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A stack of bathroom scales resting on a tile floor next to a tub in the bathroom Credit: Reviewed / Betsey Goldwasser

The Best Smart Scales of 2023

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A stack of bathroom scales resting on a tile floor next to a tub in the bathroom Credit: Reviewed / Betsey Goldwasser

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Editor's Choice Product image of Renpho ES-CS20M Smart Bluetooth Body Fat Scale
Best Overall

Renpho ES-CS20M Smart Bluetooth Body Fat Scale

Renpho’s smart scale delivers quick, accurate measurements with handy app integration via Bluetooth. It has an upper limit of 396 pounds. Read More

Pros

  • Shows measurements quickly and accurately
  • Delivers data to Bluetooth app quickly

Cons

  • Small platform can feel awkward beneath the feet
  • Maxes out at 396 pounds
Product image of Wyze Smart Scale

Wyze Smart Scale

This Wyze scale measures muscle mass, weight, heart rate, body fat percentage, and body mass index for an accurate assessment of your progress. Read More

Pros

  • Accurate weight measurements
  • Affordable

Cons

  • Some issues with the app
Product image of Garmin Index S2

Garmin Index S2

The Garmin Index S2 could be a useful tool if you're already a Garmin watch user, but ultimately is not worth the price. Read More

Pros

  • Large, easy-to-read display
  • Roomy platform

Cons

  • Small inconsistencies in measurements affect tracking log
Product image of Weight Watchers by Conair WW910 Body Analysis Bluetooth Scale

Weight Watchers by Conair WW910 Body Analysis Bluetooth Scale

We weren't impressed by this scale because it gave us inconsistent readings during testing. Read More

Pros

  • Up to 4 people that can keep track of their weight and BMI
  • Easy to set up

Cons

  • Inconsistent readings
  • Sounds like it's going to break when stepped on
Product image of Withings Body+

Withings Body+

The Withings scale looks nice but isn't intuitive to use. Read More

Pros

  • Sleek, attractive aesthetic

Cons

  • Feet can slide on smooth surfaces
  • Partner app is difficult to use

For any number of reasons, you may benefit from having a scale in your bathroom. Studies show that folks who track their weight regularly are more likely to maintain a healthy body size, ostensibly because they’re quicker to notice undesired weight changes and nip them in the bud. A smart scale can be an even more valuable tool as it records both your weight as well as measures—or at least approximates—your body composition, or the percentages of fat versus lean body mass. By tracking all of these values over time, you can see if your efforts to eat better and exercise more are paying off, in terms of shedding unwanted fat while building desired muscle.

The Renpho Bluetooth Body Fat Scale (available at Amazon) is an excellent smart scale as well as an everyday basic bathroom scale in one that will satisfy anyone’s weighing-in and body-composition-taking needs—for a fraction of the price of others.

Editor's Note:
The recommendations in this guide are based on thorough product and market research by our team of expert product reviewers. The picks are based on examining user reviews, product specifications, and, in some cases, our experience with the specific products named.
A woman standing on the Renpho smart scale
Credit: Reviewed / Betsey Goldwasser

The Renpho smart scale packs all the features you'd want into a bathroom scale for an affordable price.

Best Overall
Renpho ES-CS20M Smart Bluetooth Body Fat Scale

Renpho scales deliver consistent weight and body composition measurements throughout weigh-ins, is a cinch to use, and rings in at the same price of many basic weight-only scales, all of which make it our hands-down recommendation for best smart scale.

This scale works quickly—all other smart scales require more idle standing to register their body composition numbers than Renpho. This is because Renpho displays just your weight on its easy-to-read screen—it doesn’t scroll through the “smart” readings like others do. Instead, you must open the app to view those numbers—which we think is more user-friendly. It means the Renpho smart scale can be used as a basic scale for daily use with ease, while providing that next-level data if and when it’s desired (see “What You Should Know About Using a Bathroom Scale,” below).

What’s more, this was one of the only scales that didn’t give us a funky first weight reading—a common-but-fixable calibration problem that can cast doubts on a scale’s accuracy. (The fix: Tap the scale to zero it out before stepping on, even if the instructions say you don’t have to.)

When you open the app, the Renpho connects to your phone via Bluetooth to upload its stored data—at least a few days’ worth are saved in scale’s memory. It can even differentiate users in the app based on the readings it collects and asks you to confirm which user you are. Renpho is also compatible with Apple Health, MyFitnessPal, Samsung Health, and Google Fit, so you can keep all your health info in one place.

The smart scale measures the usual body fat percentage versus muscle mass, as well as the percentages of subcutaneous fat (beneath skin) and visceral fat (around the organs). It also estimates your basal metabolic rate (i.e., the minimum calories your body needs to function at rest). There’s no way of knowing if those metrics are accurate readings—and most likely they aren’t. Still, we found the body fat readings consistent from day to day, meaning you can rely on Renpho for tracking how your body changes over time.

It should be noted that the platform is the smallest of the scales we found, though not worrisomely so. The Renpho also maxes out at 396 pounds, on the lower side of the spectrum, which goes up to 440 for some scales.

All told, if you want a smart scale, the Renpho does it all and quite well—and is an exceptional value for its price.

Pros

  • Shows measurements quickly and accurately

  • Delivers data to Bluetooth app quickly

Cons

  • Small platform can feel awkward beneath the feet

  • Maxes out at 396 pounds

Product image of Wyze Smart Scale
Wyze Smart Scale

With over 24,000 reviews and 4.6 stars, this popular Wyze scale measures muscle mass, weight, heart rate, body fat percentage, and body mass index (bmi) for an accurate assessment of your progress. It’ll send your stats to the Wyze App for free, although some reviewers had issues with the app always cooperating. It also syncs to other popular apps, such as Fitbit, Apple Health, and Google Fit. What’s more with this smart scale: you can easily view your weight and body fat measurement on the digital LED screen.

Pros

  • Accurate weight measurements

  • Affordable

Cons

  • Some issues with the app

Product image of Garmin Index S2
Garmin Index S2

If you already own a Garmin running watch, we can see why you might consider company’s Index 2 Smart Scale, which beams weight and body composition data to the same app for an even more holistic picture of your fitness.

Numbers-wise, the scale works fine—in testing, it recorded readings that varied by no more than 1%. However, if you move it (say from storage under a vanity), you’ll want to calibrate it with a tap to zero it out first—otherwise, you may get erroneously high readings that affect the line chart displayed on the screen and in the app to indicate weight changes. It also takes longer than most to scroll through the data and upload it over Wi-Fi, so if you’re dubious about a first weigh-in and want a do-over, you’ll be standing idly by.

Given the slight reliability issues, we can’t justify recommending you spend this much cash—approximately five times more than our top pick—unless you’re deeply Team Garmin.

Pros

  • Large, easy-to-read display

  • Roomy platform

Cons

  • Small inconsistencies in measurements affect tracking log

Product image of Weight Watchers by Conair WW910 Body Analysis Bluetooth Scale
Weight Watchers by Conair WW910 Body Analysis Bluetooth Scale

We weren’t huge fans of the “smart” Weight Watchers by Conair Body Analysis Bluetooth Digital Bathroom Scale. For starters, it makes an unsettling creaking noise when stepping onto it, which made us question its build.

And we weren’t impressed with its performance, either. Despite being the only smart scale that requires the user to tap the surface first to calibrate to zero before stepping on, we still got inaccurate readings.

Pros

  • Up to 4 people that can keep track of their weight and BMI

  • Easy to set up

Cons

  • Inconsistent readings

  • Sounds like it's going to break when stepped on

Product image of Withings Body+
Withings Body+

The “smart” Withings Body+ looks sleek, but it fails to wow us with either its usability or its reliability.

We found the scale’s feet slide around easily on bathroom tile, requiring extra care when stepping up. The display is crowded and it only scrolls the data once, and too quickly. You can take your time looking it over on the app—which, by the way, isn’t called “Withings,” which makes it hard to find in the app store (it’s called HealthMate, FYI).

The most disconcerting issue is that poor readings aren't uncommon, which means you’ll probably need to take a best-of-three approach every time you go to weigh yourself. Like Garmin, the HealthMate app creates a line chart to show your weight trend, so if you do the many-readings route, yours will be all over the place. You can delete any erroneous weights manually—if you’re confident they’re actually wrong—but it would be better if they just didn’t happen in the first place.

Pros

  • Sleek, attractive aesthetic

Cons

  • Feet can slide on smooth surfaces

  • Partner app is difficult to use

Product image of Greater Goods Designer Bluetooth + BC Smart Scale
Greater Goods Designer Bluetooth + BC Smart Scale

On the plus side for this Greater Goods scale, the app setup is a friendly experience. On the minus side: It took inaccurate and wildly unreliable weight recordings. Without tapping the surface first to calibrate to zero, our tester weighed in 23 pounds too light on multiple occasions.

Pros

  • Easy app setup

Cons

  • Often gave inaccurate and wildly unreliable weight recordings

Product image of Fitbit Aria Air
Fitbit Aria Air

The Fitbit Aria Air is a digital body weight and bmi smart scale that syncs and displays your stats on the dashboard using bluetooth. With the Fitbit App, you can easily read and monitor the progress on your health journey. Reviewers say it’s a good scale, it just may be a bit confusing to set up.

Pros

  • Good for the price

  • Easy-to-read dashboard

Cons

  • Difficult to set up

What You Should Know About Using a Smart Scale

Weight on its own isn’t the most useful measure of your body size, as it only tells part of the story. While it provides a summary number that you can compare week to week or month to month, it doesn’t differentiate how much of your body is fat, muscle, or other mass—bone, skin, organs, even the water in your cells. That’s where a “smart” scale can be useful. These use bioelectrical impedance analysis (BIA), which passes a low-level charge of electricity through your tissues, using the speed at which the pulses return to the device to determine how much of each type of tissue (based on relative bone density) that it passed through.

Some smart scales claim to differentiate body composition into percentages of fat, bone mass, muscle mass, and body water content, while some only give “fat” mass and "lean" mass, which encompasses the other three. But this, too, is rife with its own accuracy and validity problems. With a typical bathroom scale that you stand on, the charge only passes through the lower body, so if you carry more fat mass below the waist, the scale will produce a higher body-fat percentage reading than is likely true. Secondly, your hydration level can alter the results, which is why taking readings at the same time every day is important.

All of that said, there’s value in keeping a log of both weight and body composition as a way to track progress while following an exercise-and-nutrition plan. Smart scales all have companion apps and beam data via Bluetooth or Wi-Fi to your phone to save your numbers electronically, so you don’t need to keep a pen and pad handy. Some also integrate with health and fitness apps like Apple Health and Google Fit, to allow you to store and analyze your overall health data all together.

For those with a weight gain or weight loss fitness goal, taking weight measurements on a daily-to-weekly basis can show the progress made, and at what rate. By recording weekly or monthly body composition percentages, you may see a shift in the percent of muscle versus fat—especially helpful for those following a strength- or muscle-building plan or to explain temporary weight plateaus. When someone’s aim is to “tone up,” they may not see a dramatic change in their total weight yet still be building muscle while losing weight and body fat. A log of readings from a bioelectrical impedance device could capture that trend.

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The Reviewed staff is based in the heart of Cambridge, MA. Backed by our knowledgeable writers and rigorous test labs, we're working hard to make sure you can make the right decisions about what to buy.

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Lily Hartman

Lily Hartman

Staff Writer, Search

Lily Hartman is a staff writer who also enjoys writing magazine articles about health and outdoor recreation. In her free time, she likes to hike, camp, run, and lift weights.

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