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Smart scale

Renpho Elis 1 Smart Body Scale

Elis 1 (ES-CS20M by Renpho's part number), three AAA batteries included

$24.99US price, checked Oct 23, 2026

Basic Bluetooth smart scale with 13 body metrics in a free app, $24.99

Check price at Renpho Full review →

Smart scale

Withings Body Smart

Body Smart, black (also sold in white), Wi-Fi and Bluetooth, four AAA batteries included

$129.95US price, checked Oct 23, 2026

Withings smart scale that reads body composition through the feet, $129.95

Check price at Withings Full review →

Criterion	Renpho Elis 1 Smart Body Scale	Withings Body Smart
US price	$24.99Checked Oct 23, 2026 · Price details in the review	$129.95Checked Oct 23, 2026 · Price details in the review
Three-year ownership estimate	$24.99 Incomplete known subtotal. Not included: annual consumables, energy use.	$129.95 Incomplete known subtotal. Not included: annual consumables, energy use.
Choose if	You want a low-cost scale that records weight trends and sends body readings to a free app.	You want Withings' app, Wi-Fi sync and body composition readings from a scale without a handle or ECG.
Main trade-off	It reads through the feet only, Renpho gives no body-fat accuracy figure, and only weight shows on the scale.	It reads through the feet only, Withings publishes no accuracy figure for it, and some people must switch off its body-fat readings.
Key specifications	Body composition method: Bioelectrical impedance through 4 electrodes in the platform. Renpho says current runs up through one foot, into the lower body and down the other foot, and the upper body is estimated with algorithms. The app shows 13 metrics: weight, BMI, body fat %, body water %, skeletal muscle, fat-free body weight, muscle mass, bone mass, protein, basal metabolic rate, subcutaneous fat, visceral fat and metabolic age. Renpho doesn't state the frequency Weighing: 6.6 to 400 lb (3 to 180 kg) in 0.1 lb (0.05 kg) steps. Units: lb and kg. Renpho's manual page lists the ES-CS20M among its models. It gives weight accuracy of ±0.3 kg at 50 kg, ±0.4 kg at 100 kg and ±0.5 kg at 150 kg Display: LED display. Renpho lists weight as the one body metric shown on the scale; the other 12 are in the app Users and ages: Unlimited profiles in the app, with automatic user recognition. The manual page says children under 10 and adults over 70 get weighing only, while Renpho's collection FAQ says children under 8 Connectivity and app: Bluetooth, version 5 per the manual page. Works only with the Renpho Health app, which the App Store lists as requiring iOS 15.1 or later. The App Store also lists Apple Watch. Syncs with Apple Health, Fitbit, Samsung Health and MyFitnessPal Battery: Three AAA batteries, included. Renpho gives a battery life of up to 4.5 months Use guidance: Bare feet on the electrodes, a hard flat surface, and weighing at the same time each day. The scale switches off after 10 seconds. Renpho says to recalibrate it if it has been moved or turned upside down In the box: Elis 1 Smart Body Scale, three AAA batteries and a manual	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)
Exact variant	Elis 1 (ES-CS20M by Renpho's part number), three AAA batteries included	Body Smart, black (also sold in white), Wi-Fi and Bluetooth, four AAA batteries included
Dimensions	The scale's size and weight are unknown. Renpho's product page lists only a 400 lb capacity.	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.
Installation	No installation. The three AAA batteries are included. Put the scale on a hard, flat floor, since Renpho says carpet causes inaccurate readings. Download the free Renpho Health app, create an account or use guest mode, and pair the scale over Bluetooth while standing on it with bare feet.	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.
Materials	Glass, per Renpho's product page. Renpho's manual page, which covers several scale models, lists tempered glass with HIPS plastic.	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.
Warranty	18 months from the original retail purchase for buyers in the US and Canada, per Renpho's warranty terms. They apply to scales bought on Renpho's own site, and other sales channels may differ. The product page also says 18 months, but Renpho's manual page still says one year. Renpho repairs, replaces or refunds at its choice. Batteries made to diminish over time, cosmetic damage, accidents, liquid contact and unauthorized service aren't covered.	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.
Returns	30 days from delivery, per Renpho's shipping and returns page. If you return the scale for a personal reason, it must be unused and in its original packaging. You pay return shipping, and Renpho charges no restocking fee. If it arrives damaged or defective within 30 days, Renpho pays return shipping and gives a full refund or a free replacement. Contact support first, and Renpho then sends a prepaid label.	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.
Unresolved questions	Accuracy of the scale's body composition readings: Renpho gives no figure, and no study naming the Elis 1 was found Which RENPHO scale the 2023 study tested The impedance frequency Which age limit applies to body readings: the manual page says under 10 and over 70 get weighing only, and the collection FAQ says under 8 Whether the warranty is 18 months, as the warranty terms and product page say, or the one year in the manual page Shipping cost for a single scale, and how return shipping is charged for a personal-reason return What replacement AAA batteries cost, since Renpho doesn't price them Whether the app has any optional paid feature, since Renpho calls it completely free The scale's size and weight	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

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.