A smart scale that syncs to Apple Health means your weight and body composition update automatically — no manual logging required. This feeds directly into fitness apps like ScoreVitals, a free alternative to dedicated fitness trackers that uses weight stability as part of its daily scoring. Whether you own a Withings, Renpho, or Eufy scale, the setup follows the same basic pattern: scale connects to a companion app, and the app writes data to Apple Health.
Here’s how to set it up for each major brand.
How Do You Connect a Withings Scale to Apple Health?
Withings scales (Body+, Body Smart, Body Comp, Body Scan) use the Withings app (formerly Health Mate) as their companion app.
-
Install Withings app and pair scale
Download the Withings app and create an account. Pair your scale via Bluetooth following the in-app setup wizard.
-
Enable Apple Health in Withings app
In the Withings app, tap Share (or Profile → Settings → Health) → Apps → Health (the Apple Health option). Toggle it on.
-
Allow Withings data categories
Select which data categories to share. Enable at least Weight, BMI, and Body Fat Percentage. Tap Allow when iOS prompts for Apple Health permissions.
-
Weigh yourself with phone in range
Step on the scale with your phone nearby (Bluetooth range). The measurement uploads to the Withings app, which then pushes it to Apple Health.
-
Pull to refresh Withings after weigh-in
The Withings app does not reliably push data in the background. After each weigh-in, open the Withings app and pull down to refresh the home screen. This triggers the Apple Health write.
If you have a Wi-Fi-connected Withings scale, the measurement reaches Withings servers automatically — but the final step from the app to Apple Health still requires opening the app.
How Do You Connect a Renpho or Eufy Scale to Apple Health?
-
Set up Renpho Health app
Download Renpho Health and create an account. On first login, the app asks to connect to Apple Health — tap Allow and enable all categories. Pair your scale via Bluetooth through the app’s device setup. Keep the Renpho Health app open on your phone during each measurement.
The older “Renpho” app has been discontinued — make sure you’re using the current version. The scale transmits via Bluetooth, so the app must be active and within range; without it open, the scale stores up to 20 offline measurements that sync next time you open the app. Data that syncs: weight, body fat percentage, BMI, and lean body mass.
-
Set up EufyLife app
Download EufyLife, create an account, and pair your scale through the in-app setup. Go to EufyLife → Profile → Settings → Apple Health → toggle the connection on and grant all requested permissions. Weigh yourself with the EufyLife app open.
Data that syncs: weight, BMI, body fat percentage, height, and lean body mass. Like Renpho, detailed body composition metrics (muscle mass, bone mass, body water) stay inside the companion app because Apple Health lacks corresponding data fields.
What Should You Know About Smart Scale Data in Apple Health?
The companion app must be open (or recently opened) when you step on the scale. Bluetooth range is typically five to ten metres. If the app isn’t active during the weigh-in, data stays on the scale until the next app connection.
-
Weigh at the same time daily
Weigh yourself at the same time daily for the most meaningful trends. Morning, after using the bathroom and before eating, gives the most consistent readings.
Apple Health and ScoreVitals track the trend over time — a single reading is far less useful than a consistent daily habit.
Body fat percentage from consumer scales is approximate. Bioelectrical impedance analysis (BIA) in home scales has a margin of error of three to five percentage points. The value is in tracking the direction of change, not the absolute number.
Consistent weight data helps ScoreVitals complete your picture. Download ScoreVitals and let your scale contribute to the body composition pillar of your daily readiness score.