COLMI R03 Smart Ring: Heart rate monitoring
For the active individual who wants to track health metrics without a bulky device, this smart ring is your discreet companion for daily wellness. While many focus on step counting, it offers a deeper insight into your overall health, helping you understand how daily stress and sleep quality affect your energy levels.
The heart rate sensor accurately captures your pulse during a morning jog, and the sleep analysis reveals patterns you can adjust for better rest. With up to 39 days of battery life, you can wear it continuously without frequent charging, and its waterproof design means it stays on during swimming or showers. Use the companion app to monitor blood oxygen and activity across 20+ sports modes, giving you a clear picture of your fitness progress.
Features
- Blood oxygen monitoring
- Sleep tracking
- Activity tracking
- Waterproof for swimming
- Long battery life
- Heart rate monitoring
General specs
- Brand: COLMI
- Model: R03
- Seller: Joom
- ID: 68c2838b52941801c8fff5f1
- Size: 13
- First listed by seller: 11/15/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
COLMI R03 Black Heart rate monitoring
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EAGLE TECHS R11M Gold Real-time heart rate monitoring
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EAGLE TECHS R11M Gold Heart rate and blood oxygen monitoring
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Hivisuals sr08 Silver Heart rate and sleep tracking
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Domhong R03 Black Heart rate and blood oxygen monitoring
|
Domhong R03 Silver No app subscription required
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| Brand | COLMI | EAGLE TECHS | EAGLE TECHS | Hivisuals | Domhong | Domhong |
| Model | R03 | R11M | R11M | sr08 | R03 | R03 |
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| Price | $28.86 | $24.00 | $24.00 | $49.99 | $29.99 | $29.99 |
| Seller | Joom | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | January 29, 2026 | November 9, 2025 | June 27, 2025 | July 19, 2025 | December 6, 2025 | December 6, 2025 |
| Size | 13 | 12 | 9 | 9 | 10 | |
| OS Compatibility | Android 5.1+, iOS 8+ | Android 5.1+, iOS 8+ | Android 5.1+, iOS 8+ | |||
| Water Resistance | IP68 | IP68 | IP68 | 5ATM | 5ATM | |
| Battery Life | 3–7 d | 5–7 d | 5–7 d | |||
