Smart Sleep Ring Tracker

Your finger has 10× denser capillary access than your wrist — making it the most accurate place to read your body's overnight story.

Why it works: PPG optical sensors fused with skin-temperature deviation tracking measure true HRV-based sleep architecture directly from your finger's capillary-rich tissue — detecting REM, deep, and light cycles with precision that wrist straps simply can't match.

What it does

• Maps your full sleep architecture. Identifies REM, deep, and light sleep stages using real HRV data, not just movement detection.
• Reads signals wrist trackers miss. Finger capillaries are 10× denser than wrist tissue, giving the optical sensors a cleaner, stronger biometric signal.
• Runs silently all night. Low-profile ring design means no screen glare, no wrist pressure, and nothing interrupting the rest you're actually trying to measure.
• Delivers a morning snapshot worth acting on. Wake up to a clear breakdown of your overnight recovery so you can make smarter decisions before your first coffee.

How to use

Slip the ring onto your preferred finger before bed — no setup rituals, no charging mid-night. It tracks continuously while you sleep and syncs your full sleep-stage report to the companion app by morning. Check your HRV trend, sleep score, and stage breakdown, then adjust your wind-down routine based on what's actually happening in your body.

What's included

• Smart Sleep Tracker Ring
• Magnetic charging dock
• Sizing kit (multiple fit options)
• Companion app access (iOS & Android)

Hale & Co backs every order with our 60-day money-back guarantee. Free U.S. shipping over $50.