WellueO2Ring-S Oxygen Monitor with Vibration Reminder, Bluetooth Pulse Oximeter Tracks SPO2 and Pulse Rate, 24 hrs Battery Life, 4*10 Hours Built-in Memory, Rechargeable Pulse Ox with Free PC & APP

I purchased a second Ring the Ring-2 back in November of 2024. It did a wonderful job right up to the point it showed an Error 4 on it's display. That was about 4 months after the purchase. I tried all the suggested fixes in the instructions and those suggested on the Web, but I had no success. So I reached out to Wellue via email and was asked for some information on the ring mostly done with pictures. Wellue got back with me and wanted to know where to send the replacement. I received the replacement a few days later and it's been getting my readings since. It's been about 2 months.I've share the reports from the available software with my pulmonologist to use for may care and I use them for my monitoring of my asthma. The display is easy to read and turn on when you want to take a peak at your status, or to see why it's alarming. The Ring-2 seem to hold up very well with my daily routines and projects. It tolerates the bit of water that I will get on my hands as I wash them. I've gotten use to having it on my thumb as I go about my life. I really like this Ring-2 and am considering a second since I cracked the screen on the older Ring.

I bought this ring four months ago. It worked for the first few months, but as time went on the low oxygen warnings became more and more frequent. I have checked my sp02 with a regular oximeter and the difference was over ten points or more. The flexible part of the ring has become stretched out over time and the ring has became more and more loose on my finger. It is now to the point the ring is completely inaccurate especially while I am sleeping.Tech support for this company is only through email. And so I had to wait for a reply from them each step of our conversation. Their fix for the problem was to tell me this (I am cutting and pasting the text from the email)."Hello customer.Thank you for your information.This device has a fixed finger ring size.If the finger ring size is too large, you can try gluing the elastic section with a piece of string or tape."I have since replied to them and told them using string doesn't work, but they have ghosted me and no longer reply to my emails.Hopefully this experience helps others from making the same mistake about this product that I made. If I could give this product zero stars I would gladly do so, not overly for the product, but for the customer service.UPDATE: Customer Service reached out after review and apologized for misunderstanding and replaced the ring.

My wife needs to keep tabs on her blood oxygen level in real time, 24/7. So the commonly available units that you put on your finger to momentarily check are nice for a momentary check. But she needs to always know, and more importantly, to be alerted when it drops. This unit works very well. She sets the percentage below which she wants to be alerted, and when it falls below that level, the ring will either audibly or just with a vibration. She always uses just the vibration so it doesn’t disturb those around her, like in meetings for example. In addition it connects with an app on her phone, so it records the activity, and she can print the results. That is particularly nice so when she sees her pulmonary doctor, they can see the results as well, and make recommendations based on them. The only con we’ve ever seen is the band on the earlier versions would often break, and the ring might fall off and get lost. The vendor has aid the band material has been improved, so that should no longer be a problem. Hopefully that is the case, but in any case, this ring is a very valuable source of health information for my wife.

I bought this because I now require oxygen at night. This ring gives me peace knowing it will vibrate and set of an audible alarm when your oxygen falls below 88%! It will definitely wake you up! The data is very helpful breaking down the amount of time that your levels are in each range. I’ve only used it a week but I am super impressed and I highly recommend.

I own several pulse oximeters. They all agree closely but this unit—the O2Ring—consistently reads 3% higher than the others. This isn’t minor drift. It means the device reports normal oxygen levels when you're actually hypoxic.For a product that costs 5x to 10x more than consumer-grade devices, I expected a modicum of accuracy, if not precision or at least consistency. What I got was a device that’s not fit for any clinical, personal, or even casual monitoring use. It's just an accessory dressed up in a fancy form factor.Support asked me to “prove it with photos,” rather than troubleshoot, offer firmware updates, or acknowledge the failure. I returned it for exchange. If the next one isn't better, it's going back too.UPDATE: The replacement is here, and the verdict is in. This device does not measure SpO2 accurately. It routinely reads up to 5% too high--for many people with chronic lung diseases, 5% is the difference between sleeping soundly and needing to go to the E.R. For most people the functional range is narrow, from 87 to 97. The error factor of the O2Ring covers half that range. Relying on this device will give you a false sense of security.I understand this isn't supposed to be a medical-grade oximeter, but a product that's priced like one should perform at least as well as $20 consumer-grade units.