# Oura Ring 4: robot model

Canonical ID: `0d72f116-5e60-426c-80a6-afb2cf156c84`

- **Slug:** oura-ring-4
- **Form factor:** biometric
- **Maturity stage:** commercial
- **Lifecycle:** active
- **Deployments registered:** 0

## Specs

- **notes:** [object Object],[object Object],[object Object],[object Object]
- **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)

## Deployments

_No deployments registered for this model._

## Supply chain

_No verified supply relationships on file. Supply-chain coverage is being added across the registry; check back as the seed populates this model's suppliers._

_Suppliers appear when verified with at least two strong sources. Sources are append-only; corrections add new sources rather than rewrite history._

## Common questions

### What is Oura Ring 4?

Oura (Oura Health, founded 2013 in Oulu, Finland) makes the Oura Ring, a biometric-primary titanium smart ring with sleep and readiness AI, recorded in the new biometric form factor, with the Oura Ring 4 from late 2024 introducing its Smart Sensing platform that expanded signal pathways from eight to eighteen on roughly an eight-day battery. It pairs heart-rate and heart-rate-variability, blood-oxygen-trend, multi-point temperature, and accelerometer sensing with sleep staging and a Sleep Score, a Readiness Score, activity, stress, cycle tracking with Natural Cycles integration, a VO2 Max estimate, and an AI Oura Advisor across more than 50 metrics, sold by purchase plus a required membership of $5.99 a month. On FDA status, the Oura Ring 4 itself has no clearance and is marketed as a general-wellness product, with its only cleared-feature route via partner integrations such as the FDA-cleared Natural Cycles birth-control app consuming Oura temperature data, where the clearance belongs to the partner. Oura is the disciplined counter-case to Whoop in the verified-versus-claimed framework: it launched a Blood Pressure Profile Study in December 2025 to pursue a hypertension feature, but that feature is investigational and not cleared, so Oura is running the clearance path before marketing blood pressure, in contrast to Whoop's market-first posture that drew an FDA warning letter. A valuation correction is worth recording: Oura is valued at $11 billion after a roughly $900 million Series E in October 2025 led by Fidelity with revenue reportedly above $1 billion in 2025, not the stale roughly $5 billion figure. Its clinical-validation posture is the strongest and growing in the cohort specifically on sleep, with a 2025 Brigham and Women's Hospital study finding it the most accurate consumer sleep tracker for four-stage classification against polysomnography, while its posture is validated wellness rather than a cleared medical device except via partners, and its blood-pressure feature and the accuracy of its Readiness and VO2 Max metrics are investigational or not clearance-validated.

### Who makes Oura Ring 4?

Oura Ring 4 is made by Oura, based in Oulu, Finland, founded in 2013.

### Where is Oura Ring 4 deployed?

No verified deployments of Oura Ring 4 are currently on the DEPLOY registry. DEPLOY records deployments only when verified at a named site with a primary source; absence may reflect pre-deployment, research, or manufacturer-internal use.

### What is Oura Ring 4's maturity stage?

Oura Ring 4 is at the commercial stage on the DEPLOY maturity ladder (research, prototype, pilot, commercial, production). Commercial stage means production-grade deployments are operating at named customer sites.


## Sources (4)

1. https://www.cnbc.com/2025/10/14/oura-smart-ring-11-billion-valuation.html
2. https://ouraring.com/blog/oura-ring-4/
3. https://www.medtechdive.com/news/oura-blood-pressure-fda-study/
4. https://sleepreviewmag.com/sleep-diagnostics/consumer-sleep-tracking/oura-ring-4-sleep-accuracy/

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