Domhong R03 Smart Ring
Available Options
A discreet smart ring designed for continuous health and fitness tracking, featuring heart rate, blood oxygen, and stress monitoring without the need for a subscription. It offers long battery life, waterproof durability, and multiple exercise modes for active lifestyles, along with a remote control for hands-free photography.
Features
- Heart rate and blood oxygen monitoring
- No app subscription required
- 5ATM waterproof rating
- Long battery life up to 7 days
- Multiple exercise modes tracking
- Remote control photography feature
Product details
General specs
- Brand: Domhong
- Model: R03
- Battery Life: 5–7 d
- Water Resistance: 5ATM
Starting from $29.99
Last price update: 11/9/25
Video Reviews
Comparison with similar products
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Samsung SM-Q502NZKAXAR Black AI Smart Ring with Fitness Monitor
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| Brand | Domhong | RingConn | RingConn | Samsung | RENPHO | Samsung |
| Model | R03 | Gen 2 | RCA-01 | SM-Q507NZDAXAR | R-MZW01 | SM-Q502NZKAXAR |
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| Price | $29.99 | $299.00 | $299.00 | $399.99 | $229.00 | $399.99 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | December 6, 2025 | December 9, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 | December 6, 2025 |
| Size | 9 | 10 | 7 | 8 | 12 | |
| Battery Life | 5–7 d | 10-12 d | 7 d | 7 d | 7 d | |
| OS Compatibility | Android, iOS | Android | Android | |||
| Material | Titanium | Titanium | Titanium | |||
Reviews
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7 reviews
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Mathieu Gonzalez
June 8, 2025
Sledge
June 8, 2025
Bullet
June 8, 2025
Julien Fischer
June 8, 2025
Amelia Clark
June 8, 2025
Joseph Garcia
June 8, 2025