Oura Ring 4 Ceramic Tide (Size 13) – Sleep, Activity & Women’s Health | Up to 8 Days Battery | Android & iOS

Discover Oura Ring 4 Ceramic Tide, a sophisticated smart ring that blends refined design with everyday durability. The zirconia ceramic exterior offers a modern, cool-toned finish that complements both workwear and casual outfits. In the Tide color, this ceramic ring adds a subtle, contemporary accent while housing advanced sensors that monitor your wellbeing around the clock.

Built on Smart Sensing, the ring continuously collects data across more than 50 metrics—sleep quality, daily activity, readiness, stress patterns, heart signals, metabolic indicators, and women’s health insights. The result is a cohesive picture of how your nights affect your days, and how your daytime choices influence your recovery. The ring adapts to your finger for consistent readings day and night, delivering insights without distraction.

Real-life benefits you might notice

• Plan workouts and daily tasks with readiness trends that reflect your current state.
• Refine your evening routines by reviewing sleep stages and nocturnal patterns.

Key features and practical care

• Long battery life: up to eight days on a single charge so you can focus on the moment without interruptions.
• Android and iOS compatibility through the Oura app for seamless syncing and insights.
• Accurate sizing matters: use the Oura Ring Sizing Kit to find your ideal fit before purchasing.

The Ceramic Polishing Pad helps keep your ring looking like new, even with everyday wear. If gray marks appear due to metal transfer, a gentle cleaning removes them—consistent care helps maintain the surface’s pristine look. For activities involving metal objects, consider removing the ring to protect both the ring and the objects involved.

Oura also offers an introductory membership when you buy: one month included for new members, with ongoing access via a modest monthly fee. The ring and accessories are HSA/FSA eligible for eligible purchases, including shipping. The Tide color is one of three ceramic finishes in the collection, designed to express your style while delivering continuous health insights in a compact form factor.