The Kireya Smart Ring – Sleep, Heart Rate & Recovery Tracker

Everything your body is telling you, on one quiet ring.

The Kireya Smart Ring tracks your sleep, heart rate and recovery from your finger, with no bulky watch and no buzzing screen. Wear it to bed and wake up to a clear picture of how you slept and how ready you are for the day.

🎁 A gift that gets worn every day. Arrives in a gift box. Free tracked shipping. 30-day happiness promise.

No subscription. Ever. Your data lives in the free app (iOS & Android), so you pay once and keep everything.

What it tracks

Sleep: deep, light and REM stages, plus total sleep time
Heart rate & HRV: all day and all night
Blood oxygen (SpO2): overnight readings
Stress & recovery: a daily readiness snapshot
Activity: steps, distance, calories and multiple sport modes

Made to live in

Feather-light: about 2.7 g, 2.3 mm thin, so you forget it's there
5ATM waterproof: shower, swim and wash your hands without taking it off
5–7 days per charge: drop it on the magnetic dock and it's full in about 1.5 hours
Four finishes: Black, Silver, Champagne Gold and Rose Gold
Bonus: gesture control for your phone camera and a find-my-ring feature

Find your size

Measure the inside diameter of a ring that fits the finger you'll wear it on, then match it below. Between sizes? Size up. Smart rings fit best snug on the index or middle finger.