Xiaomi Smart Libra: How to properly configure, synchronize and use

Xiaomi’s smart scales have long since ceased to be just a weight measurement device, becoming a full-fledged health assistant that can track not only body weight, but also body fat percentage, muscle mass, water level and even bone density. However, many users face difficulties already at the first setup stage: the scales are not connected to the phone, the data is incorrectly synchronized, the indicators seem unreliable.

In this article, we’ll look at all the steps of Xiaomi’s smart scales, from unpacking and first powering on to advanced Composition Scan analysis. Focus on common mistakes (such as when the scales show “Lo” or don’t identify the user) and how to fix them, and learn how to integrate the weights into other fitness apps, such as Google Fit or Apple Health.

What models of smart scales Xiaomi produces and how they differ

Today, Xiaomi and its Mi sub-brand are producing several smart scales, key differences being the accuracy of measurements, supported metrics and design, and the most popular options you can buy in 2026:

• 📱 Xiaomi Mi Smart Scale 2 - basic model with weight measurement, BMI and 10 additional parameters (fat, muscle, water, etc.). Supports up to 16 users, runs from 4 batteries AAA.

All models except the Lite have an e-Ink display that displays weight, weather and low-power notifications. Importantly, for accurate body composition analysis, scales must have 4 electrodes (two underfoot and two on handles in manual mode models). Budget versions (such as the Smart Scale 2 Lite) measure only weight and calculate BMI by formula, which is less accurate.

First Connection: How to Sync Scales with Your Phone

Before using the scales for the first time, you need to link to your Mi Account through the Mi Fit app (or Zepp Life for new models).

1. Download the Mi Fit app from the App Store or Google Play and sign up (or sign in to an existing Xiaomi account).
2. Turn on Bluetooth on your smartphone and place the scales on a flat surface (like a tile, not a carpet).
3. Stand on the scales and the screen will show the words "Pair" (or "Pair"). At the same time, open the Profile section in the application → Add device → Libra.
4. Follow the instructions on the screen. The scales will sound, and the synchronization will be complete.

If the scales are not connected:

• 🔄 Reboot Bluetooth on your phone (turn off and turn on again).
• 📱 Make sure you have the latest version of the Mi Fit app installed.
• 🔋 Check the batteries – the “Lo” symbol on the screen means low charge.
• 🚫 Remove the scales from the device list in the phone's Bluetooth settings and repeat pairing.

Important! To accurately analyze your body composition, weigh yourself at the same time (better on an empty stomach in the morning), barefoot and without clothes. The first 2-3 measurements may be inaccurate, which is normal, since the scales need to "learn" your parameters.

How to weigh yourself: tips for accurate indicators

Xiaomi smart scales use bioelectric impedance (BIA) technology, which passes a weak current through the body and analyzes tissue resistance. To be as accurate as possible, follow these rules:

If you use a manual model (such as the Xiaomi Body Fat Scale 2), grab metal handles with your bare hands, which will allow the scales to analyze the composition of the upper body. Without this, the data on fat percentage and muscle mass will be calculated only on the legs, which is less accurate.

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If the scales show an unrealistically high percentage of fat (for example, 40% at normal weight), check if you are standing on them in socks or with wet feet.

Data Analysis: What All These Figures Mean in the App

After weighing in, the Mi Fit app has a whole list of parameters, and let's look at what they mean and what to look out for.

• 📊 Weight is a baseline. Keep track of the dynamics, not the absolute values.
• 💧 Water percentages are normal for men 50-65%, for women 45-60%. Low levels can indicate dehydration.
• 🏋️ Muscle mass is ideal if it grows with weight loss (meaning it loses fat, not muscles).
• 🍗 Fat percentage is normal for men 10-20%, for women 20-30%. Above 30% is a reason to think about diet.
• 🦴 Bone mass should be stable, a sharp decline may indicate health problems.
• ⚡ basal metabolism (BMR) — How many calories your body uses at rest, useful for calculating your daily calorie intake.
• 👵 Viscosity age – shows how much your body is “older” or “younger” than real age, according to tissue health.

Look at the charts in the Trends section, which show the dynamics of change, for example, if the weight is still, but the percentage of fat is decreasing, and muscle mass is increasing, this is a sign of successful drying (losing weight without losing muscle).

Warning: body composition data (fat, muscle, water) is an assessment, not a medical diagnosis, and depends on many factors, including hydration, time of day, and even the phase of a woman's menstrual cycle. See a doctor for professional analysis.

Common Mistakes and How to Fix Them

Even Xiaomi models that have been tested sometimes fail, and here are the most common problems and solutions:

⚠️ If the scales show "Err" or "---", This means overloading (maximum weight for most models is 150kg.

• 🔋 "Lo on the screen -- replace the batteries. Use high-quality alkaline cells. AAA (chargeless!).
• 📵 Don't connect to your phone -- remove the scales from the Bluetooth device list in your smartphone settings and do the pairing again. Also check if power saving is on -- it can block Bluetooth.
• 👤 Does not recognize the user – in the Mi Fit application go to Profile → My devices. → Libra → Manage users and add yourself again. Make sure that the weight is at least 100 g different from the previous measurement (otherwise the scales may not notice the weighting).
• 🌡️ Inaccurate metrics – weigh on a hard surface, barefoot and at the same time. If the problem persists, reset the scales to factory settings (press the button on the back for 5 seconds).

If the scales stopped syncing after the Mi Fit app update, try:

1. Delete the app cache in your phone settings (Settings → Applications → Mi Fit → Memory → Clear the cache).
2. Reinstall Mi Fit.
3. Check if the antivirus or VPN is blocking access to Xiaomi servers.

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If the scales are not turned on after replacing the batteries, check the polarity (+/-).Also make sure the contacts are not oxidized - wipe them with a stripe or alcohol.

Integration with other services: Google Fit, Apple Health, Strava

By default, Xiaomi’s weight data is only stored in Mi Fit, but it can be automatically exported to other fitness apps.

For Google Fit:

1. Open Mi Fit and go to Profile → Settings → Account Management.
2. Select Google Fit and log in.
3. Allow access to data on body weight and composition.

For Apple Health (iPhone only):

1. In Mi Fit, go to Profile → Settings → Apple Health.
2. Turn on the switches opposite the parameters you want to sync (weight, fat percentage, etc.).
3. Confirm access in the Health app on iPhone.

For Strava, MyFitnessPal or Yazio:

• 🔄 Use Google Fit or Apple Health as an intermediary. Set up data export from Mi Fit to Google Fit, and then connect Google Fit to the desired application.
• 📲 Some applications (e.g. Yazio) support direct synchronization with Mi Fit. Check integration settings in the target application.

⚠️ Attention! When synchronized with Apple Health, body composition data (fat, muscle) may not be transmitted - this is a limitation of Apple.

Resetting settings and updating firmware

If the scales start to work incorrectly (for example, constantly showing "Err" or not saving data), a reset to factory settings can help.

1. Turn the scales over and find a small hole that says Reset (or a button on the back).
2. Take a paperclip or toothpick and press the button for 5-10 seconds until the screen says "rSt" or "----."
3. Release the button. The scales will reset and be ready for a new setup.

After the reset, you will have to re-link the scales to your Mi Account account through Mi Fit.

As for firmware updates, most models do so automatically when you connect to Mi Fit, but if you want to check the software version:

1. Open Mi Fit and go to the section of your scales.
2. Slip on the three-point menu in the upper right corner and select Device Information.
3. If an update is available, an Update button will appear.

Firmware updates usually fix synchronization bugs and add support for new metrics. For example, the latest versions for Xiaomi Body Composition Scale 2 have introduced Composition Scan, an advanced body composition analysis with nutritional recommendations.

FAQ: Answers to Frequent Questions