# Oura Ring 4

Manufacturer: [Oura](/companies/oura)  
Category: biometric

## Summary

The Oura Ring 4 (Gen 4, late 2024, from Oura, founded 2013 in Oulu, Finland) is a titanium biometric smart ring and the study-first archetype of the biometric cohort. Its 'Smart Sensing' recessed sensors (PPG heart rate and HRV, red and infrared blood-oxygen, multi-point skin temperature, accelerometer) feed 50-plus metrics: sleep staging and Sleep Score, Readiness, Activity, stress, cycle tracking, a VO2 Max estimate, and an LLM 'Oura Advisor'. It is sold as a purchase (from about $349) plus a required Oura Membership ($5.99/month); the AI augments genuine biometric sensing rather than being the product. DEPLOY records commercial maturity and a reported $11 billion valuation (October 2025). The verified-vs-claimed throughline: Oura is positioned as general wellness and is not FDA-cleared for diagnostics, and it ran a blood-pressure study in December 2025 before marketing blood pressure, the study-first counterpoint to Whoop's market-first BP Insights. Oura is also the patent-holder in the smart-ring litigation (RingConn settled; Ultrahuman was ITC import-banned via the '178 patent).

## Top line

> Oura Ring 4 is shipping now at $349-$499 (actual sale price), no capability claims are on file, the model has no verified field deployments in the registry, and no incidents are on record.

## Readiness

- **Availability** (shipping-now): Shipping now.
- **Price honesty** (actual-sale-price): One price on file: $349-$499 (actual sale price).
- **Capability honesty** (no-claims): No reviewed capability claims on file for Oura Ring 4.
- **Real-world use** (commercial): Maturity: commercial. No verified deployments in the registry.
- **Safety record** (no-incidents): No incidents on record. No verified deployments either.

## What it claims to do

_No reviewed capability claims on file._

## Price

- $349-$499, _actual-sale-price_ ([Oura (Ring 4)](https://ouraring.com/product/oura-ring-4)) _as of 2024-10-01_

## Real-world use

_No verified deployments on file for Oura Ring 4._

## Safety record

_No incidents on record. No verified deployments either, so the absence is uninformative._

## Privacy

_No privacy practices disclosed or on file for Oura Ring 4._

## Specs

- **notes**: [{"label":"FDA clearances (minimal - the disciplined posture)","value":"The Oura Ring 4 itself has NO FDA clearance; it is marketed as a GENERAL-WELLNESS product under FDA's general-wellness policy. Cleared-feature route is via PARTNER integrations (e.g. Natural Cycles, an FDA-cleared birth-control app, consuming Oura temperature data - the clearance belongs to Natural Cycles, not Oura)."},{"label":"Disciplined counter-case to Whoop (verified-vs-claimed)","value":"Oura launched a Blood Pressure Profile Study (Dec 2025) pursuing a hypertension feature, but it is INVESTIGATIONAL and NOT cleared - Oura is running the study/clearance path BEFORE marketing BP. This is the disciplined counter-case to Whoop's market-first posture (which drew an FDA warning letter for marketing uncleared BP)."},{"label":"CORRECTION (valuation)","value":"Valuation is $11B (Series E ~$900M, Oct 2025, Fidelity-led; revenue reportedly >$1B in 2025) - NOT the stale ~$5B+."},{"label":"Verification posture","value":"Boundary: biometric-primary + AI-augmented. Clinical posture: STRONGEST/growing on SLEEP (2025 Brigham & Women's study found Oura the most accurate consumer sleep tracker for 4-stage classification vs PSG; ~94% sleep/wake sensitivity vs PSG; 2026 meta-analysis corroborated). Posture is 'validated wellness', not 'cleared medical device' (except via partners). NOT verified: BP/hypertension feature (investigational); Readiness/VO2 Max accuracy (not clearance-validated)."}]
- **specs**: Oura Ring 4 (Gen 4, late 2024). Titanium smart ring; 'Smart Sensing' (recessed sensors, signal pathways 8->18); ~8-day battery. Sensors: PPG HR + HRV, red/IR blood-oxygen (SpO2 trends), multi-point skin temperature, accelerometer. Outputs: Sleep staging + Sleep Score, Readiness Score, Activity, stress, Cycle tracking + Natural Cycles integration, VO2 Max estimate, AI 'Oura Advisor' (LLM). 50+ metrics. Founded 2013, Oulu Finland. Purchase (~$349+) + REQUIRED Oura Membership ($5.99/mo).
- **formFactor**: biometric (biometric-primary smart ring + AI augmentation; sleep/readiness; general-wellness)

## What's under the hood

_No brain on file for Oura Ring 4._

## Frequently asked questions

### Is the Oura Ring 4 actually available for purchase?

Yes, shipping now.

_Source: [Oura raises ~$900M Series E at $11B valuation (Oct 2025; Fidelity-led)](https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html)._

### What does the Oura Ring 4 cost?

Oura Ring 4 costs $349-$499 one-time (actual sale price).

_Source: [Oura (Ring 4)](https://ouraring.com/product/oura-ring-4)._

### Where is the Oura Ring 4 being used?

No verified field deployments on record.

### Is the Oura Ring 4 safe?

No incidents on record, but with no verified field deployments either, the absence is uninformative.

### How does the Oura Ring 4 handle privacy?

No privacy practices disclosed or on file for Oura Ring 4.

### Who makes the Oura Ring 4?

Oura Ring 4 is made by Oura, based in Oulu, Finland.

_Source: [Oura raises ~$900M Series E at $11B valuation (Oct 2025; Fidelity-led)](https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html)._

## Manufacturer

- [Oura (https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html)](https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html)

## Compared to

- [Stelo](/consumer/models/stelo)
- [Withings ScanWatch](/consumer/models/withings-scanwatch)
- [Fitbit (Charge / Sense / Versa)](/consumer/models/fitbit-tracker)

## Sources

1. [Oura raises ~$900M Series E at $11B valuation (Oct 2025; Fidelity-led)](https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html)
2. [Oura Ring 4 (Gen 4, late 2024): Smart Sensing, signal pathways 8->18; sleep/readiness/temp; AI Advisor](https://ouraring.com/blog/oura-ring-4/)
3. [Oura pursuing a hypertension feature via a Blood Pressure Profile Study (Dec 2025; investigational)](https://www.medtechdive.com/news/oura-blood-pressure-fda-study/)
4. [Oura Ring sleep-staging validated PSG-comparable (Brigham & Women's study)](https://sleepreviewmag.com/sleep-diagnostics/consumer-sleep-tracking/oura-ring-4-sleep-accuracy/)
5. [Oura (Ring 4)](https://ouraring.com/product/oura-ring-4) · 2024-10-01

_Canonical: https://deploy.report/models/oura-ring-4_