These O2 rings are accurate. They keep a continuous record of oxygenation, heart rate, and movement all night (or all day). The battery has lasted me over 12 hours. It probably lasts longer than that but I haven’t worn it longer than 12 hrs.The app gives you the ability to view and print a full page, detailed report covering the entire night. The report is in color, so it is very easy to read. I recommended it to my 82 yr old brother, and his report indicated low SpO2 at night. His Dr ordered a sleep study (pending) based on the report.

I've used this ring oximeter for years. Generally I wear it at night. It gives a very accurate measurement of O2 throughout out the night, as well as a useful summary of how much time was spent in various O2 ranges and how many times O2 drops. It also has various alarm settings which i disable. The last thing i want is to be woken at night when my O2 drops, but it may be useful to some people. One thing i like a lot is that it gives the time when you tap it. I wake up frequently at night an like to know what time it is without looking at a clock that sheds light all night long. The app on the phone is easy to use. I lost my original ring on a recent trip and just bought another, which is why I write this review now

Loving the information provided, seems to be accurate with my sleep,study. Easy to wear & the app is simple. Love that I can export the data to excel too.

I recently started using the Wellue O2 Ring, and I can honestly say it has transformed my sleep experience! This remarkable device seamlessly syncs with my CPAP machine, making monitoring my oxygen levels during the night easier than ever. The low-level alert feature is a game changer; it gently wakes me up when necessary, ensuring I stay safe and comfortable throughout the night. I can finally rest easy knowing that my well-being is being actively monitored while I sleep!What I love most about the Wellue O2 Ring is how incredibly user-friendly it is. It fits snugly and doesn’t interfere with my sleep at all, allowing me to drift off without any distractions. The combination of its effectiveness and comfort has truly exceeded my expectations, and I wholeheartedly recommend this product to anyone in need of reliable oxygen monitoring. If you're looking for a solution that prioritizes your health and enhances your sleep, look no further than the Wellue O2 Ring!

It appears to have lasted about 7 months.For the first 7 months, it worked very well. The O2 and pulse rate info was very valuable, and the O2 warnings were super helpful. The unit was easy to use and comfortable.Starting a couple of days ago, it started malfunctioning. First, instead of a single recording from the whole night, it would break the night into multiple segments, or not record chunks of time. Then it started triggering very noisy Device Offline alerts from the app (even though I have those turned off). Last night those warnings were every few minutes, and I took the O2 ring off. It was properly charged and Bluetooth was fine (for other devices).Not at all a good value for 7 months of service. :-(Update: As mysteriously as the Device Offline alerts started, they stopped after a few days, and the ring is working fine. So I am adjusting my rating.

I have the inspire implant due to severe sleep apnea. It’s a great device but when they first activate it, it takes a little getting used to. The guidance was, if you’re feeling tired go up a level, otherwise stay where you’re at… The only problem is that in the early going you have good days and bad days, it’s purely trial and error. It’s subjective tuning and it’s very frustrating.Being able to monitor my 02 with the Wellue 02 ring is a game changer. The app is fantastic, it provides graphs that show your 02 levels and pulse rate throughout the night; along with calculations showing amount of time below 90%, within 90-100%, average, etc. A lot of great stats. I’ve gone down 2 levels on the inspire since I got it and I may be able to go down one more level, we’ll see... This is a game changer and thanks to Wellue, I’m very happy with the inspire implant!

The device just works, is semi comfortable to wear all night and gives good insights into your ox, movement and heart rate. Great at doing what it was designed for.

A few days into using this product, I'd say that overall I'm very happy.One thing that caught me off guard though is that if you have this on you while walking, you can get sudden low oxygen readings and warnings being triggered. Looking into this some more I found out that one must stay still and keep the hand still while taking a measurement. Just something to be aware of so you don't go into a mini panic attack like I did 😅The Apple Watch that I have will detect movement and warn me to keep my hands still. Once I started doing this then I saw the blood oxygen levels going back to normal again.

It seems like it can't suddenly read pulse/O2 and it vibrates and shows -- on the screen. After a few seconds the pulse and O2 starts showing again, but it starts as a new session. I see another reviewer had the same problem. When it does this it wakes me up. Sometimes in does it 3 or 4 times a night. I've only used it 4 nights and it has woken me two out of the four nights.I am sending it back and will try another one and hopefully it will work better. I've worn it during the day to ensure that it wasn't losing good contact and it's not. It just seems not to be able to sense my pulse/O2 which causes it to restart.Update:I sent it back a got a replacement. It worked fine for a few days and then I got the reset again. I contacted support and they stated that if the sensor has pressure applied to it, that it will cause it to reset. They also suggested I do a Factory Reset from the app, which I did.I used it for a few days ensuring that I kept it away from the pillow and it worked okay for a few weeks. Then suddenly last night it started resetting. It did it about five times and I ended with the last four resets recorded and lost most of the nights sleep. I know that it wasn't toughing anything since I was awake.I did another Factory Reset and I see if it does it again tonight or the next few days. I only have until November 12th to see if this thing will keep acting up and waking me up. If it does, it's going back for good.Useless to have a device that resets so often that it wakes you up and doesn't record you full night of sleep and only has four sessions that are each about 30 minutes.

The device does what it says on the box; monitors your SPO2 levels. Just to explain, I've had open heart surgery (triple CABG) and I use a CPAP machine. 2 reasons to monitor oxygen levels. I was originally looking for a finger-clip style O2 monitor.I've been using the O2 ring for a week now and have had to only contact support once. The device wasn't being recognised by the PC software.The device is both bulky and fragile. You have to take care when removing clothing over it as you could break the elastic sensor ring. It's easy to forget it's on, so be prepared to quite often get it caught in your clothing.The elastic ring has an expansion section. I don't have large hands but I found that it was quite tight even on my index finger. You can wear it on (in order) Thumb, Index, Little finger. Not middle or ring fingers. I found wearing on my non-dominant index finger worked best. On the little finger it was too loose and kept coming off overnight.The instructions warn against squashing the sensor in either direction; flat against the display or from the sides. This makes it very difficult to hold when attaching the charging cable or removing or attaching the ring to your finger. I found that holding the device at either end of the display to be safest. Unfortunately this puts a bit of strain on the elastic sensor ring when attaching or removing the ring.The device connects to your PC via a "special" read proprietary and expensive cable ($40 USD at time of writing, so don't lose it or break it). When connected to your PC you can use the Wellue O2 ring software to download your 'session' data. But there's a trick/trap. You have to make sure Bluetooth is OFF on your phone (so support advise, however I suspect you can just move your phone out of range or turn it off. There's NOTHING you can do at the ring itself to disconnect Bluetooth)You can then connect the cable, start up the software then wait for the ring to connect and download the data. Once you've downloaded the data you can then disconnect the cable (and cease charging the ring), turn Bluetooth on your phone [ I've found the Bluetooth connectivity to the phone to be a bit random. Sometimes it works, often it doesn't. ]Note that the cable is also a charging cable. I haven't yet checked whether I can charge the device using a 'standard' charging cable while also having it connected to the phone app via Bluetooth.I'm not sure how this might help over say a finger-type O2 monitor for around $30 (less than the cost of the data/charging cable for the O2 Ring), other than the logging facility.For the money spent I can't recommend this device UNLESS you suspect you have serious O2 issues that your health professionals do not accept. This will allow you to prove to them that you have O2 issues.[ In my Country we don't get a subsidy for devices like this so it's cheaper to just make dozens of visits to the doctors and specialists. ]In summary; at the price I can live without it. If it broke outside the warranty period I likely wouldn't replace it. Perhaps I might change my mind as firmware development improves.Hope this helps.Stay safe.

The ring works well and does what it says it should. Compared to an in-hospital pulse oximeter, the results on the ring match the results on the hospital equipment. For the money, would be nice if the hardware had a better build quality. I'm not sure if it will last more than a year, but perhaps with care it will? The PC software is finnicky, you need to connect the cable, start the software, then connect the ring in order to do a download. Once you know the order, it works reliably.Overall, happy with the purchase. A better build quality would see 5/5, particularly given this isn't a cheap product.