Orbit Sleep Ring

Titanium, 4 grams, and completely invisible as a piece of technology. Seven days between charges. No subscription — the app is free and stays free.

Reads heart rate variability, blood oxygen and skin temperature from the palmar arteries, which are closer to the surface than those in the wrist. This is why rings outperform watches for sleep data.

• Grade 5 titanium, 2.6mm thick, 4g
• 7-day battery, 80-minute full charge
• HRV, resting HR, SpO₂, skin temperature
• Sleep staging + readiness score
• 100m water resistant
• No subscription, ever
• Sizing kit shipped free before your order dispatches