How do smartwatches measure blood pressure, and are they considered accurate?

Smartwatches monitor blood pressure using two main methods. Some integrate tiny inflatable wristbands that mimic traditional cuffs for direct measurement. Others use proprietary algorithms, often requiring monthly calibration with a standard arm cuff, to estimate blood pressure from other physiological signals. Accuracy varies significantly by brand and model; some watches demonstrate strong correlation with medical-grade devices, while others show considerable discrepancies in readings when compared to medical standards.

Which smartwatches currently have regulatory clearance for blood pressure monitoring in the US?

Regulatory clearance is crucial for smartwatches offering blood pressure monitoring. In the US, some Samsung Galaxy Watch models have received FDA clearance for this specific health functionality. Other brands, such as Amazfit, provide blood pressure monitoring capabilities in certain international regions, like Brazil, but may not yet have the necessary US regulatory approval for medical use. Always verify the current regulatory status of any device before relying on it for health monitoring purposes.

Do blood pressure monitoring smartwatches require regular calibration with an arm cuff?

Yes, many smartwatches that utilize proprietary algorithms to estimate blood pressure require regular calibration. This process typically involves taking comparative readings with both the smartwatch and a traditional arm cuff several times. This periodic calibration helps maintain the watch's accuracy over time by adjusting its internal algorithm. Devices that employ integrated inflatable wristbands, which function similarly to a standard cuff, may not require the same frequent recalibration. Always follow the manufacturer's specific guidelines for your device.

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Business & Enterprise AIMonday, July 20, 2026

I tested 3 blood pressure trackers for a month - only one rivaled my Garmin Index BP Monitor

Original reporting by ZDNet

Blood pressure smartwatches are wearable devices designed to offer convenient, continuous monitoring of hypertension, a condition affecting an estimated 1.3 billion people worldwide and the leading risk factor for global death. With a significant portion of affected individuals unaware of their condition, and traditional arm cuff measurements proving inconvenient for regular tracking, these smart devices present a promising solution. One ZDNET editor, needing consistent at-home readings due to white coat syndrome, undertook a month-long investigation to evaluate the real-world accuracy of several popular smartwatches against a medical-grade blood pressure monitor.

Testing Real-World Accuracy

The rigorous test pitted three prominent models—the Samsung Galaxy Watch Ultra, Amazfit Cheetah 2 Ultra, and BP Doctor Fit—against a Garmin Index BP Monitor, taking multiple daily readings under controlled conditions. The BP Doctor Fit, which utilizes an inflatable wristband similar to a cuff, delivered inconsistent and often elevated results. Similarly, the Samsung Galaxy Watch Ultra, relying on an algorithm calibrated with an external cuff, exhibited consistent deviations. However, the Amazfit Cheetah 2 Ultra emerged as a standout, consistently providing readings within a remarkably narrow 2 to 4 mmHg range of the professional benchmark. This surprising accuracy positions the Amazfit as a highly promising and accessible tool for individuals seeking reliable, daily insights into their cardiovascular health.

The advancement of wearable technology, particularly smartwatches, is rapidly transforming personal health monitoring. While the path to accurate, reliable blood pressure measurement on the wrist has been challenging, devices like the Amazfit Cheetah 2 Ultra demonstrate that this critical functionality is maturing. The ability to track blood pressure trends throughout the day, without the inconvenience of traditional cuffs, offers a significant leap forward for individuals managing conditions like hypertension or seeking proactive health insights. This constant vigilance can empower users to better understand their body's responses to daily activities and stress, providing data valuable for both personal management and medical consultations.

The Broader Outlook

The implications of widely accessible, accurate wrist-based blood pressure monitoring extend far beyond individual convenience. With hypertension affecting billions globally, and many unaware of their condition, these devices could play a pivotal role in early detection and continuous management, potentially reducing the burden of cardiovascular disease. As regulatory bodies like the FDA continue to clear more devices, the trust and adoption of these tools will undoubtedly grow, integrating seamlessly into a holistic approach to health. We can anticipate other major tech players, from Apple to dedicated sports watch manufacturers, accelerating their efforts in this domain, driving innovation in sensor technology and algorithmic accuracy. This competitive landscape promises a future where sophisticated, data-driven insights into vital health parameters are not just available, but deeply embedded in our daily lives, transforming preventive care and personal wellness management.

Frequently asked questions

How do smartwatches measure blood pressure, and are they considered accurate?: Smartwatches monitor blood pressure using two main methods. Some integrate tiny inflatable wristbands that mimic traditional cuffs for direct measurement. Others use proprietary algorithms, often requiring monthly calibration with a standard arm cuff, to estimate blood pressure from other physiological signals. Accuracy varies significantly by brand and model; some watches demonstrate strong correlation with medical-grade devices, while others show considerable discrepancies in readings when compared to medical standards.
Which smartwatches currently have regulatory clearance for blood pressure monitoring in the US?: Regulatory clearance is crucial for smartwatches offering blood pressure monitoring. In the US, some Samsung Galaxy Watch models have received FDA clearance for this specific health functionality. Other brands, such as Amazfit, provide blood pressure monitoring capabilities in certain international regions, like Brazil, but may not yet have the necessary US regulatory approval for medical use. Always verify the current regulatory status of any device before relying on it for health monitoring purposes.
Do blood pressure monitoring smartwatches require regular calibration with an arm cuff?: Yes, many smartwatches that utilize proprietary algorithms to estimate blood pressure require regular calibration. This process typically involves taking comparative readings with both the smartwatch and a traditional arm cuff several times. This periodic calibration helps maintain the watch's accuracy over time by adjusting its internal algorithm. Devices that employ integrated inflatable wristbands, which function similarly to a standard cuff, may not require the same frequent recalibration. Always follow the manufacturer's specific guidelines for your device.

Intro and outro generated by Printing Press AI from the source article above. Always consult the original reporting for verbatim quotes and primary sources.