Smart scale guide
How to track Mi Body Composition Scale readings
Scale Metrics receives a stable reading from a compatible Xiaomi scale over Bluetooth, stores it on your iPhone, and places it beside your earlier measurements.
What is Scale Metrics?
Scale Metrics is an iPhone app that records weight and body composition from compatible Xiaomi Mi Body Composition scales. It focuses on measurement history and trends, works without an account, and keeps your health data private on your device.
How do you record a measurement?
- Open Scale Metrics. Open the app on an iPhone running iOS 17 or later.
- Step onto the scale. Use a compatible Xiaomi Mi Body Composition scale and wait for the reading to stabilize.
- Review and compare. Review the saved measurement, then compare it with your history and trends.
Apple's Core Bluetooth framework allows iPhone apps to communicate with Bluetooth Low Energy devices. Scale Metrics uses that connection for compatible scale readings, then stores the resulting record locally.
What measurements can the app show?
Available values depend on the data supplied by the scale and your profile. Scale Metrics can present:
- Weight and BMI
- Body fat and body water estimates
- Muscle mass and bone mass estimates
- Visceral fat, protein, basal metabolic rate, and body age estimates
- A body score and metric-level insights
How should smart-scale estimates be interpreted?
Treat body composition values as estimates and look for patterns across repeated measurements. Bioelectrical impedance results depend on the device, prediction equation, individual characteristics, and measurement conditions.
A 2024 systematic review found that appropriate prediction equations depend on factors including device, age, ancestry, health status, physical activity, and sex. Earlier review evidence also found that longitudinal measurements under consistent conditions are more useful than isolated estimates.
How does the scale sync with the app?
When you step on your compatible Xiaomi scale with bare feet, the scale measures your weight and impedance and broadcasts the data over Bluetooth Low Energy. Scale Metrics receives the broadcast in seconds and saves it directly to your iPhone.
View Scale Metrics on the App Store ↗