Google is apparently testing hypertension screening on the Pixel Watch

What you need to know

• Google is testing hypertension screening on the Pixel Watch, spotted in the latest Fitbit app update.
• The new Fitbit Hypertension Study collects watch sensor data plus user input, with some participants also wearing a 24-hour blood pressure monitor for comparison.
• Selected users will get about $50 for participating in the extended monitoring trial.

Google appears to be gearing up to turn its Pixel Watch into a tool that goes beyond fitness tracking, with early signs pointing to a built-in ability to screen for hypertension.

Hints of this surfaced in the latest Fitbit app update (version 4.53), where a new “Fitbit Hypertension Study” was discovered by the folks at 9to5Google. This program is designed to gather sensor data from the Pixel Watch and pair it with user-submitted information to test how well the wearable can flag elevated blood pressure levels.

Participants who enroll in the study will be asked to answer a short questionnaire and allow the watch to passively collect health data. For a smaller group, Google may take the experiment further by providing a 24-hour blood pressure monitor for direct comparison. These users will need to wear the cuff, send it back afterward, and in return will receive about $50 for their time.

Battery trade-off

Since the study relies on continuous data collection, Google has noted that battery drain may increase while the feature is active.

Instead of giving exact blood pressure numbers like a regular cuff, the Pixel Watch would probably look for signs that suggest high blood pressure. This is similar to Apple's approach, which aims to alert users if they might need to see a doctor, not to replace medical equipment.

At this stage, there’s no guarantee that the feature will reach all users in a finished form, but this study signals a serious push by Google to explore preventive health tools through wearables.

If successful, hypertension screening would slot neatly into the Pixel Watch’s growing set of health and safety features. The Pixel Watch 3, for instance, recently rolled out loss of pulse detection in the U.S. after securing FDA clearance. That feature automatically calls emergency services if the watch detects no pulse and the wearer doesn’t respond.

Alongside this, Google has already layered in tools like Daily Readiness, Cardio Load, and Target Load to give users a clearer picture of their health trends. Hypertension screening would expand this lineup further, tackling a condition that often goes unnoticed until it causes major health issues.

Whether the feature launches broadly will depend on how well the study goes, but the direction is clear: Google wants the Pixel Watch to become a serious player in digital health.