Best Smart Scale 2026: 6 Body-Fat Scales

Which one is right for you?

1★ Best PickA+Best OverallWithings Body Comp

The only scale in this comparison that measures vascular age (pulse wave velocity) alongside body fat, muscle mass, visceral fat index, and bone mass. The Withings app (formerly Health Mate) offers CSV export and API access, and syncs with Apple Health and, on Android, Health Connect (the Google Fit link ended in May 2024). Weakness: foot-to-foot BIA has the same accuracy limits for body fat percentage as cheaper scales; Withings was bought by Nokia in 2016 and bought back by its founder in 2018; it sits in the premium price tier.

The Withings Body Comp is the only scale in this comparison that measures vascular age via pulse wave velocity — a cardiovascular health metric that BIA alone cannot provide. Its app offers CSV export and API access, and it syncs with Apple Health and, on Android, Health Connect (the Google Fit link ended in May 2024). The foot-to-foot BIA for body fat has the same accuracy limits as cheaper scales.

Withings Body Comp

$229.95Price as of 2026-11-10

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Specifications▼

Metrics

Weight, BMI, body fat %, body water %, muscle mass, bone mass, visceral fat, basal metabolic rate, standing heart rate, vascular age, electrodermal activity (nerve health) score

Connectivity

Wi-Fi (802.11 b/g/n) + Bluetooth

Max capacity

200 kg (440 lb)

App

Withings (Health Mate)

User profiles

Up to 8 users (automatic recognition)

Power source

4 × AAA alkaline batteries (non-rechargeable, ~15–18 months)

Metrics

Weight, BMI, body fat %, body water %, muscle mass, bone mass, visceral fat, basal metabolic rate, standing heart rate, vascular age, electrodermal activity (nerve health) score

Connectivity

Wi-Fi (802.11 b/g/n) + Bluetooth

Max capacity

200 kg (440 lb)

App

Withings (Health Mate)

User profiles

Up to 8 users (automatic recognition)

Power source

4 × AAA alkaline batteries (non-rechargeable, ~15–18 months)

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2ABest for Garmin UsersGarmin Index S2

The strongest pick if you already use a Garmin device — body composition data appears directly in Garmin Connect alongside your activities, sleep, and recovery metrics, creating a single-platform health dashboard. Supports up to 16 users, useful for households with multiple Garmin users. Weakness: the ecosystem premium is only valuable if you use Garmin; for non-Garmin users, the Index S2 is a foot-to-foot BIA scale in the same accuracy class as the cheaper Eufy P2 Pro.

The Garmin Index S2's ecosystem advantage is real and specific: body composition data appears directly in Garmin Connect alongside activity, sleep, and HRV metrics — no third-party bridge needed. For households with multiple athletes, 16-user support is a genuine differentiator. For non-Garmin users, it's a foot-to-foot BIA scale in the same accuracy class as the cheaper Eufy.

Garmin Index S2

$199.99Price as of 2026-11-10

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Specifications▼

Metrics

Weight (lb/kg/st), BMI, body fat %, body water %, muscle mass, bone mass

Connectivity

Wi-Fi (2.4 GHz) + Bluetooth Low Energy / ANT

Max capacity

181.4 kg (400 lb)

App

Garmin Connect

User profiles

Up to 16 users

Power source

4 × AAA batteries (up to ~9 months)

Metrics

Weight (lb/kg/st), BMI, body fat %, body water %, muscle mass, bone mass

Connectivity

Wi-Fi (2.4 GHz) + Bluetooth Low Energy / ANT

Max capacity

181.4 kg (400 lb)

App

Garmin Connect

User profiles

Up to 16 users

Power source

4 × AAA batteries (up to ~9 months)

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4BBest Budget PickXiaomi Mi Body Composition Scale 2

The low-cost pick in this comparison: body fat, BMI, muscle mass, bone mass, and metabolic rate estimates via Bluetooth sync to Xiaomi's app (Zepp Life, formerly Mi Fit). The body fat trend data is useful even though the absolute number is a rough estimate. Weakness: Bluetooth-only requires phone nearby during measurement; foot-to-foot BIA with the same limits as the other scales here; Xiaomi's Mi Fit app was renamed Zepp Life, a reminder that apps change over multi-year data tracking.

At its budget price, the Xiaomi Mi Body Composition Scale 2 delivers body fat trend data that is useful even though the absolute number is a rough estimate — the direction of change over weeks matters more than any single reading. Bluetooth-only means your phone must be nearby during measurement, and Xiaomi's Mi Fit app was renamed Zepp Life, a reminder that apps change over multi-year tracking.

Xiaomi Mi Body Composition Scale 2

Specifications▼

Metrics

Weight, BMI, body fat %, muscle mass, body water %, protein %, visceral fat rating, bone mass, basal metabolism (13 body-composition metrics)

Connectivity

Bluetooth 5.0

Max capacity

150 kg (range 100 g – 150 kg)

App

Mi Fit / Zepp Life

User profiles

Up to 16 users

Power source

4 × AAA (1.5 V) batteries (up to ~12 months)

Metrics

Weight, BMI, body fat %, muscle mass, body water %, protein %, visceral fat rating, bone mass, basal metabolism (13 body-composition metrics)

Connectivity

Bluetooth 5.0

Max capacity

150 kg (range 100 g – 150 kg)

App

Mi Fit / Zepp Life

User profiles

Up to 16 users

Power source

4 × AAA (1.5 V) batteries (up to ~12 months)

Xiaomi Mi Body Composition Scale 2

Ultra-budget body fat tracking pick. Measures body fat, BMI, muscle mass, bone mass, and metabolic rate estimates via Bluetooth sync to Zepp Life (formerly Mi Fit); body fat trend data is useful even though absolute values can be off by several points. Bluetooth-only requires phone nearby during measurement; foot-to-foot BIA like the other scales here; the app was renamed from Mi Fit to Zepp Life, so check current app support before relying on it for multi-year tracking.

Not sold in your country

5B-Best Mid-Range ValueAnker Eufy Smart Scale P2 Pro

The pragmatic middle pick: Wi-Fi sync (no phone-nearby requirement once set up over Bluetooth), Apple Health integration, 16 metrics, and a clean app at a mid-range price. Anker has a Japan service presence (retail stores, direct customer service). Weakness: 16 metrics sounds comprehensive but most additional metrics beyond weight, body fat, and BMI are derived from the same foot-to-foot BIA signal through different regression equations, not independent measurements; Eufy Life app is less mature than the Withings app; on Android, check the app's current Health Connect support.

The Anker Eufy Smart Scale P2 Pro hits the pragmatic sweet spot: Wi-Fi sync (no phone-nearby requirement once set up over Bluetooth), Apple Health integration, and 16 body metrics at a mid-range price. Most of those 16 metrics are derived from the same foot-to-foot BIA signal — not independent measurements — but for the typical fitness tracker, weight and body fat trend data is what matters.

Anker Eufy Smart Scale P2 Pro

Specifications▼

Metrics

Weight, body fat, heart rate, BMI, muscle mass, bone mass, water, protein, BMR, visceral fat, body fat mass, lean body mass, body age, body type, skeletal muscle mass, subcutaneous fat (16 measurements)

Connectivity

Wi-Fi + Bluetooth (dual-mode)

Max capacity

180 kg (397 lb)

App

EufyLife

User profiles

Unlimited users

Power source

4 × AAA batteries (included)

Metrics

Weight, body fat, heart rate, BMI, muscle mass, bone mass, water, protein, BMR, visceral fat, body fat mass, lean body mass, body age, body type, skeletal muscle mass, subcutaneous fat (16 measurements)

Connectivity

Wi-Fi + Bluetooth (dual-mode)

Max capacity

180 kg (397 lb)

App

EufyLife

User profiles

Unlimited users

Power source

4 × AAA batteries (included)

Anker Eufy Smart Scale P2 Pro

Pragmatic middle pick. Wi-Fi sync after initial Bluetooth setup (no phone-nearby requirement afterwards), Apple Health integration (Health Connect on Android), 16 body metrics, EufyLife app; Anker sells and supports the product directly in Japan. Most additional metrics beyond weight, body fat, and BMI are derived from the same foot-to-foot BIA signal through different regression equations — not independent measurements.

Not sold in your country

6BLow-Cost Bluetooth PickRENPHO Elis 1 Smart Body Fat Scale

A budget Bluetooth scale sold directly by Amazon.com: 13 metrics in the RENPHO Health app, sync to Apple Health, Samsung Health and Fitbit, 0.05 kg steps and a 180 kg limit. Weakness: no Wi-Fi, and its body fat figure is an estimate like the others.

The RENPHO Elis 1 is the low-cost scale that Amazon.com sells directly in the US. It uses the same foot-to-foot four-electrode BIA as the Xiaomi, sends 13 metrics over Bluetooth to the RENPHO Health app, and passes them on to Apple Health, Samsung Health and Fitbit. There is no Wi-Fi, so your phone has to be nearby when you weigh in. As with every scale here, read the body fat figure as a trend, not an absolute value.

RENPHO Elis 1 Smart Body Fat Scale

$24.99Price as of 2026-11-10

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Specifications▼

Price

Budget

BIA type

Foot-to-foot 4-electrode

Users

Unlimited

Connectivity

Bluetooth

App

RENPHO Health

Weight resolution

0.05kg

Price

Budget

BIA type

Foot-to-foot 4-electrode

Users

Unlimited

Connectivity

Bluetooth

App

RENPHO Health

Weight resolution

0.05kg

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How we compared

We did not run DXA cross-validation. Meaningful body composition accuracy comparison requires recruiting participants across a range of body types, ages, and hydration states; measuring each participant with a clinical DXA scanner (the reference) and each scale on the same day under identical pre-measurement conditions (fasted, morning, voided bladder, no exercise in the prior 12 hours); and comparing the results statistically to calculate mean absolute error and bias for each device. That protocol requires medical facility access, IRB approval, and 80–100 participants to produce meaningful data. We did not run it.

What this comparison is based on: the published electrode specifications and measurement frequency for each scale; the manufacturers' manuals and support pages; general published research on the accuracy of consumer foot-to-foot BIA; and the kinds of problems owners commonly report — readings that change implausibly between measurements, app connectivity failures after software updates, and cases where the same person measures twice in five minutes and sees different body fat percentages. It is a desk comparison; none of the scales was tested hands-on.

The five comparison axes we used: (1) BIA electrode configuration and measurement current — how many electrodes, at what frequency, and what body segments are actually measured vs estimated. (2) Body fat percentage accuracy envelope — what the published validation literature says about consumer BIA error margins, and how to use the numbers intelligently. (3) Ecosystem integration — where the data goes after you step off the scale, and whether you can export it if you change platforms. (4) Segmental body composition — whether any of these scales actually measures arms, legs, and trunk separately (none of the six does) and what that means in practice. (5) Long-term data utility — app stability, data export options, and what happens to your historical records if the company stops supporting the product.

BIA technology — what smart scales actually measure

All six scales use bioelectrical impedance analysis (BIA): they pass a small alternating electrical current through the body and measure the opposition (impedance) to that current. Body fat has higher impedance than lean tissue (muscle, bone, water), so the scale can estimate the ratio of fat to lean mass from the impedance reading combined with your height, weight, age, and sex. This is the fundamental principle. What differs between scales is how many electrodes they use, where those electrodes are placed, and what body segments actually see the current.

Foot-to-foot BIA (both feet on four pad electrodes, two under each foot; current travels foot-to-foot through the lower body): this is the configuration used by all six scales in this comparison. The current path from one foot to the other passes primarily through the lower body — legs, pelvis, and lower abdomen. The upper body impedance is not directly measured; instead, the device estimates total body composition using population-based regression equations. This estimation works reasonably well for people with typical body proportions, but it introduces meaningful error for people with unusual fat distribution patterns (high upper-body fat with lean legs, or heavily muscled legs with typical torso composition).

Hand-and-foot BIA (typically eight electrodes; the current path runs from the hands through the arms and trunk to the feet): none of the six scales in this comparison uses this configuration. The Tanita RD-906 is a step-on, foot-only model; in Tanita's own catalogue the model with hand grips and segmental readings is the RD-800, which is not covered here. What the RD-906 adds over a basic scale is dual-frequency measurement (two frequencies) and a whole-body muscle quality score — it does not output separate readings for the arms, legs, and trunk.

Withings Body Comp uses a foot-to-foot electrode configuration for weight and the standard body composition metrics, but adds a separate measurement for vascular age (pulse wave velocity) via additional sensors that measure the speed at which the pulse travels through the arterial system — a cardiovascular health indicator that BIA alone does not measure. This is a meaningfully different metric from body fat and one that no other scale in this comparison offers.

Single-frequency vs multi-frequency BIA: many consumer scales use a single current frequency (typically 50 kHz). Clinical BIA devices use multiple frequencies because different frequencies penetrate cell membranes differently, allowing separate estimation of intracellular and extracellular water. In this comparison, Tanita describes the RD-906 as dual-frequency (two frequencies) and Withings describes the Body Comp as multi-frequency BIA. Whether this specification difference translates to meaningfully more accurate output in practice depends on the individual user and their measurement conditions.

Body fat percentage accuracy — which numbers to trust

Consumer BIA scales can differ from DXA by several percentage points of body fat, and for some individuals by considerably more, depending on hydration status, time of day, recent exercise, and individual body geometry. The gap tends to be smallest for well-hydrated, same-time-of-day, fasted measurements, and widest for measurements taken after exercise, after a large meal, or in a different hydration state.

The error margin is why treating any single body fat reading as a clinical fact is the wrong approach. The correct interpretation of consumer BIA data: use the trend, not the absolute number. If your body fat percentage on this scale reads 24.0% today and 22.3% in three months, you have likely lost body fat — the direction is reliable even when the absolute number is not. The magnitude of change is less reliable: a 1.7 percentage point drop might be real or might be within the noise of hydration variation. A 4–5 percentage point change sustained over multiple measurements in the same conditions is more meaningful.

Daily hydration variation is the dominant noise source for all BIA scales. Body water affects impedance directly and significantly. Measuring right after intense exercise can shift the body fat reading in either direction compared with the same person measured the next morning. This is not a scale defect — it is physics. The practical protocol that reduces hydration noise: measure at the same time every day (morning, after using the bathroom, before eating or drinking), in the same state (no recent exercise), and use weekly averages rather than daily readings as your tracking unit.

Menstrual cycle phase can affect readings. Body weight tends to be higher in the luteal phase, but several studies have found that average BIA body fat percentage barely changes across the cycle; individual variation is large. Users who menstruate may find that comparing month to month at the same cycle phase is more meaningful than week-to-week variation.

Ecosystem integration — Garmin vs Apple Health vs Health Connect

Where your body composition data lives after you step off the scale determines whether it remains useful over a multi-year period. The six scales in this comparison each route data to a different primary app: Withings Body Comp routes to the Withings app (formerly Health Mate), which syncs with Apple Health and, on Android, with Health Connect — its Google Fit link ended on 6 May 2024; Garmin Index S2 routes to Garmin Connect; Tanita RD-906 routes to the Health Planet app (Tanita's own platform); Xiaomi Mi Body Composition Scale 2 routes to Xiaomi's app (Zepp Life, formerly Mi Fit); and Anker Eufy P2 Pro routes to the Eufy Life app, with Apple Health sync. For the Garmin, Tanita and Xiaomi scales, check each app's current Apple Health and Health Connect support before buying. The RENPHO Elis 1 sends its data to the RENPHO Health app, which syncs with Apple Health, Samsung Health and Fitbit.

The most important ecosystem question for long-term data is not which app looks best today, but what happens if you change your phone platform, the company discontinues the app, or you want to move your historical data. The Withings app offers CSV export of historical measurements and documented API access for developers. Garmin Connect also supports data export. Tanita Health Planet is built for the Japanese market, and we could not confirm its export options or English-language support. Xiaomi's Mi Fit app was renamed Zepp Life — a reminder that apps and their names change over a multi-year tracking period.

Garmin Index S2 has a specific advantage for people who already use Garmin devices (watches, cycling computers, GPS units): body composition data from the Index S2 appears in the same Garmin Connect dashboard as your activities, sleep, and HRV data, creating a single platform view of overall health trends. If you use a Garmin watch and want to see how body composition correlates with training load and recovery over time, the Index S2's tight Garmin Connect integration is genuinely distinctive. Non-Garmin users do not get this benefit.

Apple Health as a central health data repository: both Withings Body Comp and Anker Eufy P2 Pro sync to Apple Health; for the Garmin, Tanita and Xiaomi scales, check the current support in each maker's app. Apple Health provides a reasonable archival format for iPhone users — data stored in Apple Health is not deleted when you change apps or scales. If you use an iPhone and plan to track body composition long-term across potentially different scale brands, treating Apple Health as the canonical data store (and backing it up via iCloud) is a practical data preservation strategy. This option is not available for Android users, for whom Health Connect now plays a similar role — Withings moved its Android sync there after its Google Fit link ended in May 2024.

Where each fits

Withings Body Comp is the pick for users who want the broadest health picture from a single device. No other scale in this comparison measures vascular age (pulse wave velocity), and the Withings app (formerly Health Mate) offers CSV export, API access, and sync with Apple Health and, on Android, Health Connect. The weaknesses are real: foot-to-foot BIA with the same accuracy limitations as the other scales here; it is expensive for a scale; and Withings as a company was bought by Nokia in 2016 and bought back by its founder in 2018 — an ownership round trip worth knowing about when you are counting on long-term software support.

Garmin Index S2 is the right pick if you already use a Garmin device and want body composition data in Garmin Connect alongside your activity and recovery data. The 16-user support is a genuine differentiator for households with multiple Garmin users. The honest weakness: if you do not use a Garmin watch, the Index S2's ecosystem advantage disappears and it becomes a foot-to-foot BIA scale with the same accuracy class as the cheaper Anker Eufy — the premium is justified only by the Garmin Connect integration.

Tanita RD-906 is the pick for users in Japan who want a step-on scale with dual-frequency measurement from a long-established body composition brand. Tanita describes the RD-906 as measuring at two frequencies, and it adds a whole-body muscle quality score. The weaknesses: it does not measure arms, legs, and trunk separately (in Tanita's catalogue that is the hand-grip RD-800); it is a Japan-only model — Tanita states it is for use in Japan because of radio regulations; it is a 2016 model and some retailers now list its successor, the RD-912, so check which model and price you are actually being offered; and the Health Planet app is built for the Japanese market.

Xiaomi Mi Body Composition Scale 2 is the pick when the primary requirement is body fat trend tracking at minimal cost. At its low price, it delivers body fat percentage, BMI, muscle mass, bone mass, and metabolic rate estimates via a Bluetooth connection to Xiaomi's app (Zepp Life, formerly Mi Fit). The honest weaknesses: Bluetooth-only (no Wi-Fi) means you must have your phone nearby when you weigh; it is foot-to-foot BIA, so the absolute body fat number is a rough estimate, as with the other scales here; and Xiaomi's Mi Fit app was renamed Zepp Life, a reminder that apps change if you plan to track data over multiple years.

Anker Eufy Smart Scale P2 Pro offers Wi-Fi sync (no phone-nearby requirement once it has been set up over Bluetooth), Apple Health integration, and 16 body metrics at a mid-range price. For users who want more than a basic Bluetooth scale but cannot justify the premium tier, the P2 Pro is the pragmatic middle option. The weaknesses: 16 metrics sounds comprehensive but most of the additional metrics beyond body fat, weight, and BMI are derived from the same foot-to-foot BIA signal through different regression equations — they are not independent measurements; the Eufy Life app ecosystem is less mature than the Withings app or Garmin Connect; and on Android, check the app's current Health Connect support, since Google Fit is being wound down.

The clinical credibility context

Tanita's position in professional settings is different from its position as a consumer brand. Tanita has been a major body composition scale brand for over 30 years, and its professional equipment is used in hospitals, sports medicine clinics, corporate health management programs, and school physical examinations. When a personal trainer recommends a body composition scale, they often recommend Tanita. This institutional presence is the result of decades of professional products in those settings. Those professional models are different machines from home scales such as the RD-906, and a home body composition scale is not a medical device.

The practical implication: that background does not mean an RD-906 reading will match what a clinic measures — the home and professional models are different machines, and the accuracy envelope of consumer BIA is wide enough that consistent measurement conditions matter more than the brand. Anyone under medical monitoring should rely on the measurements their clinician takes, not on a home scale.

Import warranty and after-sales service: Withings Body Comp and Garmin Index S2 are sold through major online retailers and typically have local warranty coverage, but their dedicated service networks are smaller than Tanita's. Xiaomi Mi Body Composition Scale 2 is widely available at budget prices, but warranty and after-sales support for Xiaomi products typically flows through online marketplace sellers rather than a branded service centre — standard for budget import electronics, but worth knowing. Anker has a strong retail and customer service presence (physical retail stores and a direct customer service line), which is meaningfully better after-sales infrastructure than Xiaomi's.

Our pick and honest caveats

For most users who want a capable smart scale and do not have a specific Garmin requirement, Anker Eufy Smart Scale P2 Pro delivers a good balance of features, Apple Health sync, and price. Wi-Fi sync removes the phone-proximity requirement once the scale has been set up over Bluetooth. The accuracy envelope is the same foot-to-foot BIA class as the other scales in this comparison, which means the absolute body fat number is a rough estimate — but at its price, the cost of that limitation is proportionate.

If you use a Garmin watch and track fitness data in Garmin Connect, Garmin Index S2 is the coherent pick. The premium over the Eufy is justified solely by ecosystem integration — if you do not already use Garmin, there is no reason to pay the premium.

If you are in Japan and want a step-on Tanita scale with dual-frequency measurement and a muscle quality score, Tanita RD-906 is a reasonable choice. It does not measure body segments separately, it is a Japan-only model, and its successor, the RD-912, is now on sale — check which model and price a retailer is actually offering. The Health Planet app is built for the Japanese market.

Withings Body Comp is the pick if vascular age monitoring matters to you alongside body composition — it is the only scale in this comparison that measures pulse wave velocity. Its body composition measurement is foot-to-foot BIA like the others, so the higher price buys the cardiovascular metric and the app, not a more accurate body fat number.

Xiaomi Mi Body Composition Scale 2 needs no justification when budget is the constraint. The body fat trend data it produces is useful. Treat the absolute numbers as rough estimates, as with every scale in this comparison.

Using trend data correctly — why daily fluctuation is noise

The single most common mistake with smart scale data is treating daily body fat readings as meaningful signal. A 24.0% reading Monday morning, a 25.8% reading Tuesday morning, and a 23.1% reading Wednesday morning does not mean you gained and then lost body fat — it means your hydration status, meal timing, and bathroom schedule differed slightly across those three mornings. Body fat percentage from BIA scales does not move 1–2 percentage points in 24 hours from actual fat mass change; those swings are measurement noise from hydration variation.

The correct framework: record your weight and body fat reading every morning under identical conditions (same time, same pre-measurement state: after waking, after using the bathroom, before eating or drinking, barefoot and without heavy clothing). Do not track day-to-day. Track 7-day rolling averages or monthly averages. A 1 percentage point change in your monthly average body fat is a meaningful signal. A 2 percentage point swing between Tuesday and Wednesday is noise.

Weight and body fat can move in opposite directions due to muscle gain. If you are starting a strength training program and eating at or near maintenance calories, it is common to see scale weight hold steady or increase slightly while body fat percentage trends downward. This is the expected pattern for body recomposition — gaining lean mass while losing fat mass. BIA scales are sensitive enough to detect this trend over a 6–8 week period, but only if you are tracking weekly averages rather than reacting to individual daily readings.

For users tracking body composition in conjunction with a caloric deficit (intentional fat loss), the expected rate of measurable BIA change is roughly 0.5–1.0 percentage points of body fat per month under a moderate caloric deficit (300–500 kcal/day). Faster apparent changes are likely noise; slower apparent changes over multiple months are likely genuine but within the scale's error envelope. The practical takeaway: a 3-month trend showing a consistent downward direction in body fat percentage is more valuable information than any single reading, regardless of which scale you use.