What Fitness Trackers Measure Blood Pressure? | Cuff or Not

Only the Wellue BPW1 measures blood pressure directly with a cuff. Other devices estimate or screen for hypertension.

The question of what fitness trackers measure blood pressure has a shorter answer than most shoppers expect. After looking at every device currently on the US market, the reality is that only one wearable takes a real blood pressure reading the way your doctor does. The Wellue BPW1 uses a tiny inflatable cuff on your wrist and the oscillometric method—the same technology behind every arm cuff at the clinic. Everything else on the market either estimates your numbers through optical sensors or watches for overnight patterns that suggest high blood pressure.

This distinction between direct measurement, estimation, and screening is the single most important thing to understand before you buy. Get this wrong and you could end up with a watch that tells you nothing useful or, worse, one whose numbers you cannot trust.

Fitness Trackers and Blood Pressure: The Cuff vs. Sensor Difference

A device that measures blood pressure directly needs an inflatable cuff that physically squeezes an artery. That mechanical squeeze is what captures systolic and diastolic numbers you can rely on. Devices without a cuff use photoplethysmography (PPG) sensors plus algorithms to estimate your blood pressure from pulse wave patterns. Those estimates can track trends, but they are not diagnostic readings.

Right now the FDA has cleared exactly two wearable devices with built-in cuffs for the US market: the Wellue BPW1 and the older Omron HeartGuide. Every other watch uses estimation or screening technology that falls short of a true measurement.

The Only Fitness Tracker With Direct Blood Pressure Measurement

The Wellue BPW1 stands alone as the only current fitness tracker that takes a real blood pressure reading on your wrist. Its micro-aircuff inflates around the wrist, captures systolic and diastolic pressure using oscillometric technology, and displays the result on the watch face. The device is FDA-cleared under product code DXN, which means it meets the same standards as a traditional home blood pressure monitor.

The BPW1 costs between $199 and $249 depending on the retailer. It needs no calibration with an external cuff because the measurement is mechanical rather than algorithmic. If you need actual diagnostic numbers rather than estimates or alerts, this is the device to buy.

Which Watches Estimate Blood Pressure Instead of Measuring It

Several well-known smartwatches claim blood pressure tracking, but every one of them estimates rather than measures. The Samsung Galaxy Watch series—including the Galaxy Watch 8, 6, 5, and Active 2—uses a combination of PPG optical sensors and an ECG sensor to calculate blood pressure through pulse transit time (PTT) analysis. Samsung received FDA clearance for this feature in the US with a phased rollout starting March 31, 2026. Before that date, the feature was available only in South Korea, Europe, and Asia.

The Aktiia Bracelet takes a different approach. It uses PPG optical sensors on the wrist for continuous 24/7 monitoring and auto-calibrates against its own baseline data. The bracelet does not require a manual calibration step from the user. It is approved in Europe but is still pending FDA review for the US market as of 2025.

The Omron HeartGuide was the first FDA-cleared blood pressure watch in the US, using an inflatable wrist cuff and oscillometric measurement. It is a Class 2 medical device and remains one of only two cuff-based wearable options. However, it is an older design and has become increasingly hard to find through major retailers.

Does the Apple Watch Measure Blood Pressure?

The Apple Watch does not measure blood pressure. Starting with watchOS 26, models from the Series 9 through the Series 11 and Ultra 2 through Ultra 3 can track overnight vascular patterns over a 30-day period. If the optical sensor detects a sustained pattern that suggests high blood pressure, the watch sends a notification recommending you check with a traditional cuff. You never see a systolic or diastolic number from the watch itself.

Apple Watch users who want actual numbers can pair a third-party wireless cuff such as the iHealth Feel, which costs around $50 and syncs directly to the Health app. That combination gives you readings, but the cuff is a separate device you carry with you.

How Accurate Are Cuffless Blood Pressure Watches?

Cuffless watches can track trends over time, but they do not give you diagnostic numbers. The accuracy of a Samsung Galaxy Watch, for example, depends entirely on regular calibration with a traditional arm cuff. The FDA safety communication on unauthorized BP devices warns that unvalidated smartwatches can produce readings that lead to misdiagnosis or missed treatment. Only devices with FDA clearance—product code DXN for cuff-based monitors—should be trusted for health decisions.

The Samsung calibration process is straightforward but must be repeated every two weeks. You take a reading with a medically validated arm cuff, then enter those numbers into the Samsung Health Monitor app. Without that recalibration, accuracy degrades quickly. The Aktiia bracelet handles calibration automatically against its own baseline, but it still cannot match the precision of a direct cuff measurement.

How to Calibrate a Samsung Galaxy Watch for Blood Pressure

If you own a Samsung Galaxy Watch with the blood pressure feature, calibration is the single most important step for getting useful readings. Use a medically validated traditional arm cuff that has been properly calibrated. Take one reading with the arm cuff, then within two to three minutes take a reading with the Galaxy Watch. Open the Samsung Health Monitor app on your paired phone, select Calibrate Blood Pressure, and enter the systolic and diastolic numbers from the arm cuff. The watch uses that reference point to adjust its algorithm. Repeat this process every two weeks to maintain accuracy. When the calibration succeeds, the watch will display a confirmation on screen.

Samsung’s blood pressure feature works with Android 7 or later on Samsung phones and Android 8 or later on non-Samsung devices, plus iOS through the Samsung Health Monitor app. A Samsung account is required but no subscription fee is involved.

Choosing the Right Blood Pressure Tracker

The decision comes down to one question: do you need diagnostic numbers or trend data? If you need actual systolic and diastolic readings that you can take to your doctor, the Wellue BPW1 is the only current fitness tracker that delivers them. If you own a Samsung phone and want to monitor changes over time with regular calibration, a Galaxy Watch 8 or 6 provides useful trend data. For Apple Watch users, the hypertension notification feature is a screening tool, not a measurement—pair it with a wireless cuff for actual numbers. Browse our tested activity trackers with blood pressure monitors for specific model recommendations and real-world performance notes.

Whatever you choose, avoid any smartwatch that claims to measure blood pressure but lacks FDA clearance. The FDA’s database under product code DXN lists every authorized device. If the watch is not in that database, its blood pressure numbers are guesses, not measurements.