How to connect Xiaomi Mi Body Composition Scale 2 to iPhone: Full Guide

The Xiaomi Mi Body Composition Scale 2 is not just a weight-measuring device, it’s a full body composition analyzer with 13 key metrics, from body mass index to visceral fat. But to access all of this data on your iPhone, the scales need to be properly connected and synchronized. Many users face difficulties at this stage: the app doesn’t see the device, the data isn’t stored, or the scales are displayed as “unconnected” after Bluetooth is on.

In this article, we will look at all the steps of connecting, from smartphone preparation to solving common errors, learn how to avoid common problems, what iOS settings can block the connection, and what to do if the scales stopped synchronizing after a firmware update.

If you have just unpacked the scales or are trying to reconnect them after reset, follow the instructions in order. If you have already had problems with synchronization, go straight to the "Problem Solutions" section.

1. Preparing iPhone and Libras for Connection

Before you start syncing, make sure your iPhone and Mi Body Composition Scale 2 scales are ready to go.Missing this stage often leads to connection failures.

Start by checking compatibility:

• 📱 iOS version: scales officially support iOS 10.0 and newer. on iOS 9 and below, the Mi Fit app may not install or work with errors.
• 🔋 Charging scales: if the indicator on the scales does not light up when pressed, replace the batteries (use 4)×AAA). Libras do not have a built-in battery – they work only from batteries.
• 📶 Bluetooth: iPhones must be enabled with Bluetooth 4.0 or later. Make sure it is active in Control Point or Settings → Bluetooth.

Also check if the connection blocks the power saving or background activity restriction mode for the Mi Fit application.

1. Open the Settings. → Battery.
2. Scroll down and find Mi Fit in the list of apps.
3. Make sure the Background Activity Switch is on (green).

Install/update the Mi Fit app|

Turn Bluetooth on iPhone|

Replace batteries in weights (if the indicators do not burn)|

Turn off the power saving mode |

Check background activity for Mi Fit-->

2. Installation and configuration of the Mi Fit application

The official Mi Fit app is the only way to connect the Mi Body Composition Scale 2 scale to an iPhone. Alternative apps (like Apple Health or Google Fit) can only receive data after initial synchronization via Mi Fit.

Download the app from the App Store:

• 🔍 Type in the search Mi Fit (developer – Xiaomi Inc.).
• ⚠️ Not to be confused with Mi Home – it’s a smart home app, it doesn’t work with scales.
• 📥 Install and open the app. First run, you will need to register a Xiaomi account (via email, phone number or Google account).

After registration, perform the basic profile setting:

1. Indicate your gender, height, weight and date of birth – this is critical for the accuracy of body composition measurements.
2. In the Devices section (badge "+" in the upper right corner, select Libra → Mi Body Composition Scale 2.
3. Follow the instructions on the screen for pairing.

If you’ve used a scale before, but want to connect it to a new iPhone, remove it from the Mi Fit list of devices on your old phone first, or there may be a connection conflict.

iOS 16 or newer|

iOS 15|

iOS 14|

iOS 13 or older-->

3. Step-by-step instructions for connecting the scales

Now, let's move directly to synchronization. Follow the instructions carefully, because even one step can fail.

Step 1: Activation of the balance pairing mode

Stand on the scale without shoes (the legs should touch the electrodes). In 3-5 seconds, the display will appear the inscription. CON (connect, which means that the scale is ready to connect, if the inscription doesn't appear:

• 🔄 Take off the weight and stand up again.
• 🔋 Check the batteries.
• 📵 Make sure the scales are not connected to another device.

Step 2. Search for scales in Mi Fit

At Mi Fit, please:

1. Go to Profile → Devices → Add the device.
2. Choose Libra → Mi Body Composition Scale 2.
3. Click Connect and wait until the app finds the scales (can take up to 30 seconds).

Step 3: Completion of the setup

After successful connection:

• 📊 The app will prompt you to enter your target weight and activity level – fill in these fields for personalized recommendations.
• 🔄 Libra automatically syncs data with Mi Fit every time you stand up on them (when Bluetooth is turned on on on on iPhone).
• 🌐 You can enable data export to Apple Health or Google Fit in your profile settings.

💡

The scales should be on a flat, hard surface (not on the carpet!) and the uneven coating distorts the readings of the body composition sensors.

Configuring the measurement parameters

By default, the Mi Body Composition Scale 2 scale measures 13 metrics, but some of them can be turned off or adjusted. For example, if you're an athlete, you might be more interested in tracking muscle mass than bone mass.

To adjust the parameters:

1. Open Mi Fit and go to the Profile section → Mi Body Composition Scale 2.
2. Click on the device settings (cog in the upper right corner).
3. Here you can: 👤 Change the user profile (if several people use the scale). 📏 Set up units of measurement (kg/pound/walls). 🔕 Turn off the sound signals (useful if you weigh yourself at night). 🔄 Turn on/off autosynchronization with Apple Health.

Notice the sensor sensitivity parameter if you get unstable readings (e.g., weight jumps) ±2kg, try it out:

• 🧘 Get up on the scales at the same time (better in the morning on an empty stomach).
• 🚿 Measure weight without socks (skin should touch electrodes).
• 📵 Make sure there are no other Bluetooth enabled devices nearby (they may interfere with your Bluetooth).

5. Data synchronization with Apple Health

If you use the standard Health app on your iPhone, you can set up automatic data export from Mi Fit. This is convenient for comprehensive health analysis along with data from other devices (for example, Apple Watch).

To adjust the synchronization:

1. Open Mi Fit and go to Profile → Settings → Apple Health.
2. Turn on the switch to sync data.
3. Choose which indicators to export (weight, percentage of fat, muscle mass, etc.).
4. Confirm access in the Apple Health pop-up window.

Synchronization limitations:

• ❌ Not all 13 weights are supported by Apple Health, for example, data on visceral fat or metabolic age may not be exported.
• ⏳ Synchronization occurs with a delay of up to 5 minutes.
• 🔄 If you delete Mi Fit, Apple Health data will remain, but no new ones will be added.

💡

To speed up sync, open the Health app on your iPhone and manually update the data by pulling the screen down.

6. Solving Connection Problems

If the Mi Body Composition Scale 2 scales don’t connect to your iPhone, check out the following points:

Problem 1: Libra is not in Mi Fit

• 🔄 Reset the scales: Remove the batteries for 10 seconds and insert back.
• 📵 Make sure the scales are not connected to another device (like an Android smartphone).
• 🔋 Check the battery charge – if the indicator flashes red, replace them.

Problem 2: Data is not saved

• 📱 Update the Mi Fit app to the latest version in the App Store.
• 🔄 Reconnect the scales: remove them from the list of devices in Mi Fit and add again.
• 🌐 Check your internet connection – without it, your data may not sync to the cloud.

Problem 3: Libra shows an Err error

⚠️ Attention: Err usually means overload (maximum weight 150 kg) or unstable position. Stand on the scales flatly, without shoes, and repeat the measurement.

If none of the methods helped, try to lose weight to factory settings:

1. Remove the batteries.
2. Press the power button (located under the battery compartment cover).
3. Insert the batteries back, holding the button for 10 seconds until the indicator blinks.

7. Update of the firmware of the scales

Xiaomi periodically releases firmware updates for scales that improve measurement accuracy and fix connection errors.To update Mi Body Composition Scale 2:

1. Make sure the scales are connected to the Mi Fit and are near the iPhone.
2. Open the section Profile in the application → Mi Body Composition Scale 2 → Update of the PO.
3. If a new version is available, click Update and wait for the process to complete (don’t step away from the scales!).

Important:

• 🔋 Make sure the batteries are at least 50% charged – if they run out during the upgrade, the scales could fail.
• 📶 Connect iPhone to Wi-Fi – Update via mobile Internet may interrupt.
• ⏳ If the update takes more than 5 minutes, don't try to reset the scales.

⚠️ Note: After updating the firmware, the scales may show incorrect data once (for example, weight 0 kg.

8. Alternative ways of connecting

If you can’t connect scales through Mi Fit, there are two alternatives:

Method 1: Through the Apple Health App

Some users report that scales start syncing with Apple Health even without the Mi Fit if:

• The scales were already connected to another device (Android/iPhone) And they have a profile saved.
• The iPhone includes Bluetooth and background activity for Apple Health.

However, this method is unstable and does not guarantee the transmission of all 13 indicators.

Method 2: Through third-party applications

Apps like Health Sync or Synchronoss can transfer data from Mi Fit to Apple Health if standard sync doesn't work.

• ⚠️ These apps require access to a Xiaomi account, which may not be secure.
• 💰 Some functions are paid.
• 🔄 Synchronization can occur with a delay.

We recommend using these methods only as a last resort, as they do not guarantee stable operation.

FAQ: Frequent questions