SleepU

I wear my monitor 24/7, because my desaturations are sporadic, so I never know when my oxygen will drop. It works beautifully! Can't say enough good about it. Because I wear it 24 hours a day, the fingertip sensor eventually wore out. Since it was within the 1 year warranty, the company immediately replaced it free of charge. Great service from Zoe at Viatom! I purchased another unit so I can have one set for day time (warns me when I drop below 95 so I can adjust my activity or my oxygen settings) and the other for night. I have the night one set to warn me if I drop to 91 or lower. One unit charges while I'm wearing the other. It has been a lifesaver! The printouts have given my doctors so much insight on exactly what is happening with my oxygen and heart rate. Regarding some of the negative reviews: Some users don't seem to have their information right. The display light "sleeps", so it doesn't shine all night. If you need it to wake up, you just move your wrist. The red light inside the sensor ring is the same as any oximeter. It doesn't bother me, and if it did I would put my hand under the covers. I use the computer app and save the readings as a pdf so I can send to my doctor if needed. Have never had an issue with the computer app, and it gives you a 10 hour summary and then a 5 page minute by minute breakdown. It only stores 4 readings, and each time you take it off, it starts a new monitoring period, so if you take it off a lot you will need to save your monitoring more often. The drawbacks that I agree with is that it is very sensitive to motion (it also monitors and records your motion), so I was disappointed that it would not usually record while I was walking or moving around much. But I can type on my computer, and it records just fine, and it also records all night without a problem. I wear mine 24/7, so the finger sensor did wear out, but it has a 1 year warranty, so I got a new one for free. I really can't say enough good about this device. A finger oximeter only gives you a snapshot of what is going on. This gives you 24/7 what your oxygen is as well as your heartrate, so you can see what is happening in response to different activities and be warned if you are falling to unsafe levels. Highly recommend!

Update: great while it last, the connector broke within 5 months of starting using it. This sensor is accurate and helps treating sleep apnea as you can set up a vibration when your oxygen drops below a threshold. Two downsides: 1) the mini UBS connection isn't the greatest option as it is hard to connect and require directionality, it will be much better if they offer an easier self locking connection, and 2) the sensor ring is too small and I have to wear it in the little finger.

The Good - THe device performance is good, the measurements are on the spot. - The reports are great and usable The Bad - The light on the device turns on every time you move your hand, sometimes is on your face - The downloads gets stacked sometimes, and you need to wait to charged to try downloading again - The battery only lasts 16 hours, basically needs to charge every other day - The connector is Micro USB, which is not long lasting in my experience with cell phones. And needs to be Plugged and unplugged for charging... I wonder how long is the actual usable life of the device. - The cable seems to be too long and sometimes gets stacked. They should provide two options at least. Performance is good, but, I think for a $175 device, the quality should be better

THE TWO CABLE PLUGS AND THE DEVICE PORT ARE NOT USB MICRO B CONNECTORS!! They are in the class of Type D connectors, like the video gear HDMI Type D, aka Micro-HDMI. The charging/data cable does have a Type A USB connector on the other end. Because the SleepU is a USB device (and Bluetooth). This isn't some nefarious plot by Wellue to sucker you out of your hard earned cash for replacements. Had it been designed with a Micro-B, or C, the Amazon priced $39.00 Ring Sensor ($69.00 Wellue store) could be plugged in to any one of a zillion devices with destructive consequences. With 100% hindsight, perhaps a more user friendly design would have placed a C or Mico-B port on the tail end of the device for charging and data, dedicating the Type D port up front to the Ring Sensor. Obvioulsy, the SleepU would then be not as compact. The Ring Sensor cable could be and inch or two longer as its current length appreciably limits the device's placement, especially if it needs to share wrist space with a companion fitness watch or band. The ViHealth google device (aka "phone") app and O2 Insight Pro Windows program both installed without issue and work with the SleepU as expected. I had used another recording pulse oximeter that was recommended when I expressed interest in a greater understanding of my condition, an elevated red blood cell count possibly due to an apnea-like issue. Of the fingertip variety, it required wrapping with a length of 1" cohesive bandage to secure it during sleep. As well, a steady diet of AAA batteries was essential. The ViHealth and O2 Insight Pro app reports are as accurate and detailed as for that device, which didn't have movement telemetry, with typical for me 3% and 4% ODI events data. The report chart is detailed enough to determine a drop to, say 91%, occurred at 04:37 while the CSV export nails it to 04:37:25. The device display AND the ViHealth Dashboard (live display) of SpO2% and pulse rate is apparently subject to lag or averaging. Reading concurrently with a fingertip device, I can watch the periodic up-down-up-down 99-91% values, but the SleepU display and the Dashboard report only 99-96% values. Expecting the response time and granularity of a dedicated sole purpose fingertip device is unmerited. The display is also purposed to report the device status: Bluetooth, charging, data transfer, etc. The SleepU is a Class II medical device registered with the U.S. FDA and its parent company, Viatom, maintains approvals and certifications from a broad spectrum of global medical and manufacturing bodies. And IMHO, it's well-built with quality materials.

The basics of this unit are ok, but the parameters are frustrating and you should know before you buy: 1. There is a BRIGHT red light around your finger. When in the middle of the night, this light wakes me up. 2. There is a BRIGHT display light that seems to be lit all night. It, too, keeps me up. For BOTH of these I either have to turn my arm so it faces down (not natural) or move my hand under a cover (again not what I usually do) 3. I wish the battery were powerful enough to go more than one night. You must charge every day. 4. i listen to music all night and there have been times when the unit shut itself off when competing with something else going on with my phone. The app is good. Seems to be accurate, but I don't have anything to compare it to. The lights bother me more than anything and for that I wouldn't recommend this product (hence the rating). but if you're a heavier sleeper than this would be fine for you.

First, the connector is NOT a proprietary connector, it's a USB Mini. UPDATE: The charging cable IS proprietary. It regulates the charge current to prevent damage to the battery or the device. Do not use a general cable. Only use the charger cable that came with the device. The monitor seems to work well. It records the data as programmed to. It's a bit flaky connecting to iPhone. The Bluetooth doesn't always find the device. I seem to have to reboot my iPhone before it recognizes my the SleepU sensor. (More annoying than anything else.) The real problem is the Windows app. It will not open a downloaded file regardless of what format it's stored as. For example: After a night's recording, I download the data to my iPhone. Then I send the data to my email in both .pdf and .csv formats. The Windows app does not open the .csv file nor will it open the .bin file if I download that version. Apparently the Windows app tries to use Bluetooth to download the data from the device. Unfortunately, the device's Bluetooth is not recognized by my pc. Plus, the Windows app seems poorly written and archaic, as if written in the Win95 era. Sad.

First, I can't evaluate the accuracy of the device reading. I assume its accurate. The device reading is similar to the reading at doctor's office using the fingertip sensor. Happy with the device. Works as advertised. I selected this device over Contec because the Wellue finger sensor is attached to finger more securely. Hope the device lasts a year or two. Very comfortable to wear. I'm wearing on right wrist with sensor on small finger (as shown in the listing). Battery was discharged when it arrived, so first charge. Loaded the android app from google on my phone. Easy to set the device vibration level and SO2 alarm threshold. Device provides continuous reading on the wrist (SO2 and pulse rate). Wireless connection to the phone. If you leave the phone on, also provides continuous reading on the phone and the phone will chime, if the SO2 falls below the threshold. The phone chime is loud (good). If you leave the phone off, launch the app next morning and device will download data to app. I also loaded the PC SW which works as described. One phone OS issue which impacts use, if you leave your phone on during the night (for alarm chime). Second night, android updated phone OS automatically which turned off the app. So no alarm that night. The device continued to record, so was able to download data to phone in morning. Not a big deal.

I am the poster boy for sleep disorders... Apnea with hypoxemia, narcolepsy, restless leg syndrome, and chronic low SPO2 issues and I do not tolerate the CPAP very well - but enough about me..... :) Using the Wellue SleepU Wrist Pulse Oximeter, set to alert me when SPO2 drops below 90% has been a total game changer. I no longer have periods of 30 minutes to an hour with low SPO2 causing me to wake up tired, foggy, and with a headache. This device vibrates when my SPO2 drops and if it doesn't wake me fairly quickly, my partners elbow does, enabling me to get air back into my lungs and helping to circumvent all the negative effects that have been plaguing me for many, many years. I also wear a Garmin Vivoactive IV, which has an excellent night time SPO2 monitoring feature, and is an excellent compliment to the Wellvu SleepU device.