Introduction
The Runstar Smart Scale is designed to provide comprehensive body composition analysis, helping you monitor and track your health and fitness progress. This digital bathroom scale offers high accuracy and integrates seamlessly with the Starfit App, allowing for detailed data tracking and synchronization with other popular fitness platforms.

Image: Front view of the Runstar Smart Scale in white, showing its LCD display and examples of the accompanying mobile app interface on a smartphone and smartwatch.
What's in the Box
- 1x Runstar Body Weight Scale (Model FG2210W)
- 3x AAA Batteries
- 1x User Manual
Setup Guide
Initial Setup
- Remove the insulator strip from the battery compartment located on the underside of the scale.
- Place the scale on a hard, flat surface. Avoid carpets or uneven flooring for accurate measurements.
- Lightly step on the scale to activate it. The display will show "0.0" or "0.00" indicating it's ready for use.
App Installation and Pairing (Starfit App)
To unlock the full body composition analysis features, download and pair the Starfit app:
- Download the "Starfit" app from the App Store (iOS) or Google Play (Android).
- Register for a new account or log in if you already have one.
- Ensure Bluetooth is enabled on your smartphone.
- Open the Starfit app and navigate to the "My Devices" or "Measure" section.
- The app will search for the scale. When "Runstar-RX" (or similar) appears, tap to connect.
- Once connected, a Bluetooth icon will appear on the scale's display.
- For the first measurement, ensure the app is open and connected. Subsequent measurements can be taken offline and will sync automatically when the app is next opened.

Image: A visual guide demonstrating the four easy steps to set up the Runstar Smart Scale: Register with Starfit, Add Personal Data, Connect with the scale with Bluetooth on, and Start to Use.
Operating Instructions
Taking a Measurement
- Ensure the scale is on a hard, flat surface.
- Step onto the scale with bare feet. Your feet should make contact with all four electrode pads for accurate body composition readings.
- Stand still on the scale until your weight is displayed and the app (if open) shows the full analysis.

Image: A woman in a yoga pose, with the Runstar Smart Scale in the foreground, illustrating the scale's ability to analyze 13 body composition data points including Weight, Body Fat, BMI, Muscle, Water, and Bone Mass.
Understanding Display Readings
The Runstar Smart Scale's large LCD display shows 6 key measurements directly:
- Weight
- Body Fat Rate
- BMI (Body Mass Index)
- Muscle Mass
- Body Water Rate
- Bone Mass
For all 13 body composition metrics and historical data, refer to the Starfit app.

Image: A comparison graphic showing the Runstar Smart Scale's user-centered design, including display of 6 essential data points, dual-frequency BIA method, long battery life, and 6mm tempered glass, contrasted with generic scales.
Using the Starfit App
The Starfit app provides a comprehensive overview of your health data:
- 13 Body Composition Metrics: View detailed data including Weight, BMI, Body Fat, Fat-free Body Weight, Subcutaneous Fat, Visceral Fat, Water, Muscle Mass, Bone Mass, Protein, BMR, and Body Age.
- Historical Tracking: Monitor your body data over time (weeks, months, years) through intuitive charts and graphs.
- Data Synchronization: The app easily syncs with Apple Health, Health Connect, and Fitbit for integrated health management.

Image: A woman using the Starfit app on her smartphone, with app screenshots showing data tracking and synchronization capabilities with Apple Health, Health Connect, and Fitbit logos.
Multiple User Profiles
The Starfit app supports up to 24 user profiles, making it ideal for families. The scale can intelligently recognize different users and automatically assign measurements to the correct profile.

Image: A family interacting, with a graphic overlay showing the Runstar Smart Scale supporting multiple user profiles (Mother, Father, Brother) within the app.
Maintenance
Cleaning
To clean the scale, wipe it with a damp cloth and mild detergent. Do not use abrasive cleaners or immerse the scale in water.
Battery Replacement
The scale uses 3 AAA batteries. When the battery indicator appears on the display, replace all three batteries with new ones. Ensure correct polarity when inserting the batteries.
Troubleshooting
Common Issues & Solutions
- No Display: Check if the insulator strip has been removed from the battery compartment. Ensure batteries are correctly inserted and have sufficient charge.
- Inaccurate Readings: Ensure the scale is placed on a hard, flat surface. Avoid carpets. Make sure you are standing still and making full contact with the electrode pads with bare feet.
- "Lo" on Display: Indicates low battery. Replace batteries immediately.
App Connectivity Issues
- Scale not connecting to app:
- Ensure Bluetooth is enabled on your phone.
- Make sure the Starfit app has Bluetooth permissions enabled in your phone's settings.
- Restart the Starfit app and try connecting again.
- Step on the scale to activate it before attempting to connect via the app.
- Data not syncing: Ensure the app is open and connected to the scale after taking offline measurements. Check your phone's internet connection for cloud synchronization.
Specifications
| Product Dimensions | 12 x 10 x 2 inches; 3.44 Pounds |
| Item Model Number | Z2210 |
| Batteries | 3 AAA batteries (included) |
| Weight Capacity | 400lb / 180kg |
| Accuracy | 0.2lb / 100g |
| Display Type | LCD |
| Body Composition Metrics | 13 (Weight, BMI, Body Fat, Fat-free Body Weight, Subcutaneous Fat, Visceral Fat, Water, Muscle Mass, Bone Mass, Protein, BMR, Body Age) |
| App Compatibility | Starfit App, Apple Health, Health Connect, Fitbit |

Image: An exploded view of the Runstar Smart Scale's internal components, emphasizing the 4 high-precision G-shape sensors and the durable 6mm tempered glass for high accuracy and safety.
Warranty and Support
For warranty information and customer support, please refer to the contact details provided in the product packaging or visit the official Runstar website.
You can also find answers to frequently asked questions on the Runstar brand store: Runstar Brand Store