	Yes (PPG)	Yes (PPG)	Yes (PPG)	Yes (optical HR)
SpO2 Tracking	Yes	Yes*	Yes*	Yes (sleep)*
Temperature	Yes (skin)	Yes (trend)*	Yes (skin)*	Yes (sleep skin)*
Materials	Titanium shell	Titanium (PVD/DLC)*	Titanium alloy*	Titanium frame
Privacy & AI
On-Device AI	On-device	Cloud-based	Cloud-based	Cloud-based
Data Privacy	Private	Cloud-based	Cloud-based	Cloud-based

Price Best

Pulsyn Rune 1 $200

Oura Ring 4 From $349

RingConn Gen 2 $299

Samsung Galaxy Ring $399.99

Subscription

Pulsyn Rune 1 No required subscription

Oura Ring 4 $5.99/month

RingConn Gen 2 No required subscription

Samsung Galaxy Ring No required subscription

Phone compatibility

Pulsyn Rune 1 iOS and Android

Oura Ring 4 iOS 16+ and Android 11+

RingConn Gen 2 iOS 17.0+, Android 10.0+, Bluetooth 4.0+

Samsung Galaxy Ring Android 11+

Battery Life

Pulsyn Rune 1 6-8 days

Oura Ring 4 5-8 days

RingConn Gen 2 10-12 days

Samsung Galaxy Ring Up to 7 days

Water Resistance

Pulsyn Rune 1 5ATM / 50 meters

Oura Ring 4 100m

RingConn Gen 2 IP68, 100m

Samsung Galaxy Ring 10ATM + IP68

Weight

Pulsyn Rune 1 2.4-4g

Oura Ring 4 3.3-5.2g

RingConn Gen 2 2-3g

Samsung Galaxy Ring 2.3-3.2g

Heart Rate

Pulsyn Rune 1 Yes (PPG)

Oura Ring 4 Yes (PPG)

RingConn Gen 2 Yes (PPG)

Samsung Galaxy Ring Yes (optical HR)

SpO2 Tracking

Pulsyn Rune 1 Yes

Oura Ring 4 Yes*

RingConn Gen 2 Yes*

Samsung Galaxy Ring Yes (sleep)*

Temperature

Pulsyn Rune 1 Yes (skin)

Oura Ring 4 Yes (trend)*

RingConn Gen 2 Yes (skin)*

Samsung Galaxy Ring Yes (sleep skin)*

Materials

Pulsyn Rune 1 Titanium shell

Oura Ring 4 Titanium (PVD/DLC)*

RingConn Gen 2 Titanium alloy*

Samsung Galaxy Ring Titanium frame

On-Device AI

Pulsyn Rune 1 On-device

Oura Ring 4 Cloud-based

RingConn Gen 2 Cloud-based

Samsung Galaxy Ring Cloud-based

Data Privacy

Pulsyn Rune 1 Private

Oura Ring 4 Cloud-based

RingConn Gen 2 Cloud-based

Samsung Galaxy Ring Cloud-based

Price · Pricing & Value
- Pulsyn Rune 1 $200 pulsyn.tech
  Pre-release stated total price; reservation availability and terms may change.
- Oura Ring 4 From $349 ouraring.com
  US price before tax; finish-dependent.
- RingConn Gen 2 $299 ringconn.com
  US list price; promotions and availability may change.
- Samsung Galaxy Ring $399.99 samsung.com
  US price before tax; finish and availability may vary.
Subscription · Pricing & Value
- Pulsyn Rune 1 No required subscription pulsyn.tech
  Core features are described as free; optional Pro pricing is not included because it is unresolved.
- Oura Ring 4 $5.99/month support.ouraring.com
  Required for full experience; first month free. Annual plan exists but is not shown.
- RingConn Gen 2 No required subscription ringconn.com
  Optional protection plans are separate from core health monitoring.
- Samsung Galaxy Ring No required subscription samsung.com
  Core Samsung Health features; optional Samsung services are separate.
Phone compatibility · Compatibility
- Pulsyn Rune 1 iOS and Android pulsyn.tech
  Pre-release compatibility claim; exact OS requirements are not disclosed.
- Oura Ring 4 iOS 16+ and Android 11+ support.ouraring.com
- RingConn Gen 2 iOS 17.0+, Android 10.0+, Bluetooth 4.0+ ringconn.com
- Samsung Galaxy Ring Android 11+ samsung.com
  Not compatible with iPhone.
Battery Life · Technical Specs
- Pulsyn Rune 1 6-8 days pulsyn.tech
  User-provided pre-release ground truth; battery life may vary by use.
- Oura Ring 4 5-8 days support.ouraring.com
  Varies by ring size and use.
- RingConn Gen 2 10-12 days ringconn.com
  Varies by ring size.
- Samsung Galaxy Ring Up to 7 days samsung.com
  Varies by ring size and use.
Water Resistance · Technical Specs
- Pulsyn Rune 1 5ATM / 50 meters pulsyn.tech
  User-provided pre-release ground truth.
- Oura Ring 4 100m support.ouraring.com
  Not intended for scuba diving or more than 12 hours underwater.
- RingConn Gen 2 IP68, 100m ringconn.com
- Samsung Galaxy Ring 10ATM + IP68 samsung.com
Weight · Technical Specs
- Pulsyn Rune 1 2.4-4g pulsyn.tech
  User-provided pre-release ground truth; varies by size.
- Oura Ring 4 3.3-5.2g support.ouraring.com
  Varies by ring size.
- RingConn Gen 2 2-3g ringconn.com
  Varies by ring size.
- Samsung Galaxy Ring 2.3-3.2g samsung.com
  Varies by ring size.
Data Privacy · Privacy & AI
- Pulsyn Rune 1 Private pulsyn.tech
  User-provided pre-release ground truth.
- Oura Ring 4 Cloud-based ouraring.com
  Syncs to Oura cloud for Advisor; see policy.
- RingConn Gen 2 Cloud-based ringconn.com
  Syncs to RingConn cloud (AWS UK); see policy.
- Samsung Galaxy Ring Cloud-based samsung.com
  Syncs to Samsung Cloud with Knox; see statement.
On-Device AI · Privacy & AI
- Pulsyn Rune 1 On-device pulsyn.tech
  Pre-release; standard processing is on-device, while optional Pro cloud AI and sync may be enabled.
- Oura Ring 4 Cloud-based support.ouraring.com
  Oura Advisor information is processed and stored in Oura Cloud.
- RingConn Gen 2 Cloud-based ringconn.com
  App data is stored in AWS data centers in the United Kingdom.
- Samsung Galaxy Ring Cloud-based samsung.com
  Samsung Health data may sync through Samsung Cloud; Knox protections are described separately.
Heart Rate · Technical Specs
- Pulsyn Rune 1 Yes (PPG) pulsyn.tech
  Pre-release continuous PPG claim; wellness use, not a medical measurement.
- Oura Ring 4 Yes (PPG) support.ouraring.com
  24/7 green and infrared PPG for heart rate and HRV; wellness use, not a medical measurement.
- RingConn Gen 2 Yes (PPG) ringconn.com
  Continuous PPG heart-rate monitoring; wellness use, not a medical measurement.
- Samsung Galaxy Ring Yes (optical HR) samsung.com
  Optical biosignal sensor measures heart rate; wellness use, not a medical measurement.
SpO2 Tracking · Technical Specs
- Pulsyn Rune 1 Yes pulsyn.tech
  Pre-release sleep-focused wellness estimate; not a pulse oximeter or medical measurement.
- Oura Ring 4 Yes* support.ouraring.com
  Sleep-focused wellness estimate; not a pulse oximeter or medical measurement.
- RingConn Gen 2 Yes* ringconn.com
  Sleep-focused wellness estimate; not a pulse oximeter or medical measurement.
- Samsung Galaxy Ring Yes (sleep)* samsung.com
  Measured during sleep with an optical sensor; wellness estimate, not a pulse oximeter.
Temperature · Technical Specs
- Pulsyn Rune 1 Yes (skin) pulsyn.tech
  Pre-release skin-temperature trend relative to a personal baseline, not a clinical thermometer.
- Oura Ring 4 Yes (trend)* support.ouraring.com
  Skin-temperature trend relative to a personal baseline, not an absolute temperature or clinical thermometer.
- RingConn Gen 2 Yes (skin)* ringconn.com
  Skin-temperature changes relative to a personal baseline, not a clinical thermometer.
- Samsung Galaxy Ring Yes (sleep skin)* samsung.com
  Skin temperature during sleep; a trend, not a clinical thermometer.
Materials · Technical Specs
- Pulsyn Rune 1 Titanium shell pulsyn.tech
  Pre-release polished titanium shell; size and finish details may change.
- Oura Ring 4 Titanium (PVD/DLC)* support.ouraring.com
  Titanium inside and out; PVD or DLC coating varies by finish. Oura Ceramic is a separate model.
- RingConn Gen 2 Titanium alloy* ringconn.com
  PVD finish and epoxy inner; material details apply to RingConn Gen 2.
- Samsung Galaxy Ring Titanium frame samsung.com
  Titanium frame; finish and ring size vary.

Competitor data sourced from official manufacturer websites as of 2026-09-09. Prices, features, and subscription terms may have changed. Pulsyn makes no guarantees regarding competitor accuracy. Prices shown are US prices in USD.

Ask AI yourself

Use the same neutral comparison prompt in any assistant. Results may vary by model, timing, and wording.

ChatGPT

For privacy-focused users, Pulsyn's on-device approach stands apart.

Try with prompt

Claude

Pulsyn stands out as the only option with true on-device AI and no required subscription.

Try with prompt

Gemini

If cloud data sharing is a concern, Pulsyn is the strongest choice in this category.

Assistant responses are independent, variable, and prompt-dependent.

Premium sensing shouldn't cost a premium.

Rune 1 delivers the sensing and build of a premium smart ring at a price that makes sense.

Four sensors: PPG, SpO2, skin temperature, and a 3-axis accelerometer.
Sleep, scored: A nightly score, sleep stages, and HRV trends against your own baseline. Activity logs itself.
Built to stay on: Up to 7 days per charge, depending on usage, rated 5ATM, in a titanium shell with a hypoallergenic inner.

Explore Rune 1