# Luna Smart Ring Gen 2 The text version of the iDevice Guide at https://idevice.com/smart-rings/luna-ring-gen-2/roadmap. Same data as the page, last updated 2026-11-02. > Luna's second smart ring: sleep stages, heart rate, HRV, SpO2, temperature trends and cycle tracking, up to 30 days with its charging case, no subscription. $249 at Luna's US store. - Status: On sale - List price: $249 (The official starting price.) - Guide: https://idevice.com/smart-rings/luna-ring-gen-2/roadmap - Last updated: 2026-11-02 ## Can it do this? - **Do I need a subscription?** No. The Luna app is free, with full features from day one. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-do-i-need-a-subscription)) - **What does it cost?** It costs $249. That is the list price. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-what-does-it-cost)) - **Can it get wet — shower, pool, swimming?** Yes, you can shower and swim in it. It is rated to 50m, and for snorkelling. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-can-it-get-wet-shower-pool-swimming)) - **Does it work with my phone?** Yes, it works with an iPhone or an Android phone. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-does-it-work-with-my-phone)) - **How does it connect?** It connects over Bluetooth. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-how-does-it-connect)) - **What is it made of?** It is made of titanium. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-what-is-it-made-of)) - **What ring sizes does it come in?** It comes in US sizes 6 to 14. Order a sizing kit first, because it is not the same fit as a jewellery ring. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-what-ring-sizes-does-it-come-in)) - **Does it measure blood oxygen?** Yes, it measures your blood oxygen. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-does-it-measure-blood-oxygen)) - **Does it track HRV?** Yes, it tracks your HRV. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-does-it-track-hrv)) - **Does it track sleep stages?** Yes, it tracks your sleep stages. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-does-it-track-sleep-stages)) - **Does it read skin temperature?** Yes, it reads your skin temperature. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#can-does-it-read-skin-temperature)) ## Works with A smart ring that works with iPhone and Android. - **Does the Luna Ring Gen 2 work with Android?** Works. Yes. Pair it with the free Luna app from Google Play. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#q-android)) - **Does the Luna Ring Gen 2 work with Apple Health?** Works. Yes. Connect Apple Health on an iPhone from the Apps tab in the Luna app. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#q-apple-health)) - **Does the Luna Ring Gen 2 support Companion app / settings?** Works. Yes, Luna Ring Gen 2 uses the Luna Ring app on iPhone and Android. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2). Checked 2026-10-21. - **Does the Luna Ring Gen 2 work with Google Health Connect?** Works. Yes. Connect Google Health Connect on an Android phone from the Apps tab in the Luna app. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#q-health-connect)) - **Does the Luna Ring Gen 2 support Health integrations?** Some features missing. Partly, Luna Ring Gen 2 integrates with Apple Health on iPhone and Google Fit on Android. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2). Checked 2026-10-21. - **Does the Luna Ring Gen 2 work with iPhone?** Works. Yes. Pair it with the free Luna app from the App Store. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#q-iphone)) - **Does the Luna Ring Gen 2 support Region availability?** Some features missing. Partly, Luna says the Gen 2 ring is currently unavailable in the United States. Source: [Lunazone](https://www.lunazone.com/products/luna-smart-ring-gen-2). Checked 2026-10-21. - **How does the Luna Ring Gen 2 handle subscription?** Works. No subscription. The Luna app is free with full features from day one. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. - **How does the Luna Ring Gen 2 handle water?** Works. Luna rates the ring water resistant to 50 meters, for walking, running and yoga. Keep it out of saunas and hot tubs. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). Checked 2026-11-02. ## Questions ### How much does the Luna Ring Gen 2 cost? $249.00 at Luna's US store. Luna does not charge extra for different sizes or colors. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faq-how-much-does-the-luna-ring-gen-2-cost)) ### Which finger should I wear the Luna Ring Gen 2 on? Luna recommends the index, middle or ring finger of your non-dominant hand, with the sensor bumps on the palm side. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faq-which-finger-should-i-wear-the-luna-ring-gen-2-on)) ### Does the Luna Ring Gen 2 need a subscription? No. The Luna app is free, with no subscription fees or hidden charges. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faq-does-the-luna-ring-gen-2-need-a-subscription)) ### How long does the Luna Ring Gen 2 battery last? Luna rates it at up to 30 days of use with the charging case. A full charge takes about 60 to 90 minutes from empty. Real battery life depends on your use and settings. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faqs-how-long-does-the-luna-ring-gen-2-battery-last)) ### What is new in the Luna Ring Gen 2? Luna says Gen 2 is 10% slimmer, lighter and faster than the first Luna Ring, comes with a portable battery case for up to 30 days of use, and has refined sensor accuracy. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faqs-what-is-new-in-the-luna-ring-gen-2)) ### What does the Luna Ring Gen 2 track? Sleep stages, heart rate, HRV, SpO2, body temperature trends, activity and recovery. It also tracks menstrual cycles and ovulation from temperature and HRV. It is not a medical device. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faqs-what-does-the-luna-ring-gen-2-track)) ### What sizes does the Luna Ring Gen 2 come in? Sizes 6 to 14. Every order comes with a sizing kit first: you try the sample rings, then submit your size and color with the kit's QR code, and Luna ships the ring. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faqs-what-sizes-does-the-luna-ring-gen-2-come-in)) ### Can I swim with the Luna Ring Gen 2? Luna rates it water resistant to 50 meters. Keep it out of saunas and hot tubs. Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US). ([on the Guide](https://idevice.com/smart-rings/luna-ring-gen-2/roadmap#faqs-can-i-swim-with-the-luna-ring-gen-2)) --- Source: iDevice (https://idevice.com). Every spec, rumor and grade above links to where it came from. Full Guide: https://idevice.com/smart-rings/luna-ring-gen-2/roadmap. This file: https://idevice.com/guide-text/luna-ring-gen-2.md. ## Questions and answers ### Using it **Do I need a subscription?** No, there is no subscription. Source: Luna **What does it cost?** It costs $249. That is the list price. Source: Luna **Does it work with my phone?** Yes, it works with an iPhone or an Android phone. Source: Luna **How does it connect?** It connects over Bluetooth. Source: Luna **What is it made of?** It is made of titanium. Source: Luna **What ring sizes does it come in?** It comes in US sizes 6 to 14. Order a sizing kit first, because it is not the same fit as a jewellery ring. Source: Luna **Does it measure blood oxygen?** Yes, it measures your blood oxygen. Source: Luna **Does it track HRV?** Yes, it tracks your HRV. Source: Luna **Does it track sleep stages?** Yes, it tracks your sleep stages. Source: Luna **Does it read skin temperature?** Yes, it reads your skin temperature. Source: Luna ### Sizing and fit **What sizes does it come in?** Ring sizes 6 to 14. Source: Luna ### Water **Can it get wet — shower, pool, swimming?** Yes, you can shower and swim in it. It is rated to 50m, and for snorkelling. Source: Luna ### Price and models **Is there a newer one?** No. The Luna Smart Ring Gen 2 is the current model. Source: iDevice **How much does the Luna Smart Ring Gen 2 cost?** List price: $249.00 at Luna's US store. Current price we last read at Luna: $249, November 2, 2026. Source: [lunazone.com](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US) ### Works with **Does the Luna Ring Gen 2 work with iPhone?** Yes. Pair it with the free Luna app from the App Store. Works Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US) **Does the Luna Ring Gen 2 support Region availability?** Partly, Luna says the Gen 2 ring is currently unavailable in the United States. Some features missing Source: [Lunazone](https://www.lunazone.com/products/luna-smart-ring-gen-2) **How does the Luna Ring Gen 2 handle subscription?** No subscription. The Luna app is free with full features from day one. Works Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US) **How does the Luna Ring Gen 2 handle water?** Luna rates the ring water resistant to 50 meters, for walking, running and yoga. Keep it out of saunas and hot tubs. Works Source: [Luna](https://www.lunazone.com/products/luna-smart-ring-gen-2?country=US)