Noise Luna Ring
The Noise Luna Ring is a 3.5 g, subscription-free smart ring with strong sleep and heart accuracy. Its weak spot is battery: about four real-world days.
3.5 / 5
★★★★★ ★★★★★ Recommended with caveats
Strengths
- No subscription: all metrics included with the hardware
- Strong sleep-stage and heart-rate accuracy in independent testing
- Light 3.5 g titanium build with diamond-like coating
Watch outs
- Real-world battery is only about four days, well behind rivals
- Magnetic charger needs fiddly, precise alignment
- Activity and workout tracking is unreliable
£219
Typical price - check Amazon for live pricing.
- Weight 3.5 g
- Material Titanium with diamond-like carbon (DLC) coating
- Battery life Claimed 5-6 days; ~4 days real-world
- Charge time 90-120 minutes (flat magnetic dock, no case)
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By Editorial team1 min read
- Weight
- 3.5 g
- Material
- Titanium with diamond-like carbon (DLC) coating
- Battery life
- Claimed 5-6 days; ~4 days real-world
- Charge time
- 90-120 minutes (flat magnetic dock, no case)
- Water resistance
- 5 ATM (~50 m)
- Sizes
- 7 sizes, 5 finishes (sizing kit required first)
- Sensors
- PPG heart rate, HRV, SpO2, skin temperature, respiratory rate, accelerometer
- Tracking
- Sleep stages, readiness/recovery, stress, menstrual health, activity
- Extras
- Luna AI assistant, Find my Ring
- Subscription
- None - all features included
- UK price
- ~£219 (Amazon.co.uk)
- Availability note
- Pulled from US sale after Oura v Nexxbase (Nov 2025); remains on sale in the UK
- Pricing as of
- June 2026