Trendline is an iPhone app that reads Apple Health. Everything below assumes an iPhone; the destination for your weigh-ins is Apple Health, which Android does not run.
Who makes what
Weight Gurus scales are a Greater Goods, LLC product, and the app that serves them is Weight Gurus (4.4 stars, about 1K ratings when we checked — a modest count for an app this old, which says more about its niche than its quality). Greater Goods publishes other apps too, including one called Balance Health; every scale setup guide we read on greatergoods.com points scale owners at Weight Gurus, so that's the app this page covers. Unlike most brands in this cluster, Greater Goods maintains real, public support pages per scale model — a genuine outlier among the app situations we've cataloged — and answers its own support email and phone line in the app's review responses.
Three ways a reading travels
Greater Goods documents three distinct connection modes across its scale line (weightgurus.com), and which one your scale uses changes your habits more than any setting:
- Wi-Fi: the scale sends results through your home network to your account's cloud — the vendor states no phone is required after setup. Per the Wi-Fi scale guide, a missed sync isn't lost: the scale beeps three times, stores the measurement, and attempts again the next time you weigh.
- Bluetooth: the vendor's own two-step description is: open the app on your smartphone, then stand on your scale. The open-app habit isn't folklore here — it's the published procedure, same as the eufy open-app catch.
- AppSync: the no-radio fallback — weigh, then scan the scale's display with your phone camera to capture the reading into the app.
In every mode the reading lands in the Weight Gurus app first; Apple Health is the next hop.
Turning Apple Health sync on
Vendor-documented, from the model support pages: "The Weight Gurus app integrates with Apple® Health, MyFitnessPal®, Fitbit®, and Google Fit®" — to manage integrations, open the app, choose the Integrations section, and toggle the platforms you want (Greater Goods support). The vendor's pages place that section in the Settings menu on one page and the side menu on another — wording that predates the 2026 redesign on at least one of them — so expect to hunt for a moment; the section name is the stable part. The App Store listing states the result plainly: "Automatically share data with Apple Health, Fitbit and MyFitnessPal." iOS will show its standard permission sheet when you first connect; the switches live afterward in Apple Health (profile icon → Apps → Weight Gurus) and iPhone Settings → Apps → Health → Data Access & Devices (Apple's guide).
One vendor-documented rule matters for households: each person needs their own Weight Gurus account — two users can share a scale and even a phone, but each must log into their own account to sync their readings (Greater Goods support). If a family member's weigh-ins are missing, the account they were captured under is the first thing to check.
The 2026 overhaul, honestly
The app was rebuilt in 2026 — version 5.0.3 shipped in late June with the note "Improved Apple Health metric syncing," following a 4.0 release that described an overhauled HealthKit integration flow "with clear add, finish, and out-of-sync status prompts" (App Store listing). Owner reviews on the current listing are blunt about the redesign: recurring themes are graphs and dashboards that owners find harder to read than the old version's, one reviewer describing the Apple Health integration dropping until they disconnected and reconnected it, and long-running reports of composition metrics (body fat, muscle, water) capturing inconsistently across sessions. Greater Goods replies to these reviews with case numbers and says fixes are in progress — a better posture than most vendors here, and still a good argument for keeping your weigh-ins somewhere no redesign can touch. A reading that reached Apple Health before the overhaul reads exactly the same after it.
What lands where
| What Weight Gurus writes to Apple Health | What Apple Health can store | What Trendline reads from Health |
|---|---|---|
| Vendor-confirmed in general terms: automatic sharing with Apple Health (App Store listing; Greater Goods support). No official per-type list exists; the app itself tracks 12+ metrics, most of which — bone mass, BMR, metabolic age, visceral fat, protein — have no Apple Health type regardless. | Weight, BMI, body fat %, lean body mass, height, waist circumference. No types exist for water percentage, bone mass, visceral fat, or the rest. | 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 water percentage — so the metrics that stay in the Weight Gurus app needn't be lost to your record.
When sync stalls
Work the pipeline in order, cheapest link first:
- Scale → app: confirm the reading exists in Weight Gurus at all. On Wi-Fi models the scale's own indicators tell you — three short beeps mean a failed sync, and a data symbol on the display means measurements are stored and waiting (vendor guide). On Bluetooth models, repeat the weigh-in with the app open, since that's the vendor's stated procedure.
- App → Health: re-check the write permissions in Health → profile → Apps → Weight Gurus. Then toggle the Apple Health integration off and on from the app's Integrations section — the reconnect fix one current-listing reviewer describes, and the mechanism the vendor's own toggle design implies. The 4.0+ app also surfaces an out-of-sync status prompt of its own.
- Wrong account: readings captured under another family member's account sync to their record, not yours — the one-account-per-person rule above.
And the boundary we hold every vendor to: readings flow from the day you enable the integration, forward. Greater Goods does not document whether past weigh-ins transfer to Apple Health when you first connect — so we don't claim it either way. If your in-app history predates the toggle, check Health after enabling rather than assuming.
Try the idea
The Weight Gurus app can export your full history as CSV (per its listing) — which makes this easy: paste a few weeks of weigh-ins 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: Weight Gurus (Apple Health statement, version notes, current reviews)
- Greater Goods support: Body Composition Scale (Integrations FAQ — Settings menu path)
- Greater Goods support: AppSync Bathroom Scale (Integrations FAQ, one-account-per-person rule)
- Greater Goods support: Wi-Fi Smart Scale (setup, sync beeps, stored-measurement retry)
- weightgurus.com (connection modes, compatible platforms)
- Apple: view your health data on iPhone
Trendline is not affiliated with or endorsed by Greater Goods or Weight Gurus. Vendor behaviors change — this app changed a lot in 2026; this page states what was verifiable against the sources above on July 20, 2026, and labels owner reports as owner reports.