Best budget smart scale
Wyze Scale X
Low-cost Bluetooth smart scale with 13 body metrics and a weight-only mode, $38.98
$38.98
US price, checked
Best smart scale
Withings Body Smart
Withings smart scale that reads body composition through the feet, $129.95
Our founder, Porsche Ma, has used this one. Like every review here, it rests on published sources, not hands-on testing. Our method
Porsche also cofounded Superhuman Chambers, which sells hyperbaric chambers · About the author. This is general information, not medical advice, and no clinician has reviewed it.
The verdict
Body Smart reads body composition and standing heart rate through the foot platform and syncs over Wi-Fi to the Withings app. It suits you if you want Withings' app and sync without the Body Scan's handle and ECG. The catch: Withings gives no accuracy figure for it, and new accounts need Withings+ to sync to Apple Health. If you want the handle, five-zone readings and an ECG, look at the Withings Body Scan.
The trade-off
It reads through the feet only, Withings publishes no accuracy figure for it, and some people must switch off its body-fat readings.
At a glanceSmart scale
- Body composition method
- Multi-frequency bioelectrical impedance through electrodes in the foot platform
- Weighing
- Four weight sensors
- Heart rate
- Standing heart rate on the scale
- Users and modes
- Recognizes up to 8 users
Model reviewed: Body Smart, black (also sold in white), Wi-Fi and Bluetooth, four AAA batteries included
No affiliate commission on this link. Check the exact variant before buying.
- Returns 30 days from receipt. See conditions
- Warranty 2-year quality guarantee.
About this price
List price for the black Body Smart on Withings' US store, in US dollars on Oct 20, 2026, with no sale price. Withings+ appears as a separate optional line at $99.50 a year and isn't included. The page says free shipping and returns. Tax is extra.
$50$100$200$500
A GOOD FIT FOR
You want Withings' app, Wi-Fi sync and body composition readings from a scale without a handle or ECG.
- You want Withings' app and Wi-Fi sync with fat, muscle and water readings from a scale without a handle
- You want standing heart rate on the scale as well as weight
- You want a scale for up to 8 people that runs on batteries, with no charging cable
THINK TWICE IF
- You wear a pacemaker or another internal medical device: Withings says not to use the scale unless the body-fat and heart-rate readings are turned off
- You're pregnant and want body-fat readings: Withings says the scale hasn't been tested or validated in pregnancy and recommends turning impedance off
- You want fat and muscle readings for each arm and leg, or an ECG, which need the Body Scan's handle
- You need body-fat accuracy that an independent study has confirmed, since Withings gives no figure for this scale
What still needs checking
- Any accuracy figure or DEXA comparison for the Body Smart, since Withings gives none and no independent study was found
- The terms of Withings' 2-year quality guarantee in the US
- Whether returns are free, and whether the 30 days count from receipt, purchase or order, since Withings' pages disagree
- The scale's weight, which the product page doesn't give
- What replacement AAA batteries cost, since Withings doesn't price them
- Which modes it has now: the product page lists Athlete, Pregnancy, Baby and Eyes Closed, while the Body Smart FAQ says pregnancy mode is still to come
Is the Withings Body Smart accurate?
Withings gives no accuracy figure or DEXA study for the Body Smart14.
Weight is the easier part: the scale reads in 0.1 lb steps1. For body fat, an independent test of an earlier Withings scale, the Body Cardio, found fat-mass readings a median of 3.7 kg low against DEXA in hospital patients12. In 73 healthy adults, the same model read 0.4 points low on average, with a wide spread between individuals13.
Does the Withings Body Smart need a subscription?
No. Withings says baseline metrics and trends stay free in its app, and Withings+ is optional17.
Withings+ costs $9.95 a month or $99.50 a year6.
One catch for new buyers is data export. Withings says accounts created on or after Oct 13, 2026 need an active Withings+ subscription to send data to Apple Health, Health Connect and other apps7.
Can you use the Withings Body Smart with a pacemaker?
Withings says no: you should not use the Body Smart if you wear a pacemaker or other internal medical device3. Its small electrical signal, used for fat mass, may interfere with the device3.
Owners who want to keep the scale can use it with the fat mass and heart rate measurements turned off in the Withings app3. Withings also recommends turning impedance off in pregnancy, and says a stent doesn’t affect the measurement3.
The practical details.
| Exact variant | Body Smart, black (also sold in white), Wi-Fi and Bluetooth, four AAA batteries included |
|---|---|
| Body composition method | Multi-frequency bioelectrical impedance through electrodes in the foot platform. Withings says the current runs through the lower half of the body. It reports body fat %, body water %, muscle mass, bone mass, visceral fat index and basal metabolic rate. The product page lists 250 kHz frequencies, while Withings' support FAQ says two frequencies between 5 and 800 kHz and a current under 1,280 microamps RMS |
| Weighing | Four weight sensors. Range 9 to 440 lb (5 to 200 kg) in 0.1 lb (50 g) steps. Units: kg, lb and st lb |
| Heart rate | Standing heart rate on the scale. No ECG, which needs the Body Scan's handle |
| Users and modes | Recognizes up to 8 users. Athlete, Pregnancy, Baby and Eyes Closed modes per the product page, though the Body Smart FAQ lists no Pregnancy or Baby mode. No minimum or maximum foot size |
| Connectivity and app | Wi-Fi 802.11 b/g/n and Bluetooth. Wi-Fi syncing means your phone doesn't have to be nearby. Needs the Withings app on iOS 18 or later, or Android 12 or later. Stores up to 16 weigh-ins when it can't sync |
| Battery | Four 1.5 V alkaline AAA cells, included and already installed. Withings gives an average battery life of 15 months |
| Display | 2.8 in color LCD, 320 x 240 pixels |
| In the box | Body Smart, carpet feet, alkaline cells already installed and a quick installation guide (English, French, German, Italian and Spanish) |
| Dimensions | The tempered glass platform measures 12.8 x 12.8 x 1.1 in (325 x 325 x 25.6 mm), per Withings' product page. The page gives no weight. |
| Materials | High-strength tempered glass platform, per Withings' product page, which also lists a paint-free satin white casing and an ultra-slim design. It states no other materials. |
Before you buy
InstallationNo installation
No installation. Four alkaline AAA cells are already installed. You set it up in the Withings app over Wi-Fi or Bluetooth, and it can't be set up from a computer. The box includes carpet feet and a quick installation guide.
Warranty2-year quality guarantee, per Withings' product page
2-year quality guarantee, per Withings' product page. The US store's terms of sale describe legal warranties under French law. They give no US warranty terms.
Returns30 days from receipt, per Withings' refund policy
30 days from receipt, per Withings' refund policy. Withings' Body Smart FAQ counts the 30 days from the order date and says used scales can be returned. You start the return from your Withings account and send everything back with the label. The product page says free shipping and returns, but the policy says you pay return shipping after a withdrawal.
More about this assessment
Body Smart is a Withings scale that reads body composition through electrodes in the foot platform. Withings lists it at $129.95. It reports body fat, water, muscle, bone, visceral fat and basal metabolic rate, plus standing heart rate, and syncs over Wi-Fi or Bluetooth. Withings gives no accuracy figure or DEXA study for it, and none from an independent group was found. It has no handle, and Withings lists no segmental readings or ECG for it. Withings says not to use it with a pacemaker or other internal medical device unless the body-fat and heart-rate readings are turned off. Baseline data is free, but accounts created on or after Oct 13, 2026 need Withings+ to send data to Apple Health.
Strengths on paper
- Wi-Fi sync, so readings reach the app without your phone nearby
- Weighs in 0.1 lb steps
- Batteries included, with an average life of 15 months according to Withings
- Baseline data and trends are free in the Withings app, and Withings+ is optional
- Withings says a stent doesn't affect the measurement
- Withings lists a 2-year quality guarantee and a 30-day return window
Limitations
- Reads through the feet only: Withings says the current runs through the lower half of the body, and it lists no handle, segmental readings or ECG
- Withings gives no accuracy figure or DEXA study for the Body Smart
- No independent validation of the Body Smart's body composition was found
- Withings says accounts created on or after Oct 13, 2026 need Withings+ to export data to Apple Health, Health Connect and other apps
- Not for pacemakers or other internal medical devices unless the body-fat and heart-rate readings are turned off
- Needs iOS 18 or later, or Android 12 or later, and can't be set up from a computer
Running costs.
PLAN YOUR OWNERSHIP COSTS
What will it cost to own?
Change the assumptions to fit your use. Leave an unknown cost blank. Add water, subscriptions, cleaning, shipping and taxes if they apply. Use average operating power, not the maximum rating.
3-year known subtotal
$129.95Incomplete: annual consumables, energy use. This is not the full ownership cost.
Energy component: Unknown
Purchase + installation + years × (annual consumables + annual other) + watts/1000 × hours/day × 365 × years × $/kWh. Annualized allowances, not an exact replacement schedule. Excludes taxes, shipping, finance and resale unless entered.Replacement parts & cost assumptions
Recorded recurring parts and refills:
- AAA alkaline batteries (four): price not stated, every 15 months. Withings includes the first set and gives an average battery life of 15 months. It doesn't price replacements.
- Purchase is the $129.95 list price on Oct 23, 2026, before tax.
- Other annual costs are $0 because Withings says baseline data and trends stay free in its app and Withings+ is optional. Withings+ costs $9.95 a month or $99.50 a year, which would add $298.50 over three years on the annual plan. That isn't counted.
- Withings says accounts created on or after Oct 13, 2026 need an active Withings+ subscription. It is required to send data to Apple Health, Health Connect and other third-party apps. If you need that sync, add the subscription to the cost.
- Annual consumables are unknown. The box has four AAA cells that Withings says last an average of 15 months, but Withings doesn't price replacements. The scale is battery-powered, so energy use isn't counted.
Evidence & sources.
Are smart scales worth it? Our evidence review grades the research as Moderate. That grade is about the claim, not about this product.
- Manufacturer claimPrice, specs, box contents, modes, battery life, connectivity and the 2-year quality guarantee come from Withings' US product page and support pages.15 Manufacturer information, not independent testing. The product page prints the platform size but not the weight, and it gives no accuracy figure.
- Regulator recordWithings' Body Smart page claims no FDA clearance, and FDA's 510(k) data show no clearance that covers the Body Smart.1011 A database search isn't proof that no listing exists. The only Withings-named body composition scale clearance in the database is K121971 from 2012. Its applicant is Zhongshan Transtek Electronics Co., Ltd., and it covers an earlier scale.
- Manufacturer claimWithings says you should not use the Body Smart if you wear a pacemaker or other internal medical device, because its small electrical signal may interfere. Owners who keep the scale can use it with the fat mass and heart rate measurements turned off in the app. It says stents don't affect the measurement or pose a risk. It also says the scale hasn't been tested or validated in pregnancy and recommends turning impedance off.3 This is Withings' own safety guidance, not a clinical finding. Turning off fat mass measurement turns it off for every user and account linked to the scale.
- Published studyA 2021 observational study at a Paris hospital compared three consumer smart scales with DEXA in patients referred for a scan. One was the Withings Body Cardio, an earlier Withings model, used by 48 patients. Its median fat-mass error was 3.7 kg too low.12 The study didn't test the Body Smart, so these figures don't describe it. The authors concluded that smart scales aren't accurate for body composition and shouldn't replace DEXA in patient care.
- Published studyA 2023 laboratory study of 73 healthy adults aged 19 to 50 compared 15 body-fat devices with a four-compartment reference model. The Withings Body Cardio read an average of 0.4 percentage points low (95% CI -1.7 to 1.0). Its total error against the reference model was 5.8 points, and the paper rated its standard error of the estimate "poor".13 The study didn't test the Body Smart. A small average error can hide larger errors for one person, which its 5.8-point total error reflects.
- Manufacturer claimWithings says baseline metrics and trends stay free in its app. Withings+ is optional and costs $9.95 a month or $99.50 a year, with a one-month trial offered at purchase. Accounts created on or after Oct 13, 2026 need an active Withings+ subscription to export data to Apple Health, Health Connect and similar apps. Older accounts are unaffected.167 Withings says you keep direct access to your data whatever your subscription status.
Sources (13)
- Body Smart Black Withings · manufacturer · checked Oct 23, 2026
- Body Smart Black listing on Withings' US store (price and availability) Withings · manufacturer · price read from the store’s product data · checked Oct 20, 2026
- Body Smart - Frequently asked questions about safety Withings Support · manufacturer · checked Oct 21, 2026
- Body Smart - FAQ Withings Support · manufacturer · checked Oct 21, 2026
- Body Smart - Learn more about body composition and bioelectrical impedance analysis (BIA) Withings Support · manufacturer · checked Oct 21, 2026
- Withings+ Withings · manufacturer · checked Oct 21, 2026
- Partner Apps - What is Apple Health? Withings Support · manufacturer · checked Oct 21, 2026
- Return and refund policy Withings · manufacturer · checked Oct 21, 2026
- Terms of sale Withings · manufacturer · checked Oct 21, 2026
- openFDA 510(k) records for applicant Withings U.S. Food and Drug Administration (openFDA) · regulator · data file · checked Oct 20, 2026
- openFDA 510(k) records with Withings in the device name U.S. Food and Drug Administration (openFDA) · regulator · data file · checked Oct 20, 2026
- Accuracy of smart scales on weight and body composition: observational study JMIR mHealth and uHealth (Frija-Masson J et al.) · study · checked Oct 20, 2026
- Assessing the reliability and cross-sectional and longitudinal validity of fifteen bioelectrical impedance analysis devices British Journal of Nutrition (Siedler MR et al.) · study · checked Oct 20, 2026
Garmin
Garmin Index S2
Wi-Fi smart scale for up to 16 people with foot-to-foot body composition, $199.99
$199.99
US price, checked
Renpho
Renpho Elis 1 Smart Body Scale
Basic Bluetooth smart scale with 13 body metrics in a free app, $24.99
$24.99
US price, checked
About this review. The facts on this page come from manufacturer pages, regulator records and published studies, checked between Oct 20 and Oct 23, 2026. The sources are listed above.
Our editorial policy →