ULTRAHUMAN Ring AIR - Space Silver - Size 10 - Smart Ring | No Monthly Subscription | Size First with Sizing Kit | Sleep Tracking Wearable - Heart Rate - Fitness Tracker

YOUR ALL-IN-ONE SMART RING — 100+ HEALTH METRICS, NO APP FEE: Monitor heart rate, HRV, blood oxygen (SpO2), skin temperature, stress, and recovery from a single 2.4g titanium ring — the lightest smart ring available. Every core feature is free in the Ultrahuman app. No hidden fees. Compatible with iOS and Android.

ADVANCED SLEEP & RECOVERY TRACKER: Detailed insights into every sleep stage — REM, Deep, Light, Wakefulness. Track accumulated sleep debt and skin temperature trends. Smart Alarm wakes you at your lightest phase. Daily recovery score with actionable nudges. Clinically validated sensors.

SMART RING FOR WOMEN — CYCLE, FERTILITY & PREGNANCY: Track ovulation, menstrual cycles, and pregnancy with biomarker precision — not calendar estimates. Predict a 7-day fertile window across all 4 phases. Free Cycle & Ovulation tracking; Pregnancy Insights included. Discreet ring design that looks like jewellery.

POWERPLUGS — THE WORLD'S FIRST SMART RING ECOSYSTEM: Free tools: Vitamin D tracking (essential for Canadian winters), Caffeine Window, Circadian Alignment, Shift Work support, New Parent mode, Screentime management. Premium add-on: AFib Detection with nightly medical-grade heart rhythm reports.

SPACE-GRADE TITANIUM, 6-DAY BATTERY, WATERPROOF 100M: Hypoallergenic, scratch-resistant titanium with wireless charging case included. Wear it swimming, skiing, or in the rain. Buy the Sizing Kit first: Ultrahuman sizes differ from standard rings. Available in 10 sizes (5–14) and multiple colours.

Ultrahuman Ring AIR is the most comprehensive smart ring health tracker available — a health tracker, sleep tracker, fitness tracker, and stress monitor in one lightweight titanium band with no app fee for core features. This smart ring tracks 100+ metrics from your fingertip with research-grade accuracy. The built-in heart rate monitor captures HR, HRV, blood oxygen (SpO2), and skin temperature continuously, delivering a recovery score each morning. As a sleep tracker ring, it analyses REM, Deep, Light Sleep, and Wakefulness stages with actionable nudges to improve rest quality. Smart Alarm wakes you at your lightest sleep phase. The Ring AIR is a powerful fitness tracker ring, step tracker, and activity tracker — monitoring steps, calories, and METs across 20+ workout modes. The Movement Index encourages daily activity for better cardiovascular health. What makes Ultrahuman unique is PowerPlugs — the world's first modular plug-in ecosystem on a smart ring. Free PowerPlugs include Vitamin D tracking (ideal for Canadian winters), Caffeine Window for optimal energy timing, Circadian Alignment, Social Jetlag monitoring, Shift Work support, and New Parent mode. Designed as a smart ring for women and a smart ring for men. Women's Health features include free ovulation tracking, menstrual cycle prediction, pregnancy monitoring, and a 7-day fertile window — using real biomarkers, not calendar estimates. Forged from space-grade titanium at just 2.4g — the lightest smart ring available. Waterproof to 100m for swimming, skiing, and everyday Canadian adventures. Compatible with iOS and Android. Available in 15+ languages including French. Buy the Sizing Kit first — Ultrahuman Ring sizes differ from standard sizes. Available in 10 sizes (5–14) and six colours.