# Oura Ring 4 Launch: Specifications, Cost, and Health Features
Oura has formally introduced its latest wearable device, the **Oura Ring 4**, which offers a suite of new enhancements and features. The Oura Ring has consistently been popular among health-focused users, and this fourth version aims to improve the overall user experience with superior health tracking, an upgraded design, and an expanded selection of sizes.
## The All-Titanium Build
The **Oura Ring 4** maintains the brand’s commitment to utilizing **titanium** in its design, this time incorporating the material on the interior of the ring as well. This adjustment not only strengthens the ring’s longevity but also boosts comfort levels. Among the standout design enhancements are the **recessed sensors**, which substitute the elevated dome sensors seen in earlier iterations. This modification is anticipated to enhance the ring’s fit and comfort, ensuring it is ideal for extended wear, while simultaneously improving health data accuracy.
The ring comes in **six color variants**: silver, black, brushed silver, stealth, gold, and rose gold. Oura has also broadened the size options, now providing sizes from **4 to 15**, as opposed to the previous range of 6 to 13. This expansion caters to the increasing popularity of the Oura Ring among women, although the new sizes are designed for all users.
Despite these design modifications, the Oura Ring 4 remains lightweight, weighing between **3.3g and 5.2g**, depending on the size. The larger sizes enjoy enhanced battery longevity, with the ring operating for up to **8 days on a single charge**, thanks to the innovative **Smart Sensing** algorithm.
## Oura Ring 4’s Smart Sensing Technology
A standout enhancement in the Oura Ring 4 is the launch of **Smart Sensing technology**. This new algorithm enhances the precision of health data acquisition by adjusting to different finger anatomies. It considers variables such as **skin tone, age, and BMI** during readings, thereby ensuring more accurate measurements.
The sensors within the Oura Ring 4 are arranged **asymmetrically**, providing varying distances and penetration depths in tissue for assessments. The ring boasts an **18-path multi-wavelength photoplethysmography (PPG) subsystem**, a marked upgrade from the 8-path PPG system found in the Oura Ring 3.
The Oura Ring 4 monitors a diverse range of health indicators, including:
– **Heart rate**
– **Heart rate variability**
– **Sleep stages**
– **Blood oxygen levels**
– **VO2 Max**
– **Stress levels**
Moreover, the ring features **cycle tracking** capabilities and aids in predicting fertility windows. It also recognizes over **40 distinct types of fitness activities**, making it a multifunctional device for health monitoring and exercise tracking.
Oura conducted a sleep study comparing the Ring 4 with the Ring 3 and noted several advancements in the newer version. The Oura Ring 4 exhibits **30% greater accuracy** in measuring overnight blood oxygen levels, **15% increased accuracy** in breathing disturbance index (BDI) readings, and displays **31% fewer gaps** in the nighttime heart rate graph. Daytime heart rate readings also show **7% fewer gaps**.
## The New Oura App
In tandem with the hardware upgrades, Oura has revamped its mobile application to enhance navigation and health data management. The refreshed app showcases a streamlined interface with **three primary tabs**: **Today**, **Vitals**, and **My Health**, superseding the former five-tab layout.
– The **Today** tab offers a concise snapshot of daily health data, including Sleep, Readiness, Activity Scores, heart rate, and more. It also has a timeline feature to track daily activities and a “discoveries” section for supplementary insights.
– The **Vitals** tab provides a thorough exploration of health metrics, complete with baseline ranges and detailed insights for each indicator.
– The **My Health** tab concentrates on long-term health patterns, enabling users to monitor progress over time with weekly, quarterly, and annual reports that can be shared with healthcare professionals if desired.
## Cost and Availability
The **Oura Ring 4** is currently available for **preorder**, with an official release set for **October 15th, 2024**. The price for the updated model has risen by **$50**, making it **$349** in total. New customers will need to order a **sizing kit** to secure an accurate fit, and even those migrating from previous versions are advised to obtain a new sizing kit due to the design alterations.
## Oura Membership
The Oura membership, which provides access to enhanced features, remains priced at **$5.99**.
