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The Oura Ring 4 Stealth (Size 11) is a cutting-edge smart ring crafted from durable titanium, designed for 24/7 wear with water resistance and a comfortable fit. Powered by Smart Sensing technology, it tracks over 50 health metrics including sleep stages, heart rate, stress, and women’s health, delivering continuous, personalized insights. With up to 8 days of battery life and seamless integration with over 40 popular health apps, it empowers professionals to optimize their wellbeing discreetly and stylishly. The unique sizing kit ensures a perfect fit, and the product is HSA/FSA eligible, making it a smart investment in your health journey.

















| ASIN | B0D9WWHXHH |
| Batteries | 1 Lithium Polymer batteries required. (included) |
| Best Sellers Rank | #44 in Electronics ( See Top 100 in Electronics ) #1 in Smart Rings |
| Customer Reviews | 4.2 4.2 out of 5 stars (8,857) |
| Date First Available | October 3, 2024 |
| Item Weight | 6.3 ounces |
| Item model number | JZ90-54218-11 |
| Manufacturer | Oura |
| Product Dimensions | 0.98 x 0.98 x 0.31 inches |
K**H
Phenomenal Sleep Tracking Tool
I got this Oura ring for my wife for Christmas this past year and she loves it as well as the rose gold color. It's a very good way to take control of your sleep and improve sleep quality. The ring tracks your sleep down to the minute, is crazy accurate, and works with an app that, once installed, works offline and connects to the ring through Bluetooth. Every morning you can get a full breakdown on the app of your sleep pattern for the night including sleep stages (light, REM, deep), heart rate, heart rate variability, body temperature, respiratory rate, total sleep vs time in bed, your sleep efficiency, your "body clock" and even "sleep debt" (which tracks how much sleep you're getting vs how much you need for your body type). It also tracks the menstrual cycle for women, which my wife uses and likes a lot. She's been able to figure out a pattern based on her heart rate that happens the day before her period actually starts, which works every time - super cool! Of course it does other things like tracks your steps, exercise, you can log your meals etc. Too many things for me to include in this review. The ring fits my wife's finger perfectly. Before you buy you have to purchase the ring sizing kit, which is cheap, and you can use it for friends if you refer people (which you can get awarded for monetarily). The sizing is pretty easy, wear one of the sizers for a day and make sure it's comfortable and then order your ring. I've also seen the ring sizing kits on display in places like Costco or Best Buy, so that's another option without having to buy the kit. The battery lasts about a week, which is pretty good. And it charges in less than an hour, sometimes half an hour if she's charging it more regularly than a week (which your supposed to do). My own Oura Ring 4 is over a year old and I have to charge it every 2-3 days. I admit, I did not follow their recommendations for maintaining the best battery life, so can't complain there. Overall, Oura Ring is fantastic and I'd highly recommend it to anyone. My wife and I have both been able to improve our overall sleep quality since using them. They are a very good tool for that if you want to prioritize sleep in relation to health (which anyone should).
J**U
A great health tracker
I highly recommend getting an Oura Ring if you like keeping track of your health and I don't say it lightly. I am a Samsung girly and while I love all my Samsung stuff, I am disappointed with their Ring version. I went through 2 Samsung Rings before getting the Oura. Both Samsung rings had charging issues and stopped holding a charge. Now I have only had my Oura ring for almost a week, but I can already see that it tracks way better. The only thing I wish it could connect to is my Libre app for my Freestyle Libre 3 CGM. It does connect to Stelo by dexcom for those CGM users. I just hope that it could someday connect with Libre. Overall I am much happier.
A**I
Love this ring!
Within the 6 months of having this ring I’ve noticed that scratches have only really appeared where I hit my finger against my computer mouse at work. The rest of the ring looks great! I have some sleep and health issues so this tracking has immensely helped me find out what I need to adjust. Based on your sleep score, temperature, and heart rate, the app will let you know if something is going on - especially illnesses. It’ll let you know something minor is straining your body when you are going to be sick the following day, then show major signs when you’re actually sick, which gives great peace of mind. I also started a new medication and my general scores lately, along with other factors, have shown that I need to revisit this medication choice. I’ve also really enjoyed the cycle tracking while being off of birth control, this along with ovulation testing has been the best hormone free birth control. This has been the most accurate tracking and prediction I’ve had, in comparison to Flo and Stardust. These rings are amazing if you’re looking to have some motivation for activity, cycle tracking, sleep monitoring, and general peace of mind.
E**A
D**A
Delivery took longer than expected, but i am happy with the ring. It does exactly what they advertise. Its a nice to have.
A**ー
後で判明したがアマゾンとその他で1000円近く値段が違う。類似の商品にも出て来なかった。 24時間装着とあったので着けて寝たら、かぶれでしまった。本商品とは素材が違うが、高いので怖くて買えない
M**D
I hesitated for a while before investing in this gadget. And I love my Gadgets! but after doing some homework on the competition, I decided to jump for it. First, the fit and metal colour are great, I couldn't be happier, the quality and durability is insane, i do everything with it, I rarely take it off. The connectivity to my Samsung Z Fold6 was flawless, no hiccups, plus, everything you open the app, it updates in no time. so great compatibility. Now, you need to give it time to gather data about you, of course... it will not happen overnight which is quite right, but the intel you get afterwards is great. Your body age, sleep quality, energy available, your stress, it is such a great little ring. it is a lot of money for such a small device but the value for money is worth it. I highly recommend it if you are curious and want to be nudge in the right direction for better health.
U**A
Najlepszy tracker samopoczucia i dobrostanu
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