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, 7 Smart Ring with Sleep Monitoring, Step Counting, Heart Rate, Blood Oxygen
Available offers (4)
Current
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Silver, 7
Retailer
€44.58
Available to order
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Price history by offer
Volatility: HighFeatures
- Intelligent sleep tracker with detailed sleep quality monitoring
- Diverse health monitoring for exercise and 24/7 heart rate and blood oxygen tracking
- 80-meter waterproof (IP68) for swimming and intense workouts
- Long battery life up to 5 days, extendable to over 30 days with charging case
- No subscription fees for full app functionality
- Compatible with iOS and Android systems
- Ultra-thin and lightweight design for comfortable wear
General specs
- Brand: Free Shark
- Seller: Retailer
- ID: B0GQTL5LHX
- Size: 7
- Brand: Free Shark
- Battery Life: 5 days, 30 days with charging case
- Compatibility: iOS, Android
- Design Features: Ultra-thin, Lightweight, Comfortable Fit
- Subscription Fee: None
- Waterproof Depth: 80 meters
- Waterproof Rating: IP68
- Charging Accessory: Smart Charging Case
- Skin Compatibility: Sensitive Skin Friendly
- Continuous Monitoring: 24-hour Heart Rate, 24-hour Blood Oxygen
- Sleep Tracking Metrics: Deep Sleep Duration, Light Sleep Duration, Wakeful States
- Exercise Tracking Modes: Running, Walking, Hiking, Cycling, Yoga, Dancing, Skipping Rope
- Exercise Tracking Metrics: Exercise Route, Exercise Time, Steps Taken, Heart Rate, Speed, Calories Burned, Exercise Distance
- Health Monitoring Features: Sleep Monitoring, Step Counting, Heart Rate Monitoring, Blood Oxygen Monitoring, Exercise Tracking
- First listed by seller: April 15, 2026
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 active professional who wants health insights without the hassle, this smart ring fits seamlessly into your daily routine. It tracks your steps during a busy workday and monitors your heart rate during a lunchtime workout, giving you a clear picture of your activity without needing to check your phone constantly.
Think of it as a personal health coach on your finger. The sleep monitoring feature records your deep and light sleep cycles, so you wake up knowing exactly how restful your night was. You can adjust your habits based on detailed reports in the app, all without any subscription fees. The IP68 waterproof design means you can wear it from the gym to the shower without worry.
With long battery life and compatibility for iOS and Android, this ring provides continuous health tracking like blood oxygen levels and step counting. It’s so lightweight you might forget it’s there, yet it delivers actionable data to help you stay on top of your wellness goals effortlessly.
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| Brand | Free Shark | Kuinha | Aoyool | REWSX | BIEMHA | S SECRETTOP |
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| Price | €44.58 | €15.15 | €35.67 | €53.49 | €51.71 | €178.36 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Apr 27, 2026 | Mar 21, 2026 | Jun 24, 2026 | May 11, 2026 | May 17, 2026 | May 20, 2026 |
| Size | 7 | 9 | 8 | 8 | ||
| Battery Life | 5 days, 30 days with charging case | 7 days | 3-5 days | 3-5 days | 3-5 days, 20 days with charging case | 3-5 days typical use, 7-10 days standby |
| Compatibility | iOS, Android | Android 6.0 or above, iOS 11.0 or higher | Android 5.0+, iOS 9.0+ | iPhone, Android | iOS, Android | |
| Sleep Tracking Metrics | Deep Sleep Duration, Light Sleep Duration, Wakeful States | Deep Sleep Duration, Light Sleep Duration, Eye Movement, Wakefulness | Total Sleep Time, Deep Sleep, Light Sleep, REM Sleep, Awake Periods | |||
| Health Monitoring Features | Sleep Monitoring, Step Counting, Heart Rate Monitoring, Blood Oxygen Monitoring, Exercise Tracking | Heart Rate, Blood Oxygen (SPO₂), Sleep Tracking, Activity Monitoring | Sleep quality tracking, Daily activity tracking, Step counting, Calorie tracking, Exercise performance tracking, Heart rate monitoring, Blood pressure monitoring | Heart Rate, Blood Oxygen (SpO2), Sleep Monitoring, Steps, Distance, Calories, Blood Pressure | ||
| Water Resistance | IP68 | IP68 | IP68 | |||
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