# Circular Ring 2 vs Luna Ring Gen 2: specs and price compared

A sourced, side-by-side comparison of the Circular Ring 2 (Circular) and Luna Ring Gen 2 (Noise) among smart rings. Luna Ring Gen 2 is the cheaper of the two at $300.

## Side by side

| Spec | Circular Ring 2 | Luna Ring Gen 2 |
| --- | --- | --- |
| US price | $379 | $300 |
| Brand | Circular | Noise |
| Released | 2025-08 | 2025-07 |
| Material | Titanium (PVD coating on premium finishes) | Fighter jet-grade titanium with PVD coating and non-allergenic inner molding |
| Weight (g) | 3 | 3-5 |
| Battery days | 8 | 6 |
| Spo2 | Yes | Yes |
| Temperature sensor | Yes | Yes |
| Ecg | Yes | No |
| Subscription required | No | No |
| Water resistance (m) | — | 50 |

## Key differences

- Material: Circular Ring 2 Titanium (PVD coating on premium finishes) vs Luna Ring Gen 2 Fighter jet-grade titanium with PVD coating and non-allergenic inner molding
- Weight (g): Circular Ring 2 3 vs Luna Ring Gen 2 3-5
- Battery days: Circular Ring 2 8 vs Luna Ring Gen 2 6
- Ecg: Circular Ring 2 Yes vs Luna Ring Gen 2 No

## Sources

- Circular Ring 2: https://shop.circular.xyz/products/circular-ring-2 (shop.circular.xyz, verified 2026-06-15)
- Luna Ring Gen 2: https://www.lunazone.com/products/luna-smart-ring-gen-2 (lunazone.com, verified 2026-06-15)

Canonical: https://frontdeskreview.com/gear/smart-rings/circular-ring-2-vs-luna-ring-gen-2/
Cite: Per The Front Desk Review, Circular Ring 2 ($379) vs Luna Ring Gen 2 ($300) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/smart-rings/circular-ring-2-vs-luna-ring-gen-2/
License: CC BY 4.0.