"I have a cpap machine and wanted to check if it was working properly and maintaining my o2 levels, and spoke to both my doctor and the cpap people, neither could answer my question, so I researched this o2 ring and bought this ring, it has given me piece of mind and shows my cpap treatment is going ok, when you wear the ring it is hardly noticeable and it downloads to the app easily, it is well worth buying one, everyone who has a cpap machine should buy one. The vibration alarm is great because I have a habit of getting back in bed during the night and not putting my mask on straight away, and can go to sleep, the alarm will wake me and then I can put my mask back on." 

"I purchased this following a long bout of sleep apnea that happily ended with me losing enough weight to say bye bye to my CPAP machine. I wanted to make sure my O2 levels were good enough to keep sleeping normally. This little device is comfortable to wear, works as advertised. It helps me keep my o2 levels under check. My only feedback would be that the apps report graphs should be zoomable. Apple health integration would also be nice. Besides that, excellent product."

"I have serious lung disease as well as obstructive sleep apnea. My O2 saturations vary during the day to the point that I was always looking for my pulse ox to check my levels. With the O2 Ring, I can go about my day and the vibration will let me know to get my oxygen. At night, sometimes my CPAP mask becomes dislodged. I needed something that would have a strong enough alert to wake me up to reposition my mask. The O2 Ring does just that. I have tried several other devices and this one by far works the best for me. The rechargeable battery lasts all night and into the morning. The recharge is quick. All in all, very satisfied!!" 

"This O2 ring is a very valuable tool and gives me peace of mind.

There have been several times when the O2 ring has warned me that either something was not working properly, kink in line, or I had forgotten to put the cannulas back after blowing my nose, starting to dozing off when watching TV and my oxygen drops below 90. Very comfortable to wear. For me because it vibrates a lot the battery lasts about 12 hours.. Was only on Oxygen at night with a CPAP after COVID it left me on oxygen 24/7. The reports that can be printed make for a great way to keep in touch with my Doctors also. I highly recommend this meter, compared the reading to my finger tip oximeter and they were exactly the same reading Customer support has been awesome and they have stood behind their product."