Sync Your Smart Scale with Apple Health

Getting a smart scale to sync with Apple Health should be simple, but permissions and app settings can make the setup confusing. For most people, the first connection takes under five minutes.

This guide covers Renpho, Withings, Eufy and Garmin, plus how to display weight in stone and fix common sync problems. Use our kg to stone converter for any reading you want to convert.

Which Smart Scales Work with Apple Health?

The Garmin Index S2 is the main exception. Garmin Connect can sync activity data to Apple Health, but it does not natively write body-composition data.

If Apple Health integration is important, Renpho, Withings or Eufy may be a better fit.

How to Connect Renpho to Apple Health

Renpho connects to Apple Health through the Renpho Health app.

Step 1: Download the Renpho Health app. Open the App Store, install Renpho Health, then create an account or log in.

Step 2: Set up your scale. Follow the in-app instructions to pair the scale by Bluetooth and take your first reading.

Step 3: Enable Apple Health. In Renpho Health, open Profile, Connected Apps or Integrations, then Apple Health. Allow Weight and any other metrics you want to sync.

Step 4: Verify the sync. In Apple Health, open Browse, Body Measurements and Weight. Take a new reading if it does not appear immediately.

Note: Renpho scales do not support stone display — they show kilograms or pounds only. If you think in stone, convert readings with our kg to stone converter.

How to Connect Withings to Apple Health

Install Health Mate by Withings and follow the in-app instructions to connect your scale.

In Health Mate, open Profile, Apps and Devices, then Apple Health. Allow Health Mate to write Weight, Body Fat Percentage and BMI if you want those metrics available.

Check Apple Health under Browse, Body Measurements and Weight. Withings Wi-Fi scales can sync even when your phone is not nearby.

To display stone, open Health Mate, go to Profile and Preferences, then select Stone and Pounds.

How to Connect Eufy Smart Scale to Apple Health

Install Eufy Health, create an account and pair the scale using Bluetooth. Keep your iPhone within range during weigh-ins.

In Eufy Health, open Profile, Connected Services and Apple Health. Enable the integration and grant the permissions you need.

Check Apple Health under Browse, Body Measurements and Weight after your next weigh-in.

Changing Weight Units in Apple Health

UK iPhones typically display kilograms. To change the display, open Settings, General, Language and Region, and set Region to United Kingdom.

You can also open a weight reading in Apple Health and use the unit selector on the graph to switch between kg, stone and pounds.

For height-based context, use our BMI calculator. For conversion, use our kg to stone converter.

Fixing Common Sync Problems

Renpho is not syncing. Check iPhone Settings, Privacy and Security, Health, then Renpho. Enable Write permission for Weight and take a new reading.

Withings data is missing. Check Wi-Fi credentials in Health Mate after a router change, then confirm Apple Health permissions.

Apple Health shows kg instead of stone. Check the iPhone region settings and use the unit selector on the weight graph.

The scale paired but sends no data. For Renpho and Eufy, enable Bluetooth and stay within range. For Withings, check the scale’s Wi-Fi connection.

Syncing worked before but stopped. This is common and usually fixed by opening the manufacturer’s app on your phone and letting it refresh. The data should then reach Apple Health. Also check that iOS has not revoked Health permissions after an app update.

Duplicate weight entries in Apple Health. This happens when two apps both write weight data (for example, the scale app and a fitness app). In Apple Health, go to Browse, Body Measurements, Weight, then Data Sources and Access, and set the priority order so your scale’s app is first.

Body fat shows in the scale app but not Apple Health. Check that you granted permission for each data type individually. Weight permission alone does not include body fat percentage or BMI. Re-open the permission screen and enable all categories you want.

How Apple Health Sync Works

Smart scales do not send data directly to Apple Health. Instead, the scale syncs to its own companion app first (Health Mate, Renpho Health, EufyLife, or Garmin Connect), and that app then passes the data to Apple Health. This two-step process matters because each link in the chain can break.

Wi-Fi vs Bluetooth makes a real difference. Wi-Fi scales like the Withings Body Smart sync automatically whenever they have a connection, even if your phone is in another room. Bluetooth scales like the Renpho Elis 1 need your phone nearby with the app open (or running in the background) to transfer each reading.

Multi-user households need attention. If two people share one scale, each person's readings go to their own companion app account. Apple Health on your iPhone will only receive data from the account signed in on that phone, so make sure each family member uses their own login.

Onboard memory helps. Most scales store several weigh-ins internally and sync them later when the connection is available. This means you can weigh yourself without your phone and the data will still reach Apple Health on the next sync.

How Apple Health Uses Your Weight Data

Apple Health can calculate BMI when you have entered your height, and it shows daily, weekly, monthly and annual weight trends.

Other apps can use the data only when you grant permission. Health data is stored on your iPhone and backed up to iCloud when Health backup is enabled.

How to Read Synced Weight Data

Use similar measurement conditions when comparing readings. Hydration, meals and clothing can cause short-term variation, so a repeated trend is usually more useful than one change.

Apple Health data is not a diagnosis. Use the BMI calculator for height-based screening context.

Best Smart Scale for Apple Health Users

The Withings Body Smart (£89.95) offers the smoothest Apple Health experience. Its Wi-Fi connection syncs automatically without needing your phone nearby, and the Health Mate app passes weight and body-composition data to Apple Health reliably. Stone display is also supported for UK users.

On a budget, the Renpho Elis 1 syncs well with Apple Health over Bluetooth, though your phone must be nearby during weigh-ins. Note that Renpho does not support stone display, so you will see kg or lb in Apple Health unless you convert.

How We Evaluated Apple Health Compatibility

We checked each scale's Apple Health integration based on manufacturer documentation and app store descriptions, verified in October 2026. Withings and Renpho both offer direct Apple Health sync. Eufy syncs through the EufyLife app. Garmin Index S2 does not natively sync body composition to Apple Health. We did not physically test each integration.

Which Scale Should You Buy for Apple Health?

Best overall for Apple Health: Withings Body Smart (£89.95, Wi-Fi auto-sync, stone display). Best budget: Renpho Elis 1 (Bluetooth sync, no stone). Best value with heart rate: Eufy P2 Pro (£54.99). Avoid for Apple Health: Garmin Index S2 (no native body-composition sync).