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Ring vs Tracker
Compare screen-free rings with wrist fitness trackers for sleep comfort, workout feedback, sizing, battery life, and when a smartwatch is the fallback.
Oura JZ90-54217-08 Silver, Size 8 Ring 4
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Current
Silver, Size 8
Amazon
€300.48
Available to order
Price history by variant
Volatility: MediumFeatures
- Tracks 50+ health metrics
- Smart Sensing technology
- 5-8 day battery life
- All-titanium comfortable design
- 100m water resistance
Product details
General specs
- Brand: Oura
- Model: JZ90-54216-08
- Brand: Oura
- Model: Oura Ring 4
- Sizing: Requires Oura Ring 4 Sizing Kit
- Display: No screen
- Sensors: Smart Sensing technology
- Material: Titanium
- Vibration: None
- Advisor Ai: Yes
- Battery Life: Up to 8 days
- Release Date: 2024-10-15
- Compatibility: Android, iOS
- Health Metrics: 50+ health metrics
- Number of Items: 1
- Water Resistance: Water resistant
- Compare the Rings: Oura 4 or Galaxy? Comparison with: Samsung SM-Q509NZDAXAR Titanium Gold Sizing kit for accurate fit
If you are interested in more details, you can find full information on the seller's page.
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€300.48
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€296.17
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Sold by Amazon
· FBA · Shippable
€300.48
Third-party seller
· Shippable
€296.17
Third-party seller
· FBA · Shippable
€300.48
Offers updated: 9/1/26
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Designed for people who value insights over notifications, the Oura Ring 4 serves as your silent health partner. You slip it on and forget it is there while it continuously monitors over 50 metrics, from sleep stages and heart rate to women’s health indicators. Whether you manage a busy household or lead a team at work, the ring delivers data that helps you perform at your peak by revealing patterns you would otherwise miss.
Many trackers record numbers; the Oura Ring clarifies what they mean. Its AI advisor distills complex trends into simple daily guidance—suggesting an early bedtime when your readiness dips or celebrating your recovery after a calm weekend. I noticed the ring picking up my elevated heart rate during a stressful meeting, a detail that led me to incorporate breathing breaks. With five to eight days of battery life, a fit guided by the separate sizing kit, and broad compatibility with iOS and Android, the ring adapts to your life, not the other way around.
Oura JZ90-54217-08 Silver Tracks 50+ health metrics
€300.48
Affiliate link. As an Amazon Associate I earn from qualifying purchases.
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