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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 JZ90-54218-11 Stealth, Size 11 Ring 4 - Stealth - Size 11
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Current
Stealth, Size 11
Amazon
€300.48
Available to order
Price history by variant
Volatility: MediumFeatures
- Tracks 50+ health metrics accurately
- Unique sizing requires sizing kit
- 5-8 days battery life
- First month membership included
- All-titanium comfortable design
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
If you are interested in more details, you can find full information on the seller's page.
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Top live offer
€300.48
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New
Sold by Amazon
FBA
Shippable
Used from
€172.18
Only from Used + Shippable live offers
Used offers
Used - Acceptable
· Third-party seller
· Shippable
€172.18
Used - Like New
· Third-party seller
· Shippable
€275.50
Offers updated: 8/31/26
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United States
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Oura Ring 4 gives you a clear picture of your health, from sleep and activity to stress and heart health. It’s designed for people who want feedback without being tethered to a screen. You slip it on, forget it’s there, and let it work in the background.
Over time, the ring becomes more than a sleep tracker. It learns your normal baselines and flags small changes before they become problems. One user noticed their body temperature trending higher two nights in a row. The next day, they felt a cold coming on. That early alert let them rest and recover faster.
The battery lasts up to 8 days, and the all-titanium body feels weightless, even during a workout. Pair it with the Oura App, where the AI Advisor turns your data into simple, daily guidance. You start with a free month of membership, then continue for $7.99 a month if you choose. No buzzing, no screen, just knowing.
Oura JZ90-54218-11 Stealth Tracks 50+ health metrics accurately
€300.48
Affiliate link. As an Amazon Associate I earn from qualifying purchases.
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