Privacy Policy
Body Scale Sync collects nothing. It has no server, no account and no analytics — your readings travel from your own Home Assistant instance to the Health app on your own iPhone, and never anywhere else.
What the app does
Body Scale Sync reads body measurements — weight, and where your scale reports them body fat, muscle mass and BMI — from a Home Assistant instance that you run and control, and writes them into Apple Health on your device.
Data the app stores on your device
- Your Home Assistant credential. Either a refresh token obtained when you sign in, or a long-lived access token you paste in. It is kept in the iOS keychain and is sent only to the address you entered.
- The address of your Home Assistant instance and which of its entities map to which measurement.
- A record of what has already been synced — the timestamp of the most recent reading per measurement, and any readings you deleted, so that a deletion is not undone by the next sync.
- Health data written by the app, which lives in Apple Health under your control, not in the app.
All of it stays on the device. None of it is transmitted to us, because there is no service of ours for it to be transmitted to.
Health data
The app writes measurements to HealthKit and reads back the entries it wrote, so the same reading is not stored twice. Health data is never used for advertising, never sold or shared, never used for anything beyond the sync described here, and never leaves your device.
Network connections
The app connects to exactly one address: the Home Assistant instance you configured. There are no third-party SDKs, no analytics, no crash reporting and no advertising networks in the app.
Deleting your data
Signing out inside the app removes the stored credential and asks Home Assistant to revoke the refresh token. Deleting the app removes everything else it stored. Measurements already written to Apple Health remain there and can be removed in the Health app, under Browse → the measurement → Show All Data.
Children
The app is not directed at children under 13 and collects no personal information from anyone.
Changes
If this policy changes, the updated version will be posted on this page with a new date.
Contact
Body Scale Sync is made by Dmitrii Titov. Questions about privacy: [email protected].