“The device is certified as a medical instrument within the European Union,” according to BFM Tech.
Huawei launched the Watch D3 in late September, integrating a mechanical cuff designed to function as a medical-grade blood pressure monitor.
Mechanical Precision on the Wrist
Unlike standard smartwatches that rely on optical sensors, this device incorporates a mechanical air cushion directly into the strap. This engineering allows users to track blood pressure trends over 24 hours without visiting a medical office. The hardware facilitates both manual checks and automatic, scheduled readings throughout the day and night.
Identifying Nocturnal Blood Pressure Patterns
During a month-long testing period, the watch tracked specific blood pressure profiles, including “non-dipper” or “reverse-dipper” patterns. These classifications identify whether blood pressure remains elevated or fails to drop sufficiently during nighttime hours compared to daytime readings.
While the device provides an information feature to explain these metrics, users must exercise caution. In the BFM Tech test, an apparent alert regarding hypertension was ultimately attributed to the user’s prescribed beta-blocker medication. This shows why users must consult a physician for an accurate clinical interpretation of data collected by wearable devices.
Watch D3 Measures Blood Pressure and Health Indicators
The Watch D3 includes a feature to measure blood pressure before and after physical activity, specifically compatible with walking, running, and cycling. The watch triggers a 120-second countdown after exercise to track cardiovascular response. If the device detects that blood pressure exceeds a normal range following an activity, it may advise the user to refrain from high-intensity exercise until their levels stabilize.
Beyond blood pressure, the watch incorporates a “Health Overview” suite. It generates reports on up to 11 health indicators, including blood oxygen levels, heart rhythm, and arterial stiffness. These measurements are triggered by placing a finger on the button located beneath the crown, with results available in approximately 30 seconds.
Operational Constraints and Battery Life
The device faces limitations as a standard smartwatch. Due to the mechanical cuff construction, the Watch D3 is not waterproof; the manufacturer warns that water exposure can damage internal components or cause measurement errors.
The watch runs on HarmonyOS, which restricts users to applications available within the Huawei App Gallery. Popular third-party services like Spotify or Apple Music are unavailable. Battery life lasts approximately two days under intensive use, including sleep tracking and 24-hour blood pressure monitoring, and the device requires about 90 minutes to charge fully from empty.
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