Today Circular unveils Kira, the world's first personalized AI health coach embedded in a smart ring.

Wearables have always been good at collecting data. But data without interpretation is just numbers. Kira changes that. It analyzes your sleep, activity, heart rate variability, body temperature, respiratory rate, and SpO2 trends, then delivers personalized recommendations in plain language.

How it works. Kira processes your health data daily and surfaces insights in the Circular app. It notices when your resting heart rate is trending higher than your baseline and suggests a recovery day. It detects when your deep sleep has been declining for three consecutive nights and recommends adjusting your bedtime. It learns your patterns over time, becoming more accurate and more personalized with every week of use.

Why this matters. Until today, AI health coaching was only available through expensive apps with monthly subscriptions, or built into premium sports watches. Kira brings the same level of intelligence to a 2-gram ring, with no subscription required. It is the lightest, most invisible AI health coach in the world.

Kira will be rolling out to all Circular Ring users starting today.