Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Free Shark Smart Ring Black with Sleep Monitoring, Step Counting, Heart Rate, IP68 Waterproof Health Tracker
Available offers (4)
Current
Black
Retailer
€26.75
Available to order
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Price history by offer
Volatility: HighFeatures
- Intelligent sleep tracker with detailed sleep analysis
- Continuous heart rate, blood oxygen, and blood pressure monitoring
- Step counting and automatic exercise tracking
- IP68 waterproof up to 80 meters depth
- Long battery life up to 5 days on a single charge
- No subscription fees for lifetime app access
General specs
- Brand: Free Shark
- Model: Smart Ring
- Seller: Retailer
- ID: B0DZXMDC27
- Health Sensors: Heart Rate
- OS Compatibility: Android, iOS
- Water Resistance: IP68
- First listed by seller: May 1, 2025
If you are interested in more details, you can find full information on the seller's page.
Price History for seller Retailer
Shipping options
Delivery to 
United States
United States
Available
For the busy professional or active parent who wants to track health without the hassle of a bulky device, this smart ring offers discreet, all-day monitoring. While most fitness wearables focus on workouts, this one shines as a personal health companion, giving you peace of mind by keeping tabs on your well-being even during sleep.
You'll appreciate how the heart rate sensor detects subtle changes during a stressful workday, alerting you to take a breather. The sleep monitoring accurately captures your deep sleep cycles, so you wake up knowing exactly how rested you are. With no subscription fees, you get lifetime access to detailed health reports on your iPhone or Android, helping you make informed lifestyle adjustments. The IP68 waterproof design means you can wear it from morning showers to evening swims without a second thought.
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| Brand | Free Shark | UouNeaCo | JHYLJSH | GJKQRJ | Generic | S SECRETTOP |
| Model | Smart Ring | R11-Black-013 | 2024 | 7 | R11M | |
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| Price | €26.75 | €53.50 | €24.07 | €53.49 | €36.57 | €214.04 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Mar 21, 2026 | Apr 18, 2026 | Dec 17, 2025 | May 20, 2026 | Mar 21, 2026 | May 7, 2026 |
| batteries | 1 Lithium Polymer batteries required. (included) | 1 AAA batteries required. (included) | 1 9V batteries required. (included) | |||
| Item Weight | 3 Grams | 2.39 ounces | 3.52 ounces | |||
| Country of Origin | China | China | China | |||
| Package Dimensions | 4.05 x 3.11 x 1.22 inches | 2.99 x 2.91 x 1.73 inches | 3.03 x 2.95 x 1.73 inches | |||
| Battery Life | 5-7 days of use, 15 days of standby | 5 days | 3-5 days typical use, 7-10 days standby | |||
| Compatibility | Android 5.1 or above, iOS 8.0 or above | iOS, Android | iOS, Android | |||
Free Shark Smart Ring Black
€26.75
When this device makes sense
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