Apple Health, Google Fit or Fitbit: Which Hub Should Own Your Weight Data?

Which health app should hold your weight and body composition data? An honest comparison of Apple Health, Google Fit and Fitbit for smart scale users.

For weight and body composition, Apple Health carries the most detail, Google Fit reliably carries weight but thins out the rest, and Fitbit is the best bridge into MyFitnessPal. Your phone’s operating system already decides most of it. The one insurance policy that outlasts any platform choice is a CSV export you control. Here is how to pick.

Why the hub choice matters more than it looks

Your scale is not really the thing you live in day to day — the health app is. It is where your weight sits next to your activity, where a calorie app reads your latest figure, and where your history survives when you eventually change scale brands. Pick the wrong hub and you either lose composition detail or trap your data somewhere awkward to leave. The Arboleaf scale syncs natively to all three of the main platforms, so the decision is genuinely yours rather than forced by the hardware. What follows assumes that native sync; the step-by-step for each is in our sync guide.

Apple Health — the richest home for composition

On an iPhone, Apple Health is the natural and best answer. It accepts not just weight but body fat percentage, BMI and lean body mass as distinct, first-class data types, so the full body-composition picture from an 8-electrode weigh-in actually lands somewhere useful. It reads those figures out to whatever calorie, training or coaching app you connect, and it keeps a tidy longitudinal record.

The one gotcha is per-metric permissions. Apple Health enables each data type separately, so if you allowed only weight during setup, body fat will never appear until you switch it on in iPhone Settings → Health. New owners routinely mistake that for a broken sync. If you are on iOS, this is the hub to build around.

Google Fit — dependable for weight, thinner for the rest

On Android, Google Fit is the default plumbing and it does the core job well: weight flows in reliably and becomes available to the wider Android health ecosystem. The honest limitation is depth. Fit’s own data model is leaner than Apple Health’s, so body-composition detail arrives thinner — weight is dependable, the granular composition metrics less so. That is a constraint of Fit, not of the scale.

For most Android users this is still the right hub, precisely because it is the ecosystem junction. Just do not expect it to hold the same composition richness Apple Health does, and lean on the scale’s own app plus CSV export for the detail Fit drops.

Fitbit — the MyFitnessPal bridge

Fitbit is worth choosing for one strategic reason beyond Fitbit devices themselves: it is one of the cleanest routes into MyFitnessPal, which reads weight from a linked Fitbit account reliably. If MyFitnessPal is your food-logging home, a Fitbit connection is often the smoothest way to keep your weight goal updating automatically. It works across both phone platforms, so it is a sensible add-on connection rather than an either/or.

MyFitnessPal and Samsung Health — second hops, not direct

Neither links to the scale directly, and it is better to say so than imply seamlessness:

• MyFitnessPal takes weight second-hand — link it to Fitbit, or to Apple Health on iPhone or Google Fit on Android. The chain is scale to app to platform to MyFitnessPal.
• Samsung Health reads from Google Fit-connected sources through Health Connect on recent Android versions; on iPhone, Apple Health is the junction.

Bridged syncs add a little delay. If a number seems missing, open the intermediate app first — it is usually sitting there waiting to hop.

Garmin — the honest exception

If you own a Garmin, brace for friction, because there is no official route for third-party scale weight into Garmin Connect. Community reports are consistent: Connect does not import weight from Android’s Health Connect, the Apple Health import path has been unreliable, and enabling certain Garmin nutrition features has been reported to sever existing third-party scale links. The realistic answer for most Garmin owners is manual weight entry — thirty seconds after a weigh-in — while body composition stays in the scale app. We lay out the full set of workarounds honestly in the Garmin section of our sync guide rather than promising support that does not exist.

When you switch ecosystems, CSV is your insurance

Here is the point every hub comparison should end on but few do: platforms change, phones change, and one day you may leave the ecosystem you picked today. That is exactly why your data should never live only inside someone else’s app. The Arboleaf app exports your complete history as a CSV — History → Export — to email, files, or wherever you keep records, with no subscription gate. That file is your portable, platform-independent copy: change from iPhone to Android, or drop one health app for another, and your years of readings come with you. What the export contains and what you can do with it is on our data features page, and if you care how the sync connections handle your data, our privacy explainer covers the opt-in, scoped, reversible model each platform uses.

The short answer

On iPhone, build around Apple Health and enable every composition metric. On Android, use Google Fit for the plumbing and lean on CSV for detail. Add Fitbit if MyFitnessPal matters. Own a Garmin and you are manually entering weight — sorry, that is Garmin’s wall, not your scale’s. Whichever you choose, export a CSV now and then so no single platform ever owns your history. One last human note: however you wire your data up, the figures are there to inform you, not to referee your mood — if a daily number ever bothers you more than it helps, look at it less often. Full per-platform troubleshooting lives in our FAQ.