Domhong R03 Smart Ring - Fitness Tracker with Heart Rate, Blood Oxygen, Stress Monitor, and Sleep Tracking: No app subscription required
For the active professional who juggles fitness goals with a busy schedule, the Domhong Smart Ring is your discreet health companion. Instead of just tracking steps, it offers peace of mind by monitoring your heart rate and stress levels throughout the day, helping you stay balanced during demanding work hours. The lightweight design feels so natural you might forget it's there, yet it accurately logs your yoga session or morning run without interrupting your flow.
With no app subscription fees, you get full access to detailed sleep analysis and blood oxygen data to optimize your recovery. The long-lasting battery lasts through your week, and the waterproof build means you can wear it from shower to swim without a second thought. Use the remote control feature to capture group photos effortlessly by simply waving your hand, making memories without fumbling for your phone.
Features
- 5ATM waterproof for swimming and diving
- Long-lasting battery life up to 7 days per charge
- Tracks heart rate, blood oxygen, stress, and sleep
- Supports multiple exercise modes like running and yoga
- Remote control photography feature
- No app subscription required
General specs
- Brand: Domhong
- Model: R03
- Seller: Amazon
- ID: B0F2DZVNBD
- Size: 10
- Battery Life: 5–7 d
- OS Compatibility: Android 5.1+, iOS 8+
- Water Resistance: 5ATM
- First listed by seller: 6/20/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
United States
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| Brand | Domhong | HitTopss | FFFITNES | Kuinha | UouNeaCo | MZJ |
| Model | R03 | R6 | 008 | R11-Black-013 | M-050819-ZH | |
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| Price | $29.99 | $29.99 | $24.99 | $16.99 | $56.99 | $55.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | Mar 11, 2026 | Mar 11, 2026 | Jun 27, 2025 | Dec 6, 2025 | Mar 11, 2026 | Mar 11, 2026 |
| Package Dimensions | 3.07 x 2.91 x 1.73 inches | 4.05 x 3.11 x 1.22 inches | 3 x 3 x 1.6 inches | |||
| Item Weight | 2.89 ounces | 2.68 ounces | 3 Grams | 3.2 ounces | ||
| batteries | 1 Lithium Polymer batteries required. (included) | 1 AAA batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 9V batteries required. (included) | ||
| Date First Available | December 25, 2024 | April 21, 2025 | April 16, 2025 | |||
| Country of Origin | China | China | China | China | ||
| Memory Storage Capacity | 64 MB | 3 MB | 64 MB | |||