Sleeping with a heavy smartwatch strapped to your wrist is a compromise most people eventually abandon. In 2026, ultra-lightweight titanium smart rings have become the gold standard for continuous biometric tracking—capturing finger-artery photoplethysmography (PPG) signals that are cleaner and more reliable than wrist-based optical sensors.

Why Finger-Based Biometrics Are More Accurate

Unlike the top of the wrist, the palmar side of your finger sits directly over two palmar digital arteries. That proximity allows rings like the Halo Ring Pro to sample resting heart rate (RHR), nocturnal heart-rate variability (HRV), blood oxygen (SpO2), and subtle 0.05°C skin-temperature shifts without motion artefacts.

Comparing the AZDM Smart Ring Lineup

• Halo Ring Pro (R2,799): Our flagship Grade-5 PVD titanium chassis with dual-wavelength red/infrared SpO2 sensing, 7-day battery endurance, 5ATM water resistance, and an anodized charging dock.
• Orbit Ring Air (R1,999): Engineered for zero-distraction comfort at just 2.6 grams and a 2.2mm profile—ideal for athletes, lifters, and sleepers who never wear jewellery.
• Halo Ring (R1,799): The essential daily sleep, step, and readiness tracker with 6-day battery life and full iOS and Android companion app sync with zero monthly subscription fees.

No Monthly Subscription Lock-In

Every smart ring stocked by AZDM includes full access to sleep staging, readiness scores, and trend exports in the companion mobile app—with no recurring monthly subscription required and full coverage under our 12-month South African warranty.