b.ring G2 โ the smart ring with no subscription
b.ring G2 tracks your sleep, heart rate, HRV, blood oxygen (SpO2), stress and activity around the clock. Every app feature is included โ $0 per month, forever.
Key features
- Sleep tracking: sleep score, 4 sleep stages, efficiency, overnight heart rate and SpO2
- Heart rate, heart rate variability (HRV) and stress, measured automatically
- Activity, steps, calories and 18+ workout types
- Body Rhythm and a daily AI health report in the b.ring app
- Stores up to 7 days of data on the ring, even without syncing
- Works with iPhone and Android; syncs with Apple Health and Google
Specifications
| Material | Stainless steel |
| Colors | Black, Silver |
| Weight / thickness | 2.9 g / 2.7 mm (8.0 mm wide) |
| Water resistance | IP68 + 5ATM |
| Battery | Up to 7 days |
| Charging | Charging case, about 90 min |
| Sizes | US 7โ12 (see Size Guide) |
| Subscription | None โ $0/month |
| Warranty | 1 year |
FAQ
Do I need a subscription? No. All features are included with no monthly fee.
Does it work with iPhone and Android? Yes, via the free b.ring app on the App Store and Google Play.
How do I choose my size? Ring sizes can't be exchanged after purchase, so we recommend the b.ring Sizing Kit ($4.99) first.
Can I swim or shower with it? Yes. It is rated IP68 and 5ATM.
G2 or Pro? See b.ring G2 vs Pro: which smart ring and size to choose, or read what you get with a smart ring with no subscription.

