Best Pulse Oximeter for Sleep Apnea

Do you have sleep apnea and worry about your oxygen levels dropping below normal while you sleep? If this is you, an overnight pulse oximeter is an excellent device that will help you track your oxygen and make sure your CPAP is working as best as it can for you.

For this review, I conducted careful and extensive research to find the best pulse oximeter for sleep apnea and some great alternatives that are excellent for home overnight oximetry. These devices are designed for overnight oxygen saturation monitoring to help you maintain normal overnight oxygen levels and make the most out of your CPAP therapy.

Note that none of my recommendations include the standard fingertip pulse oximeters (the type that clips over the finger). With this type of fit, they’re not likely to stay on during the night to collect complete and accurate readings.

Also, most fingertip pulse oximeters don’t have a key feature that the pulse oximeters in this review have: a vibration alarm that prompts you to adjust your sleep position and/or CPAP therapy when your oxygen level drops below normal.

At-a-Glance

Wellue O2Ring Oxygen Monitor

My Pick: The main reason I recommend the Wellue O2Ring Oxygen Monitor over the similar Wellue SleepU Wrist Oxygen Monitor is the fact that it fits like a ring, which provides a comfortable, secure fit without the worry of anything disconnecting overnight. It vibrates to notify you when oxygen levels or heart rate are low or abnormal, so you can adjust your sleep position or CPAP during the night. Finally, the Wellue O2Ring Oxygen Monitor provides accurate readings as it continuously tracks oxygen levels every second.

Wellue SleepU Wrist Oxygen Monitor

Also Great: The Wellue SleepU Wrist Oxygen Monitor is still a great option because, in addition to still providing accurate readings and detailed analysis reports, it has a vibration alarm that tells you when your oxygen levels are low and also an excellent battery life of 16 hours. This device straps to your wrist and is connected by a wire to a ring sensor that fits over your thumb or finger. If you prefer this type of fit over the Wellue O2Ring Oxygen Monitor, I still recommend this pulse oximeter.

Wellue WearO2 Wearable Pulse Oximeter

Budget Pick: The Wellue WearO2 Wearable Pulse Oximeter makes for a good, lower-cost option. However, because of its lower cost, it has fewer features, such as no computer software capability and basic data reporting (compared to professional, more detailed reporting of the above two devices). Additionally, while this device has a preferred ring fit, it’s also the bulkiest, which you may find isn’t ideal to wear while sleeping.

The Details

My Pick: Wellue O2Ring Oxygen Monitor

Wellue O2Ring Oxygen Monitor

The Wellue O2Ring Oxygen Monitor is best-in-class when it comes to ring sensor oxygen monitors.

Firstly, it’s the perfect size and fit for overnight use. It fits comfortably over the thumb or finger, leaving the rest of the hand free for movement. With the ring fit, the Wellue O2Ring Oxygen Monitor stays on securely throughout the night and doesn’t slip off. The ring perimeter is 2-3.2 inches (50-82 mm) and adjusts to fit all sorts of finger sizes within this range.

This pulse oximeter continuously tracks oxygen levels, pulse rate, and motion every second, gathering an impressive amount of data in a typical night. It has a built-in memory for data collection, but data can also be stored using the Android or iOS app or the Mac or PC software.

The app or software that comes with the Wellue O2Ring Oxygen Monitor provides overnight oximetry interpretation and gives you access to detailed analysis reports of blood oxygen levels, heart rate, and body movements. It produces high resolution trend charts with 4-second intervals. You can also easily generate professional PDF or CSV reports to instantly send to your doctor for further analysis.

But don’t let all of that data talk overwhelm you. The reports are easy to read, if you have the right guidance. Click here to see my guide to how you should be interpreting these results (bookmark this page to refer to once you get your new pulse oximeter!).

Now let’s get to one of my favorite features of the Wellue O2Ring Oxygen Monitor: it vibrates when low oxygen levels or abnormal heart rate is detected. The vibration feature can be customized by intensity of vibration, what you want it to vibrate for (like your oxygen, heart rate, or both), and at what threshold for each.

Furthermore, an added benefit of the vibration alarm is that if you’re wearing it while sharing a bed with your partner, it only wakes you up (unlike a sound alarm, which might wake up your partner).

Recharging the Wellue O2Ring Oxygen Monitor is easy, as it only requires USB connection. Finally, the battery life of 12-16 hours is more than sufficient, as you can get about two night’s use out of it before it needs a recharge.

Pros and Cons Reported by Customers

ProsCons
Ring fit is comfortable, secure with no concerns for disconnecting overnightSome reported app issues
Vibrates when oxygen levels are below normalSome dislike the software
Can be set to vibrate at a customized oxygen level and vibration intensityDoes not sync with Apple Health
Collects accurate readings and creates detailed analysis reports on app or computer software that can be printed and shared

Also Great: Wellue SleepU Wrist Oxygen Monitor

Wellue SleepU Wrist Oxygen Monitor

The Wellue SleepU Wrist Oxygen Monitor is also an exceptional overnight pulse oximeter option. It has all of the same key features as the Wellue O2Ring Oxygen Monitor aside from a few small differences.

The device is strapped onto your wrist with an adjustable strap, which is connected to a ring sensor that’s worn on your finger or thumb. The ring perimeter is slightly smaller than the Wellue O2Ring Oxygen Monitor, at a range of 2-3 inches (50-76 mm).

Additionally, the Wellue SleepU Wrist Oxygen Monitor only vibrates when blood oxygen levels are low (as opposed to the Wellue O2Ring Oxygen Monitor, which can be set to vibrate for blood oxygen levels and/or heart rate).

Finally, the battery life of this device averages around 16 hours, which is similar to the Wellue O2Ring Oxygen Monitor, whose battery life ranges from 12-16 hours.

In my opinion, it’s the fit that makes this device slightly more inferior to the Wellue O2Ring Oxygen Monitor. There’s a risk that the ring sensor can be disconnected from the wrist strap overnight, which can lead to incomplete readings. However, due to the fact that this device has a vibration alarm for low oxygen levels and creates excellent analysis reports that you can share with your doctor, I still think this is an acceptable product if you think you prefer the way it fits compared to the Wellue O2Ring Oxygen Monitor.

Pros and Cons Reported by Customers

ProsCons
Longer battery life than the Wellue O2Ring Oxygen MonitorRisk of ring sensor disconnecting from the wrist strap overnight
Vibrates when oxygen levels are below normalDoes not have vibration alarm setting for abnormal heart rate
Can be set to vibrate at a customized oxygen level and vibration intensitySome find it too expensive
Collects accurate readings and creates detailed analysis reports on app or computer software that can be printed and sharedSome reports of defective devices

Budget Pick: Wellue WearO2 Wearable Pulse Oximeter

Wellue WearO2 Wearable Pulse Oximeter

The Wellue WearO2 Wearable Pulse Oximeter makes for a decent overnight pulse oximeter option. It’s similar to the Wellue O2Ring Oxygen Monitor, but is an earlier version that has fewer features.

It fits similarly, like a ring over your thumb or finger. However, this device is a bit more bulky, weighing 18 grams (0.63 oz) compared to 15 g (0.53 oz) of the Wellue O2Ring Oxygen Monitor. The bulkiness isn’t an ideal feature for wearing while sleeping and makes it less sleek and less comfortable compared to the Wellue O2Ring Oxygen Monitor.

Additionally, the Wellue WearO2 Wearable Pulse Oximeter has fewer app and computer software capabilities. The app generates a report of just basic data, compared to the other two pulse oximeters reviewed here that create more detailed, professional reports.

Also, unlike the other two devices, the Wellue WearO2 Wearable Pulse Oximeter doesn’t have computer software capability, and the interval in which data is reported is shorter (1 minute compared to 4 seconds of the other two devices).

Like the Wellue SleepU Wrist Oxygen Monitor, the Wellue WearO2 Wearable Pulse Oximeter only vibrates when blood oxygen levels are low (whereas the Wellue O2Ring Oxygen Monitor can be set to vibrate for both blood oxygen levels and heart rate, or one or the other).

While Wellue reports that this device is meant for daily use (compared to the other two devices which are meant for both sleep and daily use), I think this can still be used to obtain overnight readings.

Pros and Cons Reported by Customers

ProsCons
Lower priceOnly collects basic data
Vibrates when oxygen levels are below normalDoes not have vibration alarm setting for abnormal heart rate
Longer battery life than the Wellue O2Ring Oxygen MonitorShorter data interval in app
Can be used overnight along with CPAP therapyNot compatible with computer software

Recommended Pulse Oximeters for Sleep Apnea

 Wellue O2Ring Oxygen MonitorWellue SleepU Wrist Oxygen MonitorWellue WearO2 Wearable Pulse Oximeter
Works with CPAPYesYesYes
FitFits on thumb or fingerMonitor straps to wrist plus ring that fits on finger or thumbFits on thumb or finger
Weight15 g (0.52 oz)31 g (1.09 oz)18 g (0.63 oz)
Ring perimeter2.4-3.4 in (60-86 mm)2-3 in (50-76 mm)2-3 in (50-76 mm)
Wireless capabilityBluetoothBluetoothBluetooth
Prolonged trackingContinuously tracks oxygen levels and heart rate every secondContinuously tracks oxygen levels and heart rate every secondContinuously tracks oxygen levels and heart rate
Oxygen level range70-99%70-99%N/A
Alarm/notificationSilent vibration alarmSilent vibration alarmSilent vibration alarm
Customizable alarmAdjustable vibration intensity and threshold of blood oxygen and heart rateAdjustable vibration intensity and threshold of blood oxygen onlyAdjustable vibration intensity and threshold of blood oxygen only
Printable/shareable reportsPrint/share professional PDF/CSV analysis report of oxygen levels and heart ratePrint/share professional PDF/CSV analysis report of oxygen levels and heart ratePrint/share basic PDF/CSV analysis report of oxygen levels and heart rate
Display interval in app4 seconds4 seconds1 minute
PC/mac softwareYesYesYes
BatteryRechargeable via USB with 12-16 hours battery lifeRechargeable via USB with 16 hours battery lifeRechargeable via USB with 16 hours battery life
Built-in memoryYes, 4 sessions up to 10 hours eachYes, 4 sessions up to 10 hours eachYes, 4 sessions up to 10 hours each
Water resistantYesYesYes
Amazon rating4.3 / 54.2 / 54.2 / 5
PriceCheck PriceCheck PriceCheck Price

Closing Points

Wellue O2Ring Oxygen Monitor

You might have noticed that I didn’t include any fingertip pulse oximeters in this review. This is because this type of device isn’t the best for home overnight oximetry. Since they can fall of easily while sleeping, obtaining overnight readings would be difficult with these devices.

Therefore, I highly recommend the Wellue O2Ring Oxygen Monitor, as it checks all of the boxes:

  • It lets you know you when you need to adjust your sleep position to maintain normal oxygen levels
  • It obtains accurate readings that you can trust
  • You can easily view and understand your readings in detailed analysis reports (that you can also share with your doctor)
  • It’s sleek and comfortable
  • It stays on your thumb or finger securely during the night

If you think you prefer the fit of the Wellue SleepU Wrist Oxygen Monitor, however, it’s still an excellent choice. And finally, if you’re looking to spend less and don’t mind fewer features, the Wellue WearO2 Pulse Oximeter would be the option for you.

Note: Once you get your new pulse oximeter, be sure to check out my article on how to interpret your Wellue pulse oximeter results here. After reading this, you’ll have a solid, basic understanding of your results without having to wait until your next appointment with your doctor!

Wondering about the difference between Wellue vs Viatom after reading this? Wellue and Viatom collaborated to make the products reviewed here. They are manufactured with Viatom technology and distributed by Wellue.

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