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Technical information
Supported applicationGPS
Brand ASUS
Screen size 1.28 Inches
About this item
Integrated ECG and PPG Sensors: Monitors in real time your heart rate, sleep quality, exercise level and stress (HRV score)
ASUS HealthConnect mobile app: An intuitive app that lets you monitor blood pressure, heart rate, and other health and wellness data
ASUS HealthAI Technology: A unique algorithm that offers health advice based on data and habits collected
GPS Sensor: View exercise sessions, maps and activity statistics in the ASUS HealthConnect app including speeds, distances and times
28 days autonomy: 24/7 monitoring of your health in a simple and convenient way
Costumers Product Reviews
Pros
Asus vivowatch BP (HC-A04) does not actually measure blood pressure (you need a device that compresses the arteries to measure their pressure) but calculates it from the time that elapses from the heart beats until the finger artery dilates by the heartbeat. This time is called “pulse transit time” (PTT) or pulse transit time. To obtain PTT the vivowatch has an electrocardiogram sensor (ECG) that detects the electrical signal of the heart, to know when the heartbeat has occurred, and an optical sensor capable of “seeing” the blood flow and thus detecting when the pulse has reached the artery.
PTT is directly related to blood pressure, but each person has individual physiological variations that make it necessary to “calibrate” the watch so that the PTT calculation fits the blood pressure of the person who is going to wear the vivowatch.
Therefore, a traditional pressure gauge is needed to calibrate the vivowatch. This is very important for obtaining accurate measurements. Use a reliable inflatable cuff pressure gauge, or go to a doctor's office to find out your precise blood pressure, and then enter that measured value into the vivowatch so that it is calibrated. Also, this calibration should be repeated from time to time to keep the vivowatch perfectly calibrated.
Once I've told all this stuff, I tell you my experience. NOTICE: I am not a doctor or have medical knowledge.
I have taken 9 measurements with a traditional OMRON blood pressure monitor (inflatable cuff) and as many other measures with the vivowatch BP.
The measurements were not simultaneous (at the same time with both teams) because I thought that compressing the artery could alter the very blood pressure that the vivowatch would be measuring, and so I waited to finish the measurement with the blood pressure monitor and then measure with the vivowatch.
Here are the results: (NOTE: I know, I have high voltage):
OMRON VIVOWATCH DIFFERENCE
131/89
138/91 +7/+2 139/88 136/89 -3/+1
127/92 131/88 +4/-4
143/91 136/91
-7/0 127/92
132/97 +5/+5 130/89 +6/+6
135/93 +3/+5
The average difference in systolic pressure (high) between both devices is 5 mm/Hg which corresponds to an average error of 3.8%.
The mean difference in diastolic pressure (low) between both devices is 3.2 mm/Hg corresponding to an average error of 3.8%
MY VALUATION: Vivowatch measurements are sufficiently accurate, and I think they can be trusted as a fairly approximate value of the actual pressure.
TO PLEAKE INTO ACCOUNT: The measurements of both devices are different does not necessarily imply error, since they are taken at different times. In fact, there are usually differences between two consecutive measurements taken with the OMRON blood pressure monitor itself, probably because the pressure has small variations over time, or the fact of measuring itself always carries some error. So what I've marked in the difference column doesn't necessarily mean error. Even so, if we consider it wrong, the difference is small, in my view.
In addition to measuring blood pressure, the vivowatch is accompanied by the Asus Health Connect APP which stores measured pressure values, sleep hours, displays call notifications, whatsapps emails, etc., has sports functions (distance, speed), etc. The bluetooth connection is stable and I have not had problems with disconnection.
Continuous blood pressure measurement can be programmed, which is done automatically without having to put your finger on the optical and ECG sensor. The interval between automatic pressure measurements can be set from 15 minutes to 2 hours. The results of each measurement are displayed in the app with their numerical value and also graphically, allowing you to check the evolution of blood pressure throughout the 24 hours a day.
PLEASE:
- Comfortable and accurate blood pressure measurement in just a few seconds and anywhere.
- Automatic and continuous measurement (every 15 minutes) of blood pressure.
- Long battery life (up to 28 days says the manufacturer). Continuous pressure measurement every 15 minutes (maximum frequency) lasts for 15 days. If activities are done with GPS activated, it lasts considerably less.
- Lightweight and comfortable. It doesn't weigh, it doesn't bother.
- Always on display, no need to move your wrist or hit any button to see it. It is always visible during the day. At night it is necessary to give the button to turn on the backlight.
IMPROVE:
- It does not allow you to set a “do not disturb” schedule so that you do not receive notifications at night.
- The design: it is not beautiful.
ABSTRACT: An essential device for those who are concerned about their blood pressure, but always as a complement to a traditional cuff blood pressure monitor with which to compare measurements from time to time and recalibrate the vivowatch if necessary.
Cons
My father came to me with a request to find a watch with an integrated blood pressure monitor. The selection is very manageable and besides many Chinese watches here on Amazon who think to be able to (but not do) there is actually only this one from Asus. She lookschic, but it was already with the positive qualities. The display is very small and poorly read, the wiping function is roughly implemented. To measure the main function, that is, blood pressure, I need to swipe to this function and activate it... instead of just putting my finger on it and starting off.
For my more than 70 years old father, this is simply too complicated. Since the device is actually intended for older people, I really wonder what Asus was thinking about? Some things have to be simple and work.
Speaking of working: If at least the blood pressure measurement were going, one could look over the terrible menu with one eye. Nope, with my father it did not work in three days just 9 out of 10 to measure. Yes, it is slightly overweighted, and his fingers are slightly thicker, but you have to test something like that in Asus's R&D. Not even with me it worked out every time, and I am sporty and young and can also operate such a device (I thought at least). For me, the default rate was over 50%. Not
like that! And I really advise everyone from this product. That's $150 money thrown out and you're just gonna get angry. To Asus: Thanks for thinking about people who need something like this, but please sit down, rework the device and come out with a working second version
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