Exploring the capabilities of smartwatches in detecting potential signs of sleep apnea. (Illustrative AI-generated image).
Can Your Smartwatch Detect Sleep Apnea? What Experts Say
Imagine this: You wake up after what felt like a full night’s sleep, but you still feel exhausted. Your partner mentions you snore loudly and sometimes stop breathing during the night. You glance at your smartwatch, which shows a sleep score of 72. It says your blood oxygen dipped a few times. You wonder: Can this thing on my wrist tell me if I have sleep apnea?
The short answer is no, your smartwatch cannot diagnose sleep apnea. Not yet, and maybe not ever in the way a medical device can. However, some smartwatches can pick up on signs that might point to the condition. They can alert you to something worth checking out with a doctor. And that alone could be a game-changer for millions of people who have sleep apnea and don’t know it.
Let’s break down what smartwatches can and cannot do, what the experts say, and how you can use the data from your wrist to have a more informed conversation with your healthcare provider. Sleep apnea is a serious sleep disorder that affects an estimated 30 million adults in the United States alone, yet the vast majority of cases remain undiagnosed. The condition involves repeated interruptions of breathing during sleep, which can lead to oxygen deprivation, fragmented sleep, and a host of related health problems, including high blood pressure, heart disease, stroke, and daytime fatigue that increases the risk of accidents.
Traditional diagnosis requires an overnight sleep study, known as polysomnography, conducted in a sleep clinic or with a home sleep apnea test prescribed by a doctor. These tests involve multiple sensors attached to the body to measure brain waves, eye movements, heart rate, breathing patterns, airflow, blood oxygen levels, and body movements. It is a comprehensive and accurate process, but it is also inconvenient, often costly, and may involve long wait times for an appointment.
Smartwatches and other consumer wearables have become increasingly popular as general health monitors. They track steps, heart rate, sleep stages, and more. In recent years, manufacturers have added sensors for blood oxygen (SpO2) and have developed algorithms to identify sleep disturbances. The American Academy of Sleep Medicine (AASM) has published guidelines comparing the sleep features of popular smartwatches. While these devices are not medical-grade, the AASM’s work suggests that structured assessment by medical authorities is underway, acknowledging that wearables can play a role in raising awareness and prompting users to seek professional evaluation.
A 2025 article from BGR highlights five sleep tracking features users should try on their smartwatches. These include monitoring blood oxygen levels during sleep, tracking heart rate variability, detecting snoring and other sounds (via built-in microphones on some watches), analysing sleep stages (light, deep, REM), and looking for patterns of restlessness or movement. The article implies that consumers can leverage existing smartwatch capabilities to gain insights into their sleep health without waiting for a clinical diagnosis. Similarly, CNET’s 2026 list of best sleep trackers includes not only watches but also rings and mats, indicating that the sleep tracking ecosystem is diversifying. Rings such as the Oura Ring and devices like the Withings Sleep Analyzer mat offer alternative form factors that may suit different preferences and could potentially offer different levels of accuracy.
It is important to note that the FDA has not cleared any consumer smartwatch for sleep apnea diagnosis. The term “diagnosis” implies a definitive determination of a medical condition based on validated, standardized criteria. Smartwatch algorithms are not validated against polysomnography in the same way that medical devices are. Moreover, wrist-worn devices may be less accurate than dedicated medical devices because they rely on indirect measurements-such as using accelerometers to infer movements and changes in position, and optical sensors for heart rate and blood oxygen that can be affected by skin tone, watch fit, and motion artifacts. For example, a smartwatch might detect a temporary drop in blood oxygen, but it cannot distinguish between sleep apnea and other causes such as shallow breathing, changes in body position, or sensor error.
Nevertheless, the potential benefits are real. A 2023 study published in the journal Sleep found that certain consumer wearables, including some smartwatches, showed moderate to high sensitivity for detecting sleep-disordered breathing when compared to polysomnography. However, the positive predictive value-the likelihood that a detected event actually represents apnea-was lower, meaning that false alarms can occur. So while a smartwatch can alert you to patterns that may indicate sleep apnea, it cannot replace a medical study. The device can be a useful screening tool that encourages users to consult a doctor if warning signs appear.
Bhaskar English recently noted that modern wearables now track sleep, diet, body age, and more. This expansion of health monitoring capabilities means that your smartwatch is not just a step counter anymore. It might track your heart rate throughout the night, measure your respiratory rate, and even detect patterns of snoring if it has a microphone. Some watches can also provide daily readiness scores that incorporate sleep quality, heart rate variability, and activity levels. These features give users a broader picture of their overall health, but they must be interpreted with caution. For instance, a sleep score of 72 might indicate poor quality sleep, but it doesn’t tell you the specific cause. It could be due to stress, caffeine, a noisy environment, or an undiagnosed sleep disorder like sleep apnea.
If your smartwatch shows repeated drops in blood oxygen during the night or alerts you to possible breathing irregularities, it is worth taking seriously. The American Academy of Sleep Medicine recommends that anyone who suspects sleep apnea should undergo formal testing with a validated device. Your smartwatch can provide tangible data to share with your doctor, such as charts of your overnight oxygen levels and sleep stages. This information may help your doctor decide whether a sleep study is warranted. In some cases, the data might reveal a clear pattern that leads to an earlier diagnosis.
One of the challenges in the consumer wearable market is the lack of standardisation. Different brands use different sensors, algorithms, and reporting metrics. The AASM’s comparison of popular smartwatches highlights these differences. For example, some watches primarily track movement to estimate sleep stages, while others also use heart rate variability. No consumer watch is as accurate as electroencephalography (EEG) for detecting brain waves, but many are sufficiently accurate for longitudinal tracking-monitoring changes over nights and weeks. Trends, rather than absolute numbers, may be most useful for spotting potential problems.
For those who are already using a smartwatch to track sleep, the key is to view the data as a starting point, not a final answer. If you see persistent low oxygen levels or other red flags, do not dismiss them. Make an appointment with a sleep specialist. Meanwhile, the technology continues to improve. Future smartwatches may incorporate more advanced sensors-such as infrared spectroscopy or even miniaturised microphones for breathing pattern analysis-that could bring them closer to medical-grade capability. However, regulatory approval for diagnostic use would require extensive clinical validation, which could take years.
In conclusion, your smartwatch can be a helpful ally in monitoring your sleep health, but it cannot diagnose sleep apnea. It can track signs that may indicate the condition and may prompt you to seek professional help. For the millions of people with undiagnosed sleep apnea, that function alone is valuable. As the sleep tracking ecosystem expands-including rings, mats, and smartwatches-consumers have more options than ever to monitor their sleep. But until a device receives FDA clearance for sleep apnea diagnosis, the gold standard remains a clinical sleep study. Use your smartwatch as a screening tool, not a substitute for medical advice.
References
- Can your smartwatch detect sleep apnea? – Original report (Engadget)
- Can Your Smartwatch Detect Sleep Apnea? – Engadget – This is the original article that sets the premise: smartwatches cannot diagnose sleep apnea but can track potential signs.
- Comparing sleep features of popular smartwatches – American Academy of Sleep Medicine | AASM – Provides an expert medical perspective by comparing sleep tracking features of popular smartwatches.
- 5 Smartwatch Sleep Tracking Features You Need To Try – bgr.com – Offers practical advice on five sleep tracking features users should try, emphasizing usability and awareness.
- Your smartwatch can do more than count steps: These wearables now track sleep, diet, body age and more – Bhaskar English – Broadens the scope by discussing how wearables now track sleep, diet, body age, and more, showing the growing health monitoring capabilities.
- The Best Sleep Trackers of 2026: Watches, Rings and Mats – CNET – Provides a market overview of the best sleep trackers available in 2026, including watches, rings, and mats, indicating device diversity.
