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Screenshots

  • Scale Relay: Smart Scale Sync screenshot 1
  • Scale Relay: Smart Scale Sync screenshot 2
  • Scale Relay: Smart Scale Sync screenshot 3
  • Scale Relay: Smart Scale Sync screenshot 4

About Scale Relay: Smart Scale Sync

Get your smart scale's weigh-ins into Garmin Connect, straight from your iPhone. Two ways in, one tap out. APPLE HEALTH ROUTE: ANY SCALE If your scale's app saves weight to the Health app, Scale Relay picks it up and sends it to Garmin Connect. Works with Withings, Renpho, Eufy, Etekcity, Zepp Life, Wyze, Picooc and any other app that writes weight to Apple Health. Body fat and BMI come along when your scale's app provides them. With the Sync to Garmin action in Shortcuts, an automation can send new weigh-ins without opening the app. BLUETOOTH ROUTE: XIAOMI SCALES, NO OTHER APP NEEDED Step on a Mi Body Composition Scale 2 or a Xiaomi Body Composition Scale S400 and Scale Relay reads the measurement directly: weight, body fat, muscle mass, bone mass, water, BMI and BMR. It can also save each weigh-in to Apple Health. The S400 needs a one-time authorization with your Xiaomi account. WHAT YOU GET • A preview of every weigh-in before it is sent; nothing leaves without your tap or your Shortcut • Body composition in Garmin Connect, not just the weight • Bluetooth weigh-ins saved to Apple Health too, if you turn it on • A Sync to Garmin action for Shortcuts and automations • Weigh-ins from the last 7 days are included; Garmin Sync unlocks older history • One Garmin sign-in, two-factor authentication supported • A "Sent to Garmin" list so you know what arrived FREE TO TRY Your first two syncs are free on either route. Unlimited syncing is a single one-time purchase called Garmin Sync. No subscription. PRIVACY FIRST Your measurements stay on your iPhone and go only to your own Garmin account and, if you choose, to Apple Health. No Scale Relay account, no tracking, no ads. REQUIREMENTS • iOS 17 or later • A Garmin Connect account • Apple Health route: any scale app that writes weight to the Health app • Bluetooth route: Mi Body Composition Scale 2 or Xiaomi Body Composition Scale S400 Scale Relay is an independent app. It is not affiliated with, endorsed by or associated with Garmin, Xiaomi, Withings, Renpho, Eufy, Etekcity, Zepp, Wyze, Picooc or any other scale or fitness-platform maker. Product names are trademarks of their respective owners.

What’s new

Version 1.4 · Updated October 10, 2026

• Save weigh-ins to Apple Health. Turn it on in Settings and every weigh-in from your Mi Body Composition Scale 2 or S400 is also saved to the Health app. Weight and BMI are free; body fat and lean body mass come with Garmin Sync. • Sync to Garmin from Shortcuts. A new action sends your new Apple Health weigh-ins to Garmin Connect without opening Scale Relay. Add it to an automation, for example every morning after you weigh in, or when your scale's app closes. • Clearer wording on the Health tab and smaller fixes.

App privacy

The developer, Marcin Naglik, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Scale Relay: Smart Scale Sync

Looking for apps like Scale Relay: Smart Scale Sync? Here are 6 similar apps on the App Store. The highest rated is AirWeight for Bluetooth Scales (3.5/5), and 3 of the 6 are free to download.

Scale Relay: Smart Scale Sync vs. alternatives
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Scale Relay: Smart Scale Sync – Free October 10, 2026
ScaleSynch - Sync Your Weight – Free Oct 15, 2026 Compare
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Fitcontext - Training Export – 0.99 USD Aug 28, 2026 Compare
AirWeight for Bluetooth Scales 3.5 / 5 (6) 3.99 USD Sep 21, 2026 Compare
NeckSense – Free Oct 28, 2025 Compare

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