Sync any smart scale to Garmin Connect on iPhone | Scale Relay

Any scale, through Apple Health

Most smart scales already save weigh-ins to the Health app through their own companion app. Withings, Renpho, Eufy, Etekcity, Zepp Life and many others do. Scale Relay reads what is there and relays it to Garmin Connect.

• Weight, plus body fat and BMI when the scale's app provides them
• Weigh-ins from the last 7 days are included when you connect
• Older history is included with the one-time purchase
• Every send is a tap in the app; there is no background sync
• Read-only: Scale Relay never writes to Apple Health

A Xiaomi scale, over Bluetooth

For the Mi Body Composition Scale 2 and the Xiaomi Body Composition Scale S400, Scale Relay talks to the scale itself. No Xiaomi cloud for the Scale 2, and no MAC address or encryption key to type in for the S400.

• Body fat, muscle mass, water, bone mass, BMI and BMR
• Calculated on your iPhone, not on a server
• Works without the Xiaomi Home or Zepp Life app open
• Keep the app open while you weigh

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Xiaomi Body Composition Scale S400

Encrypted measurements decoded on your phone after a one-time Xiaomi authorization. No MAC address or key to type in.

Supported

Mi Body Composition Scale 2

The scale broadcasts, Scale Relay listens. No pairing, no Xiaomi account, body composition calculated on the phone.

01

Weigh yourself

Step on your scale as usual. With a Xiaomi scale, keep Scale Relay open and it reads the measurement directly.

02

Open Scale Relay

On the Health tab it shows the new weigh-ins your scale's app saved to Apple Health. Nothing is sent until you decide.

03

Send to Garmin

Review weight and whatever body composition is available, then send it to Garmin Connect. Two-factor sign-in is supported.

Why doesn't Garmin Connect read my weight from Apple Health?

Today Garmin Connect writes to Apple Health but does not read weight from it, so the weigh-in your scale's app saved stops there. Scale Relay reads it from Health and sends it to Garmin Connect, with body fat and BMI when your scale's app recorded them.

I linked MyFitnessPal and my weight still doesn't reach Garmin.

The scale app → Apple Health → MyFitnessPal → Garmin chain carries weight only and often needs MyFitnessPal opened to fire; some users report it stopping after enabling Garmin's own nutrition tracking. Scale Relay sends directly and keeps a "Sent to Garmin" list so you know what arrived.

Is it automatic?

No. New weigh-ins wait on the Health tab and you tap Send. Nothing leaves your phone without that tap, the same weigh-in is never sent twice, and you see what Garmin accepted.

Will body fat show up in Garmin, or only weight?

Weight, plus body fat and BMI when your scale's app wrote them to Health. With a Mi Body Composition Scale 2 or Xiaomi S400 over Bluetooth also muscle, water, bone mass and BMR.

Does my Garmin password leave my phone?

It goes to Garmin's sign-in only, straight from your iPhone, and is not stored. Scale Relay keeps the session token in the iOS Keychain. There is no Scale Relay account and no Scale Relay server.

Does it work with Garmin two-factor authentication?

Yes. Enter the code from your email or authenticator app when Garmin asks. You sign in once; the session is kept until you sign out.

Any scale

Apple Health to Garmin Connect

Withings, Renpho, Eufy, Etekcity, Wyze, Picooc, Zepp Life: how each app writes to Health, what is transferred, and the alternatives.

Scale 2

Mi Body Composition Scale 2 to Garmin Connect

Profile setup, weighing, Garmin sign-in with two-factor codes, what is transferred, troubleshooting.

S400

Xiaomi S400 to Garmin Connect

One-time Xiaomi authorization, why Xiaomi Home must be closed while weighing, what to do after re-pairing.

Compare

Every way to get a Xiaomi scale into Garmin

MiScale Exporter, export2garmin, SmartScaleConnect, MyFitnessPal, manual entry and the Garmin Index S2, compared honestly.