Luna Ring Gen 2 Review: Style & Freedom

Luna Ring Gen 2 Review: A Stylish Smart Ring That Doesn’t Quite Reign Supreme

The Luna Ring Gen 2 offers a compelling blend of sleek design and robust tracking features, positioning itself as a strong contender in the burgeoning smart ring market. However, despite its attractive price point and subscription-free model, it falls slightly short of unseating the established leaders like Oura.

A Growing Market for Finger-Worn Tech

India-based Noise is aiming to capture a share of the smart ring market currently dominated by the Oura Ring 4 and the soon-to-be-released Samsung Galaxy Ring with its second-generation Luna. The Luna Ring Gen 2 distinguishes itself by incorporating artificial intelligence to provide personalized insights into workouts and nutrition. As the number of connected rings increases, the question remains: does the Luna Ring Gen 2 offer enough to stand out from the crowd?

Design and Build Quality: Aesthetically Pleasing, But Prone to Scratches

The Luna Ring Gen 2 boasts a design similar to many other smart rings, primarily constructed from titanium with a hypoallergenic molding on the interior, housing the essential sensor bump. While the sensor isn’t uncomfortable, it is noticeable.

Five color options are available – Stardust Silver, Lunar Black, Sunlit Gold, Midnight Black, and Rose Gold. The Sunlight Gold model, tested for this review, unfortunately showed minor scratches during the evaluation period. The titanium’s ripple effect does offer a distinctive aesthetic. A free sizing kit is available for those unsure of their ring size, and adhering to standard smart ring sizing proved accurate.

Charging options include a portable charging case or a more affordable dock. The ring is also waterproof up to 50 meters, surviving showers, pool swims, and heavy rain without issue.

Fitness and Tracking: Solid Performance, With a Caveat

The Luna Ring Gen 2 tracks steps, sleep, heart rate, and stress levels, utilizing a free companion app for both iOS and Android. The app’s interface is stylish and well-organized, presenting data on daily totals, sleep patterns, readiness scores, activity tracking, and the Luna AI features.

Sleep tracking data closely mirrored results from the Oura Ring 4, accurately measuring sleep duration, sleep stages (deep and REM), and restorative sleep. The “Readiness” metric, incorporating heart rate, respiratory rate, and temperature, also yielded comparable results to the Oura Ring 4. However, one analyst noted that heart rate readings tended to be slightly elevated, suggesting this isn’t the most precise option for heart rate monitoring.

Activity tracking provides daily step counts, distance, and calorie burn, aligning with data from other fitness trackers. Automatic workout recognition proved reliable for runners and walkers.

Luna AI: Potential Untapped

Luna AI serves as a hub for understanding the ring’s tracked metrics and generating workout and diet plans. However, according to a company release, the AI’s recommendations currently feel akin to ChatGPT’s output – not particularly personalized or compelling.

Battery Life and Charging: Middling Performance

The Luna Ring Gen 2 delivers approximately 5-6 days of battery life on a single charge, meeting Noise’s stated claims. However, this falls short of the battery life offered by competitors like the Oura Ring 4, Samsung Galaxy Ring, and RingConn Gen 2. The portable ‘Surge Charge’ case provides an additional 30 days of power and takes roughly two hours to fully recharge.

Price and Availability: A Competitive Edge

Launched in July 2025, the Luna Ring Gen 2 starts at $300 (£269), undercutting the Oura Ring 4’s starting price of $349 (£349). The standard package includes a charging dock, while the portable charging case adds an extra $29 (£30). Currently, the Luna Ring Gen 2 is not available for purchase in the USA.

Notably, unlike Oura, the Luna Ring Gen 2 doesn’t require a subscription fee, aligning it with the Samsung Galaxy Ring ($399.99), Ultrahuman Ring Air ($349), Circular Ring 2 (from $349), and RingConn Gen 2 ($299) as hardware-only purchases.

Should You Buy the Luna Ring Gen 2?

There’s a lot to appreciate about the Luna Ring Gen 2. Its design is appealing, the app is user-friendly, and the tracking is generally solid. However, the less-than-accurate heart rate tracking and middling battery life hold it back from truly competing with the best. If sleep tracking and data context are priorities, the Luna Ring Gen 2 delivers a good experience.

A senior official stated that pricing the Luna Ring Gen 2 below the competition was a strategic move, acknowledging that it doesn’t quite outperform the category leaders in all areas. Ultimately, the Luna Ring Gen 2 is a strong contender, but not yet a champion.

Specs:

• Up to 5 days battery life
• Optional portable charging case
• Works with Android and iOS
• Subscription-free
• Weighs 3-5g (depending on size)
• Waterproof up to 50 metres
• Optical heart rate sensor
• Optical blood oxygen sensor
• Skin temperature sensor