Oura JZ90-54217-10 Smart Ring: Accurate biometric tracking
Meet the Oura Ring 4—your new health guru, wrapped in a sleek, tech-savvy package. It's not just a ring; it's like having a mini lab on your finger, thanks to its Smart Sensing tech. This bad boy keeps tabs on everything from how well you slept to whether you're stressing too much (we've all been there), covering over 30 health metrics. And yes, it even has a special focus on women's health, because let's face it, that's important.
Dressed in all-titanium, this ring is tough enough to handle your wildest adventures yet comfy enough to forget you're wearing it. Plus, it's water-resistant—because showers and swims shouldn't stop your health tracking. And with up to 8 days of battery life, you'll spend less time charging and more time living.
Here's the lowdown on what makes it stand out: accurate tracking that doesn't miss a beat, plays nice with both iOS and Android, and buddies up with over 40 apps. Oh, and it's HSA/FSA eligible, so your wallet can breathe a sigh of relief.
Before you dive in, grab the Oura Ring 4 Sizing Kit—because nobody likes a ring that's too tight or, heaven forbid, flies off during a victory dance. Your first month of Oura Membership is on the house, unlocking even deeper insights to keep you at the top of your game.
- Up to 8 days battery life
- All-titanium design
- Water resistant
- Syncs with 40+ apps
- HSA/FSA eligible
- Accurate biometric tracking
General specs
- Brand: Oura
- Model: JZ90-54217-10
- Seller: Amazon
- product_dimensions: 1.06 x 1.06 x 0.28 inches
- item_weight: 6.3 ounces
- batteries: 1 Lithium Polymer batteries required. (included)
- connectivity_technologies: Bluetooth
- special_features: Heart Rate Monitor, Activity Tracker
- whats_in_the_box: Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide
- manufacturer: Oura
- country_of_origin: Estonia
- date_first_available: October 3, 2024
- ram_memory_installed_size: 16 MB
- First listed by seller: 5/29/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Shipping options
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Comparison with similar products
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Oura JZ90-54217-10 Accurate biometric tracking
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Oura JZ90-54144-11 Accurate biometric tracking
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Oura JZ90-54217-09 Accurate biometric tracking
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Oura JZ90-54218-11 Accurate biometric tracking
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| Brand | Oura | Oura | Oura | Oura | Oura | Oura |
| Model | JZ90-54217-10 | JZ90-54144-11 | JZ90-54217-09 | JZ90-54218-11 | JZ90-1003-06 | JZ90-1003-09 |
| Color | ||||||
| Rating |
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| Price | $349.00 | $349.00 | $349.00 | $399.00 | $199.00 | $199.00 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | August 5, 2025 | June 29, 2025 | July 18, 2025 | July 19, 2025 | June 27, 2025 | June 28, 2025 |
| product_dimensions | 1.06 x 1.06 x 0.28 inches | 1.1 x 1.1 x 0.28 inches | 1.02 x 1.02 x 0.28 inches | 0.98 x 0.98 x 0.31 inches | ||
| item_weight | 6.3 ounces | 6.7 ounces | 6.3 ounces | 6.3 ounces | ||
| batteries | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | ||
| connectivity_technologies | Bluetooth | Bluetooth | Bluetooth | Bluetooth | ||
| special_features | Heart Rate Monitor, Activity Tracker | Heart Rate Monitor, Stress Monitor | Heart Rate Monitor, Activity Tracker | |||
| whats_in_the_box | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | ||
| manufacturer | Oura | Oura | Oura | Oura | ||
| country_of_origin | Estonia | Estonia | Estonia | Estonia | ||
| date_first_available | October 3, 2024 | October 3, 2024 | October 3, 2024 | October 3, 2024 | ||
| human_interface_input | Buttons | Buttons | Touchscreen | |||
Smart Ring
Sophia T.
San Antonio, TX
June 6, 2025
As a chef and mom, I'm always on my feet and need something that keeps up without adding stress. I expected this ring to be just another gadget, but the reality is it's become an essential part of my daily routine. It's helped me understand my sleep patterns better, which is huge with a little one at home, and the emotional ups and downs it tracks have made me more aware of when I need to slow down. The design is top-notch—sleek and durable—and it pairs well with my lifestyle, from handling hot kitchen environments to playing with my dog. Honestly, it's quite impressive how much it does without being obtrusive. I'd recommend it to anyone looking to get a handle on their health without the fuss.
- Pros: I was blown away by how comfortable this ring is—I barely notice it's there, even during long shifts at the kitchen. The battery lasts forever, so I'm not constantly hunting for a charger, and it tracks my sleep and stress in such a detailed way that it feels like having a personal health coach. Plus, it works with all my devices and apps seamlessly, and the fact that it's water-resistant means I don't have to worry about it during my busy days. The insights into my health, especially around my cycle, have been a game-changer, and getting that first month free made it feel like a steal.
- Cons: The sizing process was a bit of a hassle—I had to order a separate kit to get it right, which added some extra steps before I could even start using it. Also, after the free month, there's a membership fee to access all the deeper data, which seems a bit pricey for someone always looking for a good deal. It's not a huge con, but it's something to keep in mind.