| Topic | Key Facts |
|---|---|
| Primary Use | Tracking blood pressure trends; not clinical diagnosis |
| Key Technologies | PPG (optical), PTT (pulse transit time), oscillometric cuff |
| FDA Status | A small number hold FDA 510(k) clearance; most do not |
| Who It Helps Most | Adults managing hypertension, caregivers, health-conscious consumers |
| Key Limitation | Readings are estimates; traditional upper-arm cuff remains the clinical standard |
| When to See a Doctor | Readings that trend above normal range on multiple occasions; any new or worsening symptoms alongside abnormal readings |
Nearly half of American adults live with high blood pressure, according to the CDC, and most will spend years managing a condition that rarely announces itself with obvious symptoms. For many, that means tracking numbers at a pharmacy kiosk, pulling out a home cuff every morning, or waiting for an annual checkup. Some people notice fatigue or other subtle signs before a diagnosis is made, but most do not. A smartwatch with blood pressure monitor functionality changes that routine, at least in part.
Wrist-worn devices that estimate or measure blood pressure have moved from a niche concept to a commercial reality. There is a gap, though, between what these products promise and what independent clinical research shows they can reliably deliver. This guide covers how the technology works, what FDA clearance actually means for these devices, how the top 2025 models compare, and when a smartwatch reading is useful versus when it falls short.
If you want help finding the right doctor to discuss blood pressure management, Momentary Lab's doctor finder can connect you with providers in your area.
How Smartwatches Measure Blood Pressure
Most smartwatches do not measure blood pressure the way a traditional cuff does. Instead, they use one or more indirect estimation methods.
Photoplethysmography (PPG) is the most common approach. The watch's optical sensor shines green, red, or infrared light into the skin and detects how much light is reflected back. As blood pulses through the wrist's blood vessels, that reflected light changes rhythmically. Algorithms then estimate blood pressure from those pulse wave characteristics. PPG is the same technology behind continuous heart rate monitoring on most fitness wearables.
Pulse Transit Time (PTT) measures the time it takes for a pressure wave to travel between two points in the body, typically combining an optical wrist sensor with an ECG electrode on the watch face. Faster transit correlates with higher arterial pressure. PTT methods generally require an initial calibration with a traditional cuff, and that calibration can drift over time.
Oscillometric cuff-based measurement is the only method that works the same way a clinical monitor does. A miniaturized inflatable cuff built into the watchband inflates, then deflates, detecting oscillations in the arterial wall. Watches using this method, such as the Omron HeartGuide, are bulkier but generally more accurate because they measure pressure directly rather than estimating it.
A 2025 feasibility study published in Clinical Hypertension found that cuffless wrist-based BP monitoring is technically viable for daily use, but noted that accuracy varies considerably across individuals and conditions. Optical methods are affected by motion, ambient light, skin tone, wrist circumference, and arterial stiffness in ways that oscillometric cuffs are not.
What FDA Clearance Actually Means for These Devices
FDA clearance and FDA approval are not the same thing, and the distinction is worth understanding before purchasing any blood pressure smartwatch.
FDA Approval (PMA) is reserved for novel, high-risk medical devices where the manufacturer must submit clinical evidence proving the device is safe and effective for a specific intended use.
FDA 510(k) Clearance is a separate, less stringent pathway. It allows a device to be marketed if the manufacturer can demonstrate it is "substantially equivalent" to a legally marketed predicate device. A cleared device has met a regulatory threshold, but clearance is not a guarantee of clinical-grade diagnostic accuracy.
According to the American Heart Association's December 2025 statement on cuffless blood pressure technologies, most consumer wearables currently sold as blood pressure monitors have not been validated under the rigorous independent protocols used to certify clinical blood pressure monitors. The AHA statement recommends that consumers look for devices validated according to established hypertension society standards, such as those set by the Association for the Advancement of Medical Instrumentation (AAMI) or the European Society of Hypertension (ESH).
For a device to hold FDA clearance specifically for blood pressure measurement, the manufacturer must have submitted a 510(k) premarket notification and received written clearance for that specific BP indication. Among the watches covered in this guide, Omron HeartGuide holds FDA clearance for blood pressure monitoring. Some newer cuffless devices have recently received clearance, and the regulatory picture in this category is evolving.
An FDA-cleared blood pressure smartwatch has met a regulatory standard, but it is still a monitoring tool, not a diagnostic device. A doctor can advise on individual cases regarding whether smartwatch BP data is sufficient for clinical decision-making.
Top 5 Smartwatches With Blood Pressure Monitor (2025)
The five devices below represent different approaches to wrist-based BP monitoring, from oscillometric cuffs to PPG-based estimation. Each has distinct tradeoffs.
| Watch | BP Method | FDA Cleared (BP) | Calibration Required | OS Compatibility | Price (Approx.) |
|---|---|---|---|---|---|
| Samsung Galaxy Watch 7 | PPG + ECG | No (US) | Yes, every 28 days | Android only | ~$300 |
| Omron HeartGuide | Oscillometric cuff | Yes | No (direct measure) | iOS + Android | ~$500 |
| YHE BP Doctor Pro | Oscillometric cuff | No | No (direct measure) | iOS + Android | ~$200 |
| Huawei Watch D2 | Oscillometric cuff + PPG | No (US) | No (direct measure) | Android/HarmonyOS | ~$350 |
| Withings ScanWatch 2 | PPG + ECG | Yes (ECG/SpO2; not BP) | Yes, periodic | iOS + Android | ~$350 |
Note: FDA clearance status reflects available information as of mid-2025 for the US market. Regulatory status may change. Verify with the manufacturer before purchase.
Samsung Galaxy Watch 7
Samsung's Galaxy Watch 7 includes a blood pressure monitoring feature that uses both PPG optical sensors and ECG electrodes on the watch face. The BP feature is available only in select countries and requires an Android device running the Samsung Health Monitor app. In the US, the BP monitoring function is not FDA cleared, and Samsung's app restricts BP tracking to non-US Google Play regions.
Users who can access the feature must calibrate the watch every 28 days using a validated arm cuff. Without recalibration, readings drift. The watch's broader health ecosystem includes sleep apnea detection (FDA cleared), body composition analysis, and continuous heart rate monitoring, making it a capable general health companion for Android users.
Best for: Android users outside the US who want integrated BP tracking alongside a full smartwatch feature set.
Omron HeartGuide
The Omron HeartGuide is the most clinically established smartwatch with a blood pressure monitor available in the US market. It uses an inflatable oscillometric cuff embedded in the watchband, which inflates when a measurement is initiated. The mechanism is essentially the same as a standard wrist blood pressure monitor, miniaturized into a watch form factor.
Omron's device holds FDA clearance for blood pressure measurement, placing it in a different regulatory category from PPG-based competitors. A validation study published in Medicine (2025) evaluated BP measurement accuracy via smartwatch technology in clinical populations and found that cuff-based wrist devices produced readings more consistent with upper-arm reference standards than optical sensor-based devices.
The tradeoffs are real. The HeartGuide is heavier and bulkier than most smartwatches, the display is basic, and battery life is limited. For users whose primary need is reliable, cleared BP monitoring from their wrist, it remains a strong choice.
Best for: US users with hypertension who need an FDA-cleared device for consistent wrist-based BP readings.
YHE BP Doctor Pro
The YHE BP Doctor Pro uses a similar oscillometric approach to the Omron HeartGuide at a lower price point. It includes an auto-inflating cuff for direct BP measurement, plus continuous heart rate monitoring, SpO2 tracking, and sleep analysis. It does not currently hold FDA clearance for BP measurement in the US.
A 2025 sensor validation study by Lopez-Ortiz et al. published in Sensors examined smartwatch BP accuracy compared to standard reference devices, noting that cuff-based wearable designs tend to produce tighter agreement with clinical standards than purely optical sensor designs. The YHE's oscillometric mechanism places it in the more accurate category by design, even without FDA clearance for the BP function.
Best for: Budget-conscious users who want direct cuff-based measurement without the Omron price, and who understand the device is not FDA cleared.
Huawei Watch D2
The Huawei Watch D2 is one of the few consumer smartwatches to offer 24-hour ambulatory blood pressure monitoring, measuring BP at intervals throughout the day and night, similar to the clinical ABPM methodology used by cardiologists. It uses a miniaturized oscillometric airbag combined with optical sensors.
The Watch D2 is certified by STRIDE BP, an international non-profit that validates blood pressure monitoring devices against hypertension society standards. It is not FDA cleared for the US market, which limits its formal clinical use in this context, but STRIDE BP certification is a credibility marker that few consumer wearables carry.
For users interested in overnight and around-the-clock cardiovascular monitoring, the Watch D2 offers one of the most complete wrist-based BP data sets available in a consumer device. Its primary limitation for US consumers is limited ecosystem integration and the absence of US regulatory clearance.
Best for: Users outside the US, or those who specifically want ABPM-style continuous monitoring and understand the regulatory limitations.
Withings ScanWatch 2
The Withings ScanWatch 2 is a hybrid analog-digital watch with ECG, SpO2, and heart rate monitoring. Withings has incorporated a blood pressure measurement feature using PPG-based estimation into the ScanWatch 2, requiring periodic calibration against a validated cuff.
It does not hold FDA clearance specifically for blood pressure measurement. Its ECG feature is FDA cleared. The ScanWatch 2's strengths are its design, long battery life (up to 30 days), and well-regarded companion app. Among PPG-based estimators, it sits at the premium end.
According to Consumer Reports' analysis of wearable blood pressure technologies, optical-based BP estimation devices are not yet validated under the same standards as traditional cuff-based monitors, and their accuracy relative to clinical equipment remains an open question.
Best for: Users who want a premium health watch with ECG and general cardiovascular monitoring, and treat the BP feature as a supplemental wellness tool rather than a primary measurement method.
Accuracy: What the Clinical Evidence Shows
A 2025 study published in Medicine validating smartwatch BP measurement in patients with acute ischemic stroke found that accuracy was acceptable in certain contexts but was also influenced by measurement position, arterial stiffness, and underlying vascular conditions. The authors noted that wrist-based devices performed less consistently in patients with abnormal vascular physiology.
The Lopez-Ortiz et al. validation study in Sensors (2025) examined whether a smartwatch BP device met international validation standards. The study found that performance varied across individuals and that population-level validation results do not always predict accuracy for a specific user.
Three consistent findings emerge across the recent literature:
- Oscillometric cuff-based smartwatches produce readings closer to clinical reference standards than PPG-based optical estimators.
- PPG-based sensors are sensitive to skin tone. A 2025 peer-reviewed study on PPG sensor calibration published in PMC confirmed that skin pigmentation attenuates the optical signal in individuals with darker skin tones, which can reduce the reliability of PPG-based cardiovascular estimates.
- PPG-based devices that are not regularly recalibrated against a validated cuff can produce readings that diverge meaningfully from actual blood pressure values over time.
The American Heart Association's guidance on cuffless technologies, published in December 2025, calls for industry-wide adoption of standardized validation protocols before cuffless devices can be considered appropriate for clinical care settings.
Smartwatch BP vs. Traditional Arm Cuff: When to Use Each
A traditional upper-arm cuff remains the reference standard for blood pressure measurement. The table below outlines when a smartwatch is a reasonable supplemental tool and when a standard cuff is the more appropriate choice. If cost is a concern, there are also free blood pressure monitors available through certain programs.
| Scenario | Smartwatch BP | Traditional Arm Cuff |
|---|---|---|
| Daily trend tracking at home | Reasonable supplemental tool | Best option for consistent, accurate data |
| Confirming a single elevated reading | Not reliable enough alone | Yes |
| Managing medication dosage | Do not use alone | Required; discuss with doctor |
| Pre-appointment logging | Useful for patterns | Preferred for accurate absolute values |
| Travel or convenience | Practical | Standard cuff still most reliable |
| Sleep or nighttime monitoring | Useful for trend data (ABPM-capable devices) | Impractical for overnight use |
The American Heart Association recommends that any abnormal reading on a wearable be confirmed with a validated upper-arm cuff before clinical decisions are made. A smartwatch BP function works best as a tool for recognizing patterns and prompting follow-up, not as a standalone measurement platform.
Tips for Getting the Most Accurate Readings
Reading accuracy depends heavily on technique, regardless of which smartwatch is used. The following practices are consistent with manufacturer guidance and clinical recommendations.
- Take readings at rest, after sitting quietly for five minutes. Movement, caffeine, stress, and recent exercise all temporarily affect blood pressure. Dehydration can also push readings higher, so avoid taking measurements when fluid intake has been low.
- Position the watch at heart level during measurement. For wrist-worn devices, this means resting the wrist on a flat surface at chest height.
- Ensure the watch band fits snugly but not tightly. For oscillometric cuff-based models, fit is directly linked to measurement accuracy.
- Take two or three readings two minutes apart and average the results.
- Calibrate regularly if the device uses PPG estimation. Most manufacturers recommend recalibration every 28 days, or whenever a reading seems inconsistent with recent results.
- Avoid measuring on a wrist where scars, tattoos, or significant skin texture differences sit directly under the optical sensor, as these can interfere with PPG signal quality.
- Use the same wrist, the same arm position, and roughly the same time of day so that trend comparisons are meaningful.
Who Should Not Rely Solely on Smartwatch BP Data
There are specific populations and situations where a smartwatch blood pressure monitor is not an adequate substitute for a validated clinical monitor or professional measurement.
People actively managing hypertension with medication should not use smartwatch readings as the basis for medication adjustments. Dose changes require accurate absolute values, not trend estimates. A doctor can advise on appropriate home monitoring protocols for individual circumstances.
People going through hormonal changes, including menopause, which is associated with shifts in blood pressure patterns, should be especially cautious about treating smartwatch trend data as clinically actionable without professional input.
People with atrial fibrillation (AFib) or other arrhythmias often receive inaccurate readings from optical PPG devices, because those algorithms are calibrated for regular heart rhythms. Irregular heartbeats can produce wide variations in PPG waveforms that translate into unreliable BP estimates.
People with peripheral artery disease or pronounced arterial stiffness may experience larger measurement errors in wrist-based devices, because wrist blood flow dynamics can differ from central arterial pressure in these conditions. Unmanaged high blood pressure is closely linked to heart disease and stroke risk, which is precisely why accurate monitoring in these populations matters.
People with very large or very small wrists may find that oscillometric cuff-based watches do not fit correctly, directly reducing measurement accuracy.
Anyone with new or worsening symptoms alongside an abnormal reading, such as a persistent headache, chest discomfort, or shortness of breath, should seek prompt medical evaluation rather than relying on repeated smartwatch readings to assess the situation.
If you are unsure whether a smartwatch is appropriate for your health situation, Momentary Lab's AI healthcare navigator can help you prepare questions for a clinical conversation.
Frequently Asked Questions
Can a smartwatch accurately measure blood pressure?
Smartwatches can produce blood pressure estimates, but accuracy varies by method and individual. Devices using oscillometric cuff technology tend to produce readings closer to clinical standards than PPG optical estimators. No consumer smartwatch currently matches the accuracy of a validated upper-arm cuff for absolute blood pressure values. They are best used as trend-tracking tools rather than precise measurement devices.
Which smartwatch has the most accurate blood pressure monitor?
Among commercially available options in 2025, the Omron HeartGuide is the most clinically validated, holding FDA clearance for BP measurement and using an oscillometric cuff mechanism equivalent to standard wrist monitors. The Huawei Watch D2 and YHE BP Doctor Pro also use direct cuff-based oscillometric measurement and carry independent validation certifications, though neither holds US FDA clearance specifically for BP.
Is a smartwatch BP reading as accurate as a cuff?
A traditional upper-arm cuff remains more accurate for absolute blood pressure values. Wrist-based oscillometric devices produce readings more consistent with arm-cuff standards than optical estimators, but still show meaningful individual variation. The American Heart Association's 2025 guidance recommends confirming any elevated smartwatch reading with a validated upper-arm device.
Do you need to calibrate a blood pressure smartwatch?
It depends on the method. Oscillometric cuff-based devices measure pressure directly and do not require external calibration. PPG-based estimators require periodic recalibration against a validated cuff, typically every 28 days, to maintain acceptable accuracy.
Can I use a smartwatch to manage hypertension?
A smartwatch can support hypertension management as a supplemental monitoring tool for trend awareness. It should not be used as the sole instrument for monitoring BP in people actively managing the condition, particularly where medication dosing decisions are involved. A doctor can advise on appropriate home monitoring protocols for individual circumstances.
Are blood pressure smartwatches FDA-approved?
None of the devices in this guide hold FDA approval (PMA). The Omron HeartGuide holds FDA 510(k) clearance specifically for blood pressure measurement, which is a separate and less stringent regulatory pathway. Most other consumer smartwatches with BP features have not been cleared by the FDA for BP measurement in the US.
Making Sense of the Options
The best smartwatch with blood pressure monitor depends on what the data will be used for.
For people who want reliable, FDA-cleared BP readings from their wrist and are prepared to accept a bulkier device, the Omron HeartGuide is the most defensible choice. For those outside the US managing hypertension with a focus on around-the-clock data, the Huawei Watch D2 offers ABPM-style monitoring in a consumer form factor. For users who primarily want trend awareness and lifestyle correlation within a full smartwatch ecosystem, PPG-based options like the Samsung Galaxy Watch 7 or Withings ScanWatch 2 can serve that purpose, provided readings are periodically cross-checked against a standard cuff.
None of these devices replace professional clinical assessment. Regular blood pressure monitoring by a qualified healthcare provider remains the standard of care for diagnosing and managing hypertension. If readings, family history, or lifestyle factors have prompted interest in home monitoring, the next step is a conversation with a doctor who can recommend the right protocol. In the meantime, there are also simple lifestyle habits that can support healthy blood pressure alongside any monitoring routine.
Find a doctor near you through Momentary Lab to discuss whether a blood pressure smartwatch fits into your health management plan.
