Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
Free Shark Silver, 10 Smart Ring with Sleep Monitoring, Step Counting, Heart Rate, Blood Oxygen for iOS and Android, No Subscription Fee, IP68 Waterproof Health Tracker (Silver, 10)
Available offers (4)
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Current
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Silver, 10
Retailer
€44.58
Available to order
Price history by offer
Volatility: HighFeatures
- No subscription fees required
- Sleep tracking with deep/light sleep analysis
- 24/7 heart rate and blood oxygen monitoring
- 80-meter waterproof rating
- 5-day battery life, 30 days with charging case
- Multi-sport tracking with route mapping
General specs
- Brand: Free Shark
- Seller: Retailer
- ID: B0GTHTB14G
- Size: 10
- Brand: Free Shark
- Design: Ultra-thin, Lightweight, Lighter, thinner, more comfortable
- Weight: Not specified
- Material: Not specified
- Warranty: Not specified
- Dimensions: Not specified
- Sensor Type: Optical heart rate sensor, Accelerometer
- Battery Life: 5 days, Up to 30 days with charging case
- Connectivity: Bluetooth
- Display Type: None (no screen)
- Charging Case: Yes
- Charging Time: Not specified
- Compatibility: iOS, Android
- Step Counting: Yes
- Metrics Tracked: Exercise route, Exercise time, Steps, Heart rate, Speed, Calories burned, Exercise distance
- Battery Capacity: Not specified
- Sleep Monitoring: Yes, Deep sleep duration, Light sleep duration, Wakeful states
- Subscription Fee: None
- Activity Tracking: Running, Walking, Hiking, Cycling, Yoga, Dancing, Skipping rope
- Waterproof Rating: IP68, 262 feet
- Heart Rate Monitoring: Yes, Continuous 24-hour
- Blood Oxygen Monitoring: Yes
- First listed by seller: May 20, 2026
If you are interested in more details, you can find full information on the seller's page.
Shipping options
Delivery to 
United States
United States
Available
If you're tired of wearing a bulky fitness tracker on your wrist, the Free Shark Smart Ring is the solution you've been waiting for. It's designed for health-conscious individuals who want seamless, 24/7 monitoring without the bulk or distraction of a traditional fitness band.
Most people think fitness trackers are only for tracking workouts. But this ring excels at a different angle: it's a discreet wellness partner that stays with you around the clock. Imagine wearing a ring that feels lighter than a wedding band, yet it keeps a vigilant eye on your sleep stages, heart rate, and blood oxygen levels. You'll receive detailed sleep reports that show exactly how much time you spend in deep sleep, light sleep, and wakefulness. Use this data to adjust your evening routine and wake up more refreshed.
The ring automatically detects activities like walking, running, and cycling, and even tracks swimming thanks to its 80-meter waterproof rating. No need to fumble with a device—just wear it and let it record your stats. And with a battery that lasts up to 5 days (or over 30 days with the charging case), you won't be scrambling for a charger every night. It's compatible with both iOS and Android, and there are no hidden subscription fees. Download the Free Shark Health app and get immediate access to all insights.
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| Brand | Free Shark | Nyweey | TYUIOL | FKGZJF | BIEMHA | AMOVAN |
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| Price | €44.58 | €53.49 | €21.39 | €53.49 | €98.10 | €48.15 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | May 20, 2026 | Apr 29, 2026 | May 29, 2026 | May 20, 2026 | May 29, 2026 | May 20, 2026 |
| Size | 10 | 7# | 9 | 6# (US size 6.5 approx) | 8 | |
| Weight | Not specified | 0.01 lbs | lightweight | |||
| Material | Not specified | Lightweight | epoxy resin, stainless steel | |||
| Sensor Type | Optical heart rate sensor, Accelerometer | Advanced 4.0 sensors | VC30F-S, ST LIS2DOCTR six-degree-of-freedom motion sensor | |||
| Battery Life | 5 days, Up to 30 days with charging case | 3-5 days (ring), 60 days (with charging case) | 2-3 days | |||
| Charging Time | Not specified | 2 hours (ring) | 1-1.5 hours | |||
| Compatibility | iOS, Android | iOS, Android | Android 4.4+, iOS 8.4+ | iOS, Android | ||
| Waterproof Rating | IP68, 262 feet | IP68 | 5AMT | |||
| Heart Rate Monitoring | Yes, Continuous 24-hour | 24-hour | Yes | |||
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