Trendline is an iPhone app that reads Apple Health. Everything below assumes an iPhone; the destination for your readings is Apple Health, which Android does not run.
What this page can and can't promise
Every brand page on our smart-scale index works from vendor documentation first. Amazfit gives us almost none to work from. On July 20, 2026, the entire official support offering for the Amazfit Smart Scale was two items — a user guide and an EU declaration of conformity (Amazfit support) — and the user guide does not mention Apple Health once. The Zepp app's App Store listing, read the same day, doesn't mention Apple Health, HealthKit, scales, or weight tracking anywhere in its description either. Even Etekcity, our previous thinnest paper trail, at least prints "Apple Health" on a product page. So this page is mostly an exercise in labeling: a small documented core, a community-documented layer, and a set of plain unknowns we refuse to fill with guesses.
Which app? Zepp vs. Zepp Life
Two similarly named apps, both from Zepp Inc., serve different hardware families — the same naming trap our Xiaomi page untangles from the other side:
- Zepp (App Store) — "the official app for Amazfit," per its own listing. This is the app the Amazfit Smart Scale's user guide points at — its setup instruction is to open the Zepp app, register or sign in with an account, and pair the scale following the on-screen prompts (user guide). If your scale says Amazfit, you're here — and note the vendor's own instructions assume a Zepp account.
- Zepp Life (formerly Mi Fit; App Store) — the Xiaomi-lineage app, which lists the Mi Body Composition Scale and Mi Scale among its devices and states, in its listing's own words, "This App version supports using Apple Healthkit within app." If your scale says Mi or Xiaomi, that page is your path, not this one.
The confusion is understandable — one developer, two ecosystems, one shared word in the names. Checking which app your manual actually names is worth doing before any troubleshooting.
What Amazfit does document
The scale itself is reasonably specified: the user guide's symbol legend covers weight plus body fat rate, muscle mass, body water percentage, protein percentage, bone mass, visceral fat grade, basal metabolism, subcutaneous fat, skeletal muscle, BMI, physical age, and heart rate — a dozen-plus readouts, most with no Apple Health type. What's specified stops at the Zepp app's front door. The only official sentence we could find connecting the Zepp app to Apple Health at all sits in a smartwatch support article, which says: "For Apple Health/Google Fit, please add Zepp app as the data source in them" (Amazfit GTS 2 Mini support doc). That's watch data, not a scale spec — and no official Amazfit or Zepp document we could locate says which scale measurements, if any, the Zepp app writes to Apple Health. We looked; we're telling you the search came up empty rather than papering over it.
Turning the sync on
Here's the portion that's verifiable, tier by tier:
- OS-level (solid): if Zepp requests Health access, iOS shows the standard permission sheet listing each data type the app wants to write — that sheet, whenever it appears, is the most authoritative type list you'll get. The switches afterward live in Apple Health (profile icon → Apps → Zepp) and in iPhone Settings → Apps → Health → Data Access & Devices (Apple's guide).
- Community-documented (label it as such): third-party walkthroughs put the in-app connection under the Zepp profile tab's accounts section — StepsApp's guide gives it as Profile → Add accounts → Health; other walkthroughs name the same area "Accounts & Permissions," and the label appears to vary by app version. None of this is vendor specification, and all of it was written about watch data.
- Undocumented: whether enabling that connection carries scale readings — and which of them — is stated nowhere official we can cite. Of the scale's readouts, only weight, BMI, and body fat rate even have Apple Health types to land in; the rest would stay in Zepp regardless of any toggle.
What lands where
| What Zepp writes to Apple Health | What Apple Health can store | What Trendline reads from Health |
|---|---|---|
| Undocumented for scale data. The Zepp listing makes no HealthKit statement, and no vendor doc enumerates data types; the one official Apple Health sentence covers watch data (support doc). Of the scale's readouts, only weight, BMI, and body fat rate have Health equivalents at all. | Weight, BMI, body fat %, lean body mass, height, waist circumference. No types exist for muscle mass, body water, bone mass, protein, visceral fat, or the rest of the scale's readouts. | Weight, body fat %, and lean body mass (height as context). BMI and waist are not imported — BMI is derivable, and neither carries trend information Trendline needs. |
When Trendline launches, it will also accept manual entries — including composition values Apple Health has no type for, like visceral fat and body water — so a thin (or unverifiable) sync needn't mean a thin record.
When sync stalls
With no vendor troubleshooting doc for the scale, the reliable sequence is the generic HealthKit one, cheapest step first:
- Check the reading exists in Zepp at all. If the weigh-in never left the scale, the problem is pairing, not Health — re-pair the scale in the Zepp app before touching permissions.
- Confirm the write permissions in Health → profile → Apps → Zepp, every category you care about switched on. A reinstall or iOS update can silently reset these.
- Rebuild the in-app Health connection from the profile tab's accounts section — disconnect, reconnect, and answer the iOS permission sheet again.
And the boundary no vendor states for you: readings flow from the day you enable the connection, forward. Nothing in Amazfit's or Zepp's documentation says whether past weigh-ins transfer to Apple Health when you first grant access — so we don't claim it either way. If your Zepp history predates the toggle, check Health after enabling rather than assuming.
Try the idea
Whatever your sync situation turns out to be, the trend question doesn't have to wait for it. Paste a few weeks of weigh-ins — from Zepp, from Health, or from a notebook — into the free weight trend calculator. It runs in your browser, nothing uploads, and it draws a deliberately slower signal next to your raw measurements. Daily numbers vary for reasons that have nothing to do with progress; the slower line is the readable one.
Sources
- App Store: Zepp (no HealthKit or scale statement in the listing)
- Amazfit support: Smart Scale page (user guide + EU declaration only)
- Amazfit Smart Scale user guide (setup, readout legend; no Apple Health mention)
- Amazfit support (GTS 2 Mini): sync to Strava / Apple Health / Google Fit
- App Store: Zepp Life (formerly Mi Fit)
- StepsApp: connecting an Amazfit via the Zepp app (community-documented path)
- Apple: view your health data on iPhone
Trendline is not affiliated with or endorsed by Amazfit, Zepp Inc., or Zepp Health. Vendor behaviors change — and this vendor documents less than any brand we've covered; this page states what was verifiable against the sources above on July 20, 2026, and labels community walkthroughs as community walkthroughs.