Luna Ring Gen 2: The Ultimate Stylish and Subscription-Free Experience

Price When Reviewed

From $269

Best Prices Today: Luna Ring Gen 2

The Luna Ring Gen 2 is another subscription-free smart ring that wants to eat into the sales of the Oura Ring 4 and Samsung Galaxy Ring.

India-based Noise’s second-generation Luna turns to AI in an attempt to stand out from the growing number of connected rings. It uses machine learning to offer advice on workouts and help you make better nutrition decisions.

While the number of smart rings available is still relatively small, there are already some strong subscription-free options out there. Does the Luna Ring Gen 2 make a strong enough case to be another one you should put on your finger?

Here’s how things played out when I slipped on the Luna Ring Gen 2.

Design & Build

• Available in five colour finishes
• Comes with portable charging case or a dock
• Waterproof up to 50 metres

The Luna Ring Gen 2 has similar design traits to many other smart rings. It’s made mainly from titanium, with a non-allergenic moulding on the inside where you’ll find the all-important sensor bump.

The sensor array, while not uncomfortable, did sit snug on the underside of my finger.

Mike Sawh

There are five colour options to choose from – Stardust Silver, Lunar Black, Sunlit Gold, Midnight Black, and Rose Gold. The version I tested is the Sunlight Gold model, which has picked up a few little scratches during testing. The ripple effect on the titanium helps to give it a distinctive look to help set it apart from other smart rings.

If you’re unsure of fit, there’s a free sizing kit available. I’ve found sticking to the same size as other smart rings has got me a good fit overall.

Mike Sawh

How you choose to charge the Luna Ring will impact how much you pay for the ring overall. The pricier option is to grab it with the pretty portable charging case (pictured). You can also opt for the dock charger to save some money (detailed pricing is below).

If you want to take it for a swim, the 5ATM rated design means it can survive submerged in water up to 50 metres depth. I’ve worn it in the shower, in the pool, and even in heavy downpours, and the Luna has survived all of those scenarios.

Fitness & Tracking

• Tracks step, sleep, heart rate, and stress
• Free Luna app available for iOS and Android
• LifeOS insights and guidance

There are some standard smart ring sensors in play here that handle monitoring your data. These include continuous heart rate monitoring, daily step counts, blood oxygen levels, and skin temperature. Movement tracking is covered by a 3-axis accelerometer.

Data is stored in the Luna app, which features a stylish interface displaying daily totals, sleep patterns, activity tracking, and Luna AI insights.

For sleep tracking, the Luna Ring Gen 2 provides detailed information on sleep duration, sleep stages, restorative sleep, and sleep goals. Readiness scores based on metrics like heart rate and temperature help users gauge their overall readiness. The app presents this data in a user-friendly manner for easy interpretation.

Activity tracking includes step counts, distance covered, calories burned, and overall activity score. Manual and automatic workout tracking options cater to different exercise preferences.

The Luna AI feature offers users insights on tracked metrics, workout plans, and diet recommendations. However, the personalized touch of this feature may need improvement to enhance user engagement.

Battery Life & Charging

• Up to 5 days battery life
• Charging case offers 30 days battery
• Fully charges in 120 minutes

The Luna Ring typically lasts 5-6 days on a single charge, meeting the manufacturer’s battery life claims. Notifications alert users when the battery is running low to avoid disruptions.

The portable ‘Surge Charge’ case boasts a 500mAh capacity battery, providing up to 30 days of additional power. Charging the ring from 0-100% takes approximately 120 minutes, offering a competitive charging rate.

Price & Availability

The Luna Ring Gen 2 was launched in July 2025, starting at £269/$300. This pricing positions it below competitors like the Oura Ring 4, making it an attractive option for budget-conscious consumers. Users can choose between the standard charging dock or the portable charging case for added convenience.

While the Luna Ring Gen 2 is not officially available in the USA, it offers a subscription-free model similar to other popular smart rings on the market. This aligns it with competitors like the Samsung Galaxy Ring, Ultrahuman Ring Air, Circular Ring 2, and RingConn Gen 2, focusing solely on hardware costs without additional monthly fees.

For a comprehensive list of the best smart rings available, check out our recommendations.

Mike Sawh

Should you buy the Luna Ring Gen 2?

The Luna Ring Gen 2 offers an appealing design, a sleek companion app, and robust tracking capabilities. However, it falls short in heart rate accuracy and battery life compared to top competitors. Despite these drawbacks, its focus on sleep tracking and data contextualization makes it a viable option for users seeking comprehensive insights.

Priced competitively below leading smart rings, the Luna Ring Gen 2 presents a compelling choice for those prioritizing features like sleep tracking and data interpretation. While it may not outshine the best in its category, it offers a well-rounded package for fitness enthusiasts.

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