In the era of total digitalization of health, a conventional weight meter has transformed into a sophisticated gadget that can track dozens of body parameters. Xiaomi’s ecosystem offers a wide range of solutions, from simple models to professional body composition analyzers. It is easy for a user to buy a product to get confused by acronyms and names.
It is impossible to determine which Xiaomi scales are better without a clear understanding of your personal goals. Some people just need to monitor the dynamics of the kilograms, and someone needs a detailed analysis of muscle mass and fat percentage for professional sports. The difference in price between models can be double, so it is important not to overpay for unnecessary functions.
In this article, we will analyze the key differences between popular versions, analyze their software and help you choose the perfect device for your case.
Key criteria for choosing smart weights
Before we go into specific models, we need to understand the technologies that manufacturers use, and the basis for smart scales is bioimpedance analysis (BIA), a weak, imperceptible electrical current that is passed through the feet, which meets different resistances depending on the tissue type, and fat conducts currents worse than muscles or water, which allows algorithms to calculate the approximate ratio of body components.
However, not all devices in the Xiaomi lineup are equipped with full-fledged BIA-Basic models often work in a simplified way or have no body composition analysis function, limited to weighing. The accuracy of measurements depends on the number of electrodes and the quality of the sensors used.
Also critical is the maximum load and minimum weighing threshold. If you plan to weigh children or pets, look for the lower bound, which can range from 100 to 500 grams in different models. The upper limit is usually standard at 150 kg, but in professional versions it can be higher.
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Pay attention to the platform material: tempered glass is stronger and more durable than regular plastic, although it costs more.
The type of connection is also not to be ignored: modern gadgets sync with a smartphone using Bluetooth 5.0 protocol, which ensures stable data transfer and saves battery power. The lack of wired interfaces makes the device fully autonomous, but requires a compatible mobile phone for initial configuration.
Review of the top models: Mi Smart Scale 2 and Body Composition Scale 2
The most popular devices in the ecosystem are two main lines: Mi Smart Scale 2 and Mi Body Composition Scale 2. Despite the similarity of the names, these are fundamentally different products. The first model is a classic “smart” scales that focus on accurate weight measurement and data synchronization.
The second version, Body Composition Scale 2, is already in the analyzer category, and it can measure not only weight, but also percentage of fat, muscle mass, water, and bone mass, and it can be displayed in the Mi Fit app (now Xiaomi Wear) or Zepp Life, which plots changes.
Visually, the models are also different. The body composition analysis version often has a more massive platform and a screen hidden under glass that only lights up when weighed. The base model may have a simpler design. It is important to consider that for the body composition analysis function to work, you need to stand on the scale barefoot to ensure skin contact with the electrodes.
Both models are powered by standard AAA batteries, which is a big plus for users who don’t want to depend on rare batteries. The autonomy of the devices is high: one set of batteries lasts for 6-12 months of active use by a family of 3-4 people.
Professional level: Xiaomi Scale S400 and Pro versions
For those who are professionally engaged in sports or require medical accuracy, the company has released advanced modifications such as the Xiaomi Scale S400 or the version with the prefix Pro. The main difference between these devices is the use of 8 electrodes instead of the standard 4.
The four additional electrodes are placed on the removable handle or at the top of the platform (depending on the design), which allows current to pass through the entire body, not just through the lower limbs, and as a result, the measurement error decreases, and the data on the distribution of fat in the hands and trunk become reliable.
⚠️ Note: People with pacemakers or other implanted electronic devices are strictly prohibited from using the bioimpedance analysis function. In such cases, the scales can only be used in the normal weighing mode (guest mode), if the design allows, or refuse to use them.
Professional models often support a wider range of infant weighing, and a special mode allows you to hold the baby in your arms, weigh yourself, and then the system automatically subtracts your weight, showing the baby's mass, and this is implemented through software algorithms in the app.
Why is 8 electrodes better than 4?
Comparison of characteristics: model table
To organize information and simplify the choice, we have prepared a summary table that will help you quickly navigate the technical parameters and functionality of various devices from Xiaomi.
| Model | Analysis of body composition | Number of electrodes | Max, load. | Features |
|---|---|---|---|---|
| Mi Smart Scale 2 | No (weight only) | 4 (gauge gauges) | 150 kg | Basic model, low price |
| Mi Body Comp. Scale 2 | Yes (13 indicators) | 4 (BIA) | 150 kg | The best choice for the home |
| Xiaomi Scale S400 | Yeah, pro. | 8 (BIA) | 150 kg | High accuracy, segmental analysis |
| Mi Body Fat Scale | Yes. | 4 (BIA) | 150 kg | Old model, discontinued from production |
And you can see from the table that overpaying for the S400 only makes sense when you're doing serious sports. For the average figure-watcher, the Body Composition Scale 2 version is more than enough. The base model is for those who just need a digital weight indicator with a history on their phone.
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For 90% of users, the best choice is the Mi Body Composition Scale 2, as it combines the functionality of body analysis and an affordable price.
Software and ecosystem
Iron is only half of the success. The other half is software. All Xiaomi devices are mobile-friendly. Mi Fit was the main app, then it was renamed Zepp Life. There is now a massive migration of users to the new Xiaomi Wear app (Mi Fitness).
The setup process is simple: you need to download the application, register an account and add the device through the Profile menu. → Add the device. The scales will automatically be found over Bluetooth. It is important to give the application all the permissions requested, including geolocation, because in Android it is a requirement of the search protocol. BLE-device.
The app allows you to create profiles for different family members (up to 16 people), the system automatically recognizes the user by weight and parameter ratio, if the scales do not recognize the person, they will write the data as a guest, and they can be linked to the profile manually post-factum.
- 📊 Graphs and trends: visualizing changes in weight and fat percentage over weeks and months.
- 🏆 Gamification: Achievements and Goals that Motivate Moving More.
- 🔄 Synchronization: Integration with Google Fit, Apple Health and Samsung Health to combine data from all trackers.
It is worth noting that the functionality of the application may vary depending on the region of the account. The Chinese version of the application sometimes has more functions, but the interface is entirely in Chinese, making it uncomfortable for most users.
Practical advice on operation and calibration
For the scales to show the correct data, they must be correctly installed. The surface must be absolutely flat and hard. Carpet coatings, soft-backed linoleum or uneven tiles will cause the readings to be distorted, because the pressure sensors will not work properly.
☑️ Precise weighing rules
The best time to weigh is in the morning, after waking up, going to the toilet, and before eating and drinking water. During the day, a person's weight can fluctuate between 1-2 kg due to food, fluids and swelling. Comparing morning weight with evening weight will not give an objective picture of progress.
⚠️ Warning: Do not store scales in the bathroom or other high-humidity areas. Water falling under glass or into joints can cause contact corrosion and electronics to fail, even if claimed to be moisture-protected.
If you notice a sharp jump in readings or an Err error, try replacing batteries. Weak charge often leads to improper operation of the Bluetooth module and distortion of sensor data. It is also recommended to wipe the platform with dry cloth, avoiding aggressive chemistry.
Next Next post: What to Buy in 2026
The smart device market is constantly being updated, but Xiaomi’s lineup remains the benchmark for price-performance. At the moment, there is no point in buying older models of the first generation, as the new versions offer improved design and a stable Bluetooth module.
If your budget is limited and your fat analysis function is not critical, take the Mi Smart Scale 2. It's a reliable device that will last for years. If you're serious about healthy lifestyles, want to see muscle dynamics and control water balance, then Body Composition Scale 2 is the best investment.
For professional athletes and overweight people, where high accuracy in fat distribution is important, it is worth considering models with 8 electrodes or specialized medical equipment. However, for home use, Xiaomi’s standard smart scales are usually enough.