Many users of the Xiaomi ecosystem often wonder what kind of wearables are capable of monitoring the cardiovascular system. The market is oversaturated with gadgets, but not all of them have the functionality of a tonometer. Understanding the difference between models with an optical pulse sensor and devices with an air cuff is critical for health.
In this article, we will take a closer look at what watches measure the pressure of Xiaomi and Amazfit, and explain the physical principles of their work. You will learn why conventional fitness trackers can not replace a medical device, and what models are really worth buying to monitor hypertension.
It’s worth noting that most budget Mi Band devices don’t have built-in pressure measurement without additional accessories, but there are unique exceptions to the lineup, which we’ll look at below.
The main difference: optics versus air cuff
The first thing to understand before buying is the technological difference in measurement methods: A typical smartwatch uses an optical sensor (PPG) that shines through the skin with LEDs to detect the pulse wave. Based on algorithms, they can only supposedly estimate pressure, but these data are often highly inaccurate.
By contrast, specialized models have a micro-compressor and an inflatable cuff built right into the strap, which is exactly the same as a classical tonometer, and it is this method that produces clinically meaningful results, not just "example numbers."
⚠️ Attention: No watch without an inflatable cuff can guarantee medical accuracy in blood pressure measurements.
Xiaomi is more likely to rely on third-party solutions or partner with Amazfit to implement a full-fledged blood pressure monitor in its devices, so if you want a blood pressure monitor on your wrist, look for models labeled Blood Pressure or Monitor in the name.
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For maximum accuracy, keep your hand at heart level for hours and do not talk during the reading process.
Top models Amazfit with the function of tonometer
As the Amazfit brand is part of Xiaomi’s ecosystem, these devices are the main candidates for the role of a smart tonometer. the leader in this segment has long been the model Amazfit BIP U Pro in the special version, but the breakthrough came with the release of the Watch D series.
The Amazfit GTR 4 and newer versions are often advertised with pressure measurement, but it is important to check regional versions of the firmware. In some cases, the functionality is only available after calibrating with a real tonometer through the Zepp app.
But the flagship is the Amazfit Watch D, which looks more massive than a regular watch because of its built-in pump, and is certified as a medical product in many countries, confirming its reliability.
- 🩺 Amazfit Watch D is the only model with a full-fledged air cuff in the body.
- ⌚ Amazfit GTR 3 Pro – supports pressure assessment through algorithms (requires calibration).
- 📉 Amazfit Balance – the latest model with improved sensors of bioimpedance and pressure.
- 🔋 Amazfit BIP 5 – budget option with basic monitoring (indirect method).
When choosing between these models, it is worth considering that the accuracy of readings in the Watch D will be significantly higher due to physical compression of the artery, rather than mathematical calculation.
Comparative Characteristics Table
To make your choice easier, we have compiled a summary table of the main parameters of popular models that support pressure monitoring.
| Model | Method of measurement | Waterproofness | Autonomy |
|---|---|---|---|
| Amazfit Watch D | Air cuff | 5 ATM | 7 days |
| Amazfit GTR 4 | Optical (algorithm) | 5 ATM | 14 days |
| Xiaomi Watch S1 | Optical (algorithm) | 5 ATM | 12 days |
| Mi Band 8 Pro | No (only pulse) | 5 ATM | 14 days |
As you can see from the table, only one model has a full cuff, and the other devices use indirect methods that are more suitable for general statistics than for treatment.
When choosing, also pay attention to compatibility with the operating system of your smartphone. All functions require the application Zepp or Mi Fitness.
Why does the table show different autonomy?
How does calibration work and whether it is necessary
Owners of models without an air cuff often face calibration requirements, a process where you enter current readings of a medical tonometer into an app so that the watch can be adjusted to fit your body.
Without this procedure, algorithms can produce data with an error of up to 20-30 mm Hg, which is unacceptable for health control, and it is recommended to calibrate once a month or when you feel differently.
For models with a cuff, such as the Watch D, calibration is not required in the classical sense, since the device itself creates the necessary pressure, but the initial setting in the application is necessary for the notifications to work correctly.
⚠️ Note: Do not use the clock to adjust the dosage of drugs without consulting a doctor. Electronics are always more error than mechanics.
The adjustment process usually takes no more than 5 minutes. You need to go to the Profile menu → Health settings → Blood pressure and follow the instructions on the screen.
☑️ Preparation for the first measurement
Limitations and measurement errors
Even the most advanced Xiaomi gadgets have their limitations: wrist tattoos, low ambient temperatures, or improperly fitting a strap can distort optical sensor data.
Cuff devices are less sensitive to skin color but require a still hand. Any muscle movement during air pumping will result in a measurement error or cycle re-start.
It is also worth remembering the age restrictions: children under 16 years old use of compression watches can be uncomfortable due to the size of the cuff and compression force.
- ❄️ Low temperature narrows the vessels, which affects the readings.
- 💪 The tension of the muscles of the hand distorts the measurement result.
- 👕 Tight clothing on the forearm interferes with the proper operation of the cuff.
To obtain reliable statistics, doctors recommend measuring at the same time of day, in a calm state.
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The Amazfit Watch D gives an accuracy close to medical blood pressure monitors, while optical models are used only for trend analysis.
Integration with the Mi Home and Zepp ecosystem
All health data is automatically synchronized with your smartphone, allowing you to plot, track your dynamics, and share information with your doctor. Xiaomi's ecosystem provides deep data integration.
You can set up automatic reminders to take your blood pressure, which is especially useful for older people who may forget about the procedure, and the notification will come right on the wrist.
In addition, with a critical increase in performance, some models are able to send emergency notifications to the phone of the trusted person, if such a feature is activated in the security settings.
Can I export the data to PDF?
Conclusion and final recommendations
To sum up, full pressure measurement is available in a limited number of Xiaomi and Amazfit devices. If health is a priority, the only right choice is the Amazfit Watch D or its direct counterparts with a cuff.
The rest of the models are fitness trackers with additional, but not medical, functionality, and are useful for tracking general trends, but not for making diagnoses.
When buying, always check the equipment and availability of certificates of conformity in your area. Technology is developing rapidly, and new models may be available soon.