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Comparison · 2 picks
Noise Luna Ring vs Oura Ring 4 (UK 2026)
The Noise Luna Ring and the Oura Ring 4 sit at opposite ends of the smart ring market. Both are capable smart rings (finger-worn health-sensor wearables), but the Oura is the polished, subscription-backed premium pick while the Luna is the budget, no-monthly-fee challenger. The right choice comes down to how much you value accuracy and polish versus avoiding a recurring bill.
At a glance
All 2 options side by side.
 Oura Ring 4 |  Noise Luna Ring | |
|---|---|---|
| Price | £349 | £219 |
| Best for | The accuracy and polish leader, if you accept the ongoing subscription cost. | Most of the experience for far less, with no monthly fee. |
| Check price | Check price |
The picks in detail
Oura Oura Ring 4
Bottom line. The accuracy and polish leader, if you accept the ongoing subscription cost.
Pros
- The most refined, PSG-validated sleep and HRV accuracy in the category
- Polished app with the best narrative insights
- Durable titanium build, 4-7 day battery
Cons
- Requires a £5.99/month membership for most features
- First-year cost is closer to £400
- No live workout heart-rate broadcast
Noise Noise Luna Ring
Bottom line. Most of the experience for far less, with no monthly fee.
Pros
- No subscription: every feature is included
- Strong sleep and heart-rate accuracy for the price
- Roughly £180 cheaper over the first year
Cons
- Only ~4-day real-world battery
- Unreliable activity tracking
- Less polished app than Oura
How much do they really cost?
This is the heart of the decision. The Noise Luna Ring is a one-off £219. The Oura Ring 4 is £349 up front plus an Oura Membership at £5.99 a month, which pushes the real first-year cost towards £400 and keeps climbing every year you own it. Over three years the gap between the two runs to several hundred pounds.
Which tracks sleep and recovery more accurately?
The Oura Ring 4 wins, and it is not especially close at the top end. Its sleep-stage and heart-rate-variability algorithms are the most validated in the category and its app turns the data into genuinely useful guidance. The Noise Luna Ring is accurate enough that most people would be happy with it, but Oura remains the reference point for serious sleep tracking.
How do battery and everyday use compare?
Roughly even on paper, with an edge to Oura in practice. The Oura Ring 4 manages four to seven days and includes a small fast-charging puck. The Noise Luna Ring lands closer to four days and its dock is fussier to seat. Neither is a battery champion in the way RingConn rings are, so if longevity between charges is your priority, look at our best smart rings guide.
Which should you buy?
Buy the Oura Ring 4 if you want the most accurate sleep data and the most polished app, and the monthly fee does not put you off. Buy the Noise Luna Ring if you want strong everyday tracking with zero recurring cost and a much lower entry price. For a no-subscription ring with better battery than either, the RingConn Gen 2 is also worth a look.