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Are you on the search for a device that will help you track your oxygen levels overnight?
Are you looking for guidance on which one out of the many options available is the best for you?
After heavily researching the best overnight pulse oximeter options to meet your wireless oxygen monitoring needs, I’ve found that it really comes down to two brands: Wellue (in collaboration with Viatom technology for some products) and Lookee.
For my full Wellue O2ring review please click here.
To successfully conduct home overnight oximetry, I’ve determined that a pulse oximeter that fits like a ring (like the two devices reviewed here) is the best option. This is because they:
- Fit comfortably
- Stay on securely while sleeping (unlike fingertip pulse oximeters)
- Don’t have any wiring that could be at risk of disconnecting overnight
The Wellue O2Ring and Lookee Ring Sleep Oxygen Monitor are both ring sensor overnight pulse oximeters with similar features and price point.
Therefore, to help you decide which is the best overnight pulse oximeter for you, I’ve created a helpful side-by-side comparison of these devices. [Check here my Full Welue O2Ring Review.]
In a Hurry? My Fast Answer is
Let me tell you about the Wellue O2Ring
One of the coolest things about it is that it doesn’t just clip onto your finger like your average oximeter.
Nope, it’s a smart ring that you wear on your finger, making it super comfortable and convenient.
You won’t even feel like you’re wearing anything special, yet it’s working its magic behind the scenes.
If you’re already itching to get your hands on the Wellue O2Ring (or, well, your finger in this case), I’ve got you covered.
Wellue o2ring VS lookee ring : Chart
The following table highlights key differences that show why I think the Wellue O2Ring is a better option for you.
To get a different perspective please also check my review of O2ring vs Oxylink.
| Wellue O2Ring | Lookee Ring Sleep Oxygen Monitor |
| The design is less bulky and sleek, making it more comfortable to wear while sleeping | The dimensions are slightly larger in this device |
| The ring portion is more sturdy and durable | Some users report the ring is too thin and doesn’t seem like it will last long |
| Oxygen levels and heart rate are tracked more frequently (every second) | Oxygen levels and heart rate are tracked every 4 seconds |
| The vibration alarm be used for detecting both low oxygen level and abnormal heart rate | The vibration alarm can only be used for detecting low oxygen level |
| Analysis reports can be viewed on either a computer or a mobile app | Analysis reports can only be viewed on a mobile app |
| Analysis reports can be printed for sharing with your physician | Does not produce printable analysis reports |
| The device has dust and water resistance rating of IP24 | Not water resistant |
My #1 Pick: Wellue O2Ring
The Wellue O2Ring is an extraordinary oxygen saturation tracker, as firstly, it’s the perfect size and fit.
It fits comfortably over the thumb or finger, leaving the rest of the hand free for movement.
The ring fit allows it to stay 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 within all finger sizes in this range.
This pulse oximeter collects an impressive amount of data during one recording session, as it continuously tracks oxygen levels, pulse rate, and motion every second.
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 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.
I know this is a lot of talk about data, and you might find it overwhelming. The good news is that the reports are easy to read if you have the right guidance.
Now let’s get to one of my favorite features of the Wellue O2Ring. 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 (ie, oxygen, heart rate, or both), and at what threshold for each.
Furthermore, an added benefit of the vibration alarm is that if you’re sharing a bed with a partner, it only wakes you up (unlike a sound alarm, which might wake up your partner).
Recharging the device is easy, as it only requires USB connection. Furthermore, 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 requires a recharge.
Pros and Cons
| Pros | Cons |
| Ring fit is comfortable, secure with no concerns for disconnecting overnight | Some reported app issues |
| Vibrates when oxygen levels are below normal | Some dislike the software |
| Can be set to vibrate at a customized oxygen level and vibration intensity | Does not sync with Apple Health |
| Collects accurate readings and creates detailed analysis reports on app or computer software that can be printed and shared |
Runner Up: Lookee Ring Sleep Oxygen Monitor
- ALL-DAY MONITORING: Keep continuous track of your blood oxygen level, pulse rate, and body motion all day long with LOOKEE Ring. With a full charge, it can last for up to 16 hours.
- SMART READINGS REMINDER: LOOKEE Ring is designed to notify you and mark it in the report when your O2 level falls below the preset threshold.
- DETAILED APP REPORTS: Our free app provides you with graphic O2, PR reports, and data trends. You can also share unlimited PDF and CSV reports. The app is compatible with iOS 9.0 or above, iPhone 4s/ iPad 3 or above, Android 5.0 or above.
$159.97 Only 2 left in stock – order soon.
Paid link · price checked August 15, 2026 09:16
The Lookee Ring Sleep Oxygen Monitor is a strong contender with its patented ring sensor, silent vibration alarm, and compatible mobile app for viewing analysis reports.
The device is rectangular in shape and fits like a ring over the thumb or finger, freeing the rest of the hand. It continuously tracks oxygen saturation levels and heart rate, and records data every 4 seconds.
The Lookee Ring Sleep Oxygen Monitor has a silent vibration alarm that can be set to one of five different intensity levels to alert you when oxygen levels drop below a preset threshold limit.
You can set the threshold limit to your preferred level using the mobile app. It’s important to note that the vibration alarm cannot be used for heart rate.
Data collected by the device can be viewed in the compatible mobile app, which also generates helpful analysis reports to help you see how your oxygen levels are doing.
However, it’s not compatible with a computer and doesn’t generate printable reports to share with your doctor.
Lookee Ring Pros and Cons
| Pros | Cons |
| Ring fits comfortably and securely | Some reports of the display being difficult to read |
| Vibrates when oxygen levels are low | Some reports of ring being too thin and not durable |
| Can be set to vibrate at a customized oxygen level and vibration intensity | Analysis reports cannot be viewed on a computer or printed |
| Collects accurate readings and creates detailed analysis reports on mobile app | Does not vibrate when heart rate is low |
Wellue O2Ring vs. Lookee Ring Sleep Oxygen Monitor
| Wellue O2Ring | Lookee Ring Sleep Oxygen Monitor | |
|---|---|---|
| Works with CPAP | Yes | Yes |
| Fit | Fits on thumb or finger | Fits on thumb or finger |
| Product dimensions | 1.5 x 1.2 x 1.5 in | 1.8 x 1 x 1.8 in |
| Weight | 15 g (0.52 oz) | 18 g (0.64 oz) |
| Ring perimeter | 2.4-3.4 in (60-86 mm) | 2.3-3.1 in (59-80 mm) |
| Wireless capability | Bluetooth | Bluetooth |
| Prolonged tracking | Continuously tracks oxygen levels and heart rate every second | Continuously tracks oxygen levels and heart rate every 4 seconds |
| Oxygen level range | 70-99% | 70-100% |
| Alarm/notification | Silent vibration alarm | Silent vibration alarm |
| Customizable alarm | Adjustable vibration intensity and threshold of blood oxygen and heart rate | Adjustable vibration intensity and threshold of blood oxygen only |
| Printable/shareable reports | Print/share professional PDF/CSV analysis report of oxygen levels and heart rate | Reports can be viewed in app but does not generate printable PDF reports |
| Display interval in app | 4 seconds | 4 seconds |
| PC/Mac software | Yes | No |
| Battery | Rechargeable via USB with 12-16 hours battery life | Rechargeable via USB with >16 hours battery life |
| Built-in memory | Yes, 4 sessions up to 10 hours each | Yes, 4 sessions up to 10 hours each |
| Water resistant | Yes (IP rating: IP24) | No |
| Amazon rating | 4.3 / 5 | 4 / 5 |
| Price | Check Price | Check Price |
Closing Points
When it comes down to it, the Lookee Ring Sleep Oxygen Monitor is lacking a few key features, making it a less appealing ring sensor pulse oximeter option compared to the Wellue O2Ring.
Given the above points and the small price difference between these pulse oximeters, I believe the Wellue O2Ring is the best choice for overnight oxygen saturation monitoring for you.
Wondering about the difference between Wellue vs Viatom after reading this?
Wellue and Viatom collaborated to make the Wellue O2Ring. It’s manufactured with Viatom technology and distributed by Wellue.
FAQs
What is Wellue O2ring accuracy?
It is 95% accurate device. Wellue O2ring collects accurate readings and creates detailed analysis reports on app or computer software that can be printed and shared.
What is Wellue o2ring review?
I believe the Wellue O2Ring is the best choice for overnight oxygen saturation monitoring for you.
What Wellue o2ring app to download?
Youn must download the ViHealth application from the Google Play or iOS app store.
Is wellue o2ring fda approved?
Yes. Wellue O2ring is a fda approved device that can monitor a person’s oxygen saturation levels, heart rate, and all body movements constantly.
What to choose Wellue O2ring or Lookee ring ?
Choose Wellue O2ring. The Lookee Ring Sleep Oxygen Monitor is lacking a few key features, making it a less appealing ring sensor pulse oximeter option.
For example some reports of the display being difficult to read. Some reports of ring being too thin and not durable.
Analysis reports cannot be viewed on a computer or printed. It even does not vibrate when heart rate is low.
