The QardioBase is a Wi-Fi connected smart scale created by Qardio, the same company that produces the well-known medical-grade QardioArm blood pressure monitoring accessory. QardioBase, Qardio's second product, was first introduced at CES in January of 2015 and began shipping out to customers in the fall.

Qardio's new scale includes features for measuring weight and analyzing body composition to provide details on a person's overall health. It bundles these health-management features into a friendly package that's meant to provide gentle guidance towards a healthier life. I've been testing the QardioBase for several weeks now, and while I'm a fan of the minimal design and the health features it provides, there are some flaws that will prevent it from appealing to all users.

qardiobasemain

Design

At first glance, the QardioBase is one good looking scale. Circular in shape, it features a plain white glass-covered top that's unmarred by numbers or other adornments. Underneath that glass is an LED screen, which is what displays body weight and other information using green pixels.

The QardioBase looks nice, but in my experience, it has a not-insignificant design flaw. It has a funnel-shaped design where the outer edges of the scale extend further outwards than the base, making it unstable. When I stepped on or off the scale near the edge, it felt like it was going to tip over, taking me along with it. I didn't fall when using it, but I did have a few "Oh my gosh!" moments where I had to grab on to something to steady myself. I'm no designer, but this instability seems like a big oversight.

qardiobasesideview
Measuring in at 12.6 inches across, the QardioBase is similar in size to the average house scale, but its round shape means it doesn't fit as neatly up against a wall or in a corner when not in use.

qardiobaseedge
Underneath, the QardioBase opens up to allow batteries to be inserted. It takes 8 AAA batteries, likely due to the LED display under the glass. That's a lot of batteries to have to keep on hand, and a significant ongoing cost. My existing scale uses half that number of batteries. According to QardioBase, the batteries last a year with regular usage, and I had no issues with battery during the time that I tested the scale.

qardiobaseunderneath
The QardioBase was fairly accurate with my weight, which never fluctuates far from 100lbs, but it did have a tendency to offer up different weight readings through 10 weighings during the same five minute testing period:

102
101.6
102.2
101.6
101.4
102.2
101.1
101.6
101.6
101.4

Actual weight, as measured by my standard scale that did not have the same fluctuations across multiple weighings, was 101.4. It's not a huge difference, but the Qardio was off by almost a pound some of the time and not getting the same weight result twice was odd.

Other Features

Smart visual feedback is one of the best features about the QardioBase. When you step on, it will display a happy face, a sad face, or a neutral face to give immediate feedback on weight loss or weight gain. The face is accompanied by an LED readout of weight, so you don't need to open the app to get a weight measurement. If, for some reason, you hate happy faces, you can set it to only display the weight.

smileyqardio
Along with weight, the QardioBase measures body fat. I can't comment on the accuracy of this feature because during my time testing, I wasn't able to find a way to have my body fat tested professionally. I contacted both my doctor and other doctors in my area, but I couldn't find a reliable medical source to get accurate data.

Scales that measure body fat through bioelectrical impedance probably shouldn't be relied upon as offering accurate data, as there are a lot of variables that can affect results even on a day to day basis, including hydration level, food intake, exercise, and the skin on the foot. According to Consumer Reports, these scales are inaccurate enough that it won't include body fat capabilities as a metric when testing scales, and a 2008 study of similar devices [PDF] found them useful only as a means to motivate subjects to lose weight due to limited accuracy.

qardiobaseextra
To take a body fat measurement, the scale needs skin contact. That means socks need to be removed. While the weight measurements captured with the scale were always close to my actual weight, I saw a lot more variation with the body fat measurement. I had readings that were as low as 27 percent and as high as 35 percent over the course of several weeks.

Based on weight, the QardioBase will also include body mass index calculations to let users know where they fall on that scale. It has details on muscle, water, and bone composition too, taken from the body fat measurement, but again, those are of questionable accuracy being measured with just a pulse through the foot.

The QardioBase also has settings specifically designed for tracking weight gain during pregnancy, and it will support multiple users. It detects different users automatically based on weight and body composition, and it will connect to multiple apps on different devices so each person in a family can make use of the QardioBase's features.

App

Setting up the QardioBase using the app was a simple process for me. I downloaded the app, created an account, stepped on the scale, and followed the instructions. My QardioBase connected to my Wi-Fi network right away and I haven't had any problems since -- data is always reliably transferred to the Qardio app.

Measurements taken by the Qardio scale are displayed on the screen for a brief moment and are accessible for a longer period of time in the app. The Qardio app connects to the scale and displays the information for the most recent reading, including weight, body fat percentage, muscle percentage, body mass index, and weight loss targets.

qardiomainview
A "Notes" section lets users insert pre-defined or custom notes for reference later, such as "I'm on a good streak" or "Went off track this week."

The app interface is plain, but easy to read. It also offers sections that include measurements over time, which can be organized into a line graph or a list of weights compiled by date taken. It includes a view of all days that a weight was taken and a view for adjusting a weight goal.

qardioweightovertime
A Reminders section within the app can be used to remind you to weigh yourself each day, which is useful because it's ideal to take a weight measurement at the same time each day in the same conditions to avoid variations introduced by clothing or slight differences in water retention during the morning and the night.

For people who would rather not track things like body mass index and body composition, the app offers settings to configure the QardioBase. A weight only feature will exclude body mass index and body composition, and there's an option for tracking weight through a pregnancy.

goalset
The app will also include measurements from the QardioArm blood pressure monitor if you own one of those, and it has features for connecting to friends and family, entering doctor information, updating QardioBase firmware, and getting support.

Bottom Line

I first saw the QardioBase at CES in 2015, and I was taken with the simple design and the personality of the scale. That's still true today, so it was a disappointment when it didn't quite live up to my expectations.

I love a scale that winks at me and smiles when I step on, but the cute factor doesn't quite outweigh the small inaccuracies I experienced when taking my weight and the bigger problem of the unstable scale base. The wobbling is just plain scary at times if you mistakenly step on the edge or don't align your feet properly.

qardiobasefinal
The QardioBase was never significantly wrong about my weight, but it did often give slightly different measurements even when those measurements were taken at the same time. That's not something that's going to bother most people, but for those who are looking for extreme accuracy, it's a problem.

Accuracy can be fixed through firmware updates, but the unstable hardware design can't be fixed. The QardioBase is cute and it can be a useful tool for keeping an eye on overall weight, but it's not the best smart scale on the market. Potential QardioBase buyers need to be aware of the downsides and should aim to test it out by purchasing from a company with a generous return policy.

Pros:

  • Great design
  • Smiley/sad face is cute
  • Measures weight and body fat
  • Easy setup, connected app works well
  • Supports multiple users
  • Integrates with Apple Health

Cons:

  • Unstable
  • Takes 8 AAA batteries
  • Gives varied measurements

How to Buy

The QardioBase can be purchased from the Qardio website for $149.99.

Top Rated Comments

pgiguere1 Avatar
88 months ago
For the same price (or cheaper on discount, it's currently $99 at Best Buy), you could pick up the Withings Smart Body Analyzer which has the same feature set and more (heart rate, air quality, weather) and a similar minimalistic glass design that's actually stable.
Score: 3 Votes (Like | Disagree)
pittaman Avatar
88 months ago
I like their blood pressure device for its simplicity, accuracy and accompanying app. Not so sure I want to spend over $100 for a smiley face.
Score: 1 Votes (Like | Disagree)
Ad13 Avatar
88 months ago
I couldn't agree more. I bought one of these alongside the QaardioArm. I've had nothing but problems with the scale and its accuracy, fluctuating around 5 pounds taking one reading after another. Had it replaced but it took nearly a month to arrive.

I'm astounded how the design was ever signed off. It's so unstable and wobbles it's unreal. The legs are too far towards the centre and throws you off every time you try and mount and dismount the scale. This must have been fed back at testing stage??
Score: 1 Votes (Like | Disagree)
weave Avatar
88 months ago
I got one and haven't been very happy with it. I think it's a defective unit, but I've been getting the runaround with Qardio support on getting a replacement. I've been on the phone with them a number of times trying different things, then told to wait for the next firmware or app update -- which still doesn't fix it. Basically it never transmits the weight and displays "wifi error" despite me configuring it to my apple time capsule router over and over. But I took it to work and it connected to a Cisco router and worked just fine. Is it really incompatible with Apple wifi units? Can't be.... but it just won't work with mine for whatever reason.

It also acts wonky when trying to reset it or reconfigure it. Sometimes it hangs and I have to remove batteries to get it to work. It's maddening. I often have to mess with it for ages just to get a weight out of it.

Sounds obviously like a defective unit. Now if they'd only admit that and ship me a replacement.... :-(

Maybe I just got a bad unit and the rest of them are fine. Just be warned that if you do get a bad unit, don't expect them to just ship you out a replacement without a lot of hassle first.

Edit: Oh here's a hoot. I was actually told I need to make sure my iphone is on the same wireless network as the qardio base is on. Don't sound too bad? Well all modern routers support both 2.4ghz and 5ghz radios, as does my iPhone. 5ghz is preferred because it's faster and less crowded spectrum. But the Qardio only has a 2.4ghz radio -- so if you want it to work with your phone, you have to make sure you don't associate with your 5ghz network. Ridiculous.
Score: 1 Votes (Like | Disagree)
weave Avatar
88 months ago

You don't have a defective unit. I have returned mine twice and it still has all the same horrible issues as yours
Wonderful. How can they release a product targeted to Apple users that doesn't work with Apple Time Capsule wifi stations? :-(
Score: 1 Votes (Like | Disagree)

Popular Stories

ipad pro m1 feature

Gurman: Apple Event This October Remains Unlikely, No Touch ID for iPhone 15

Sunday October 2, 2022 6:41 am PDT by
Apple is developing new iPad Pro, Mac, and Apple TV models, and at least some of these products will be released in October, according to Bloomberg's Mark Gurman. However, Gurman continues to believe that Apple is unlikely to hold an event this month. In the latest edition of his Power On newsletter, Gurman said "the big iPhone 14 unveiling last month was probably it for Apple in 2022 in...
maxresdefault

Apple Responds to Video Testing Crash Detection Feature With Junkyard Vehicles

Friday September 30, 2022 9:11 am PDT by
The Wall Street Journal's Joanna Stern recently traveled to Michigan to test Apple's new crash detection feature on the iPhone 14 and Apple Watch Ultra. In response, Apple provided some additional information about how the feature works. Stern recruited Michael Barabe to crash his demolition derby car with a heavy-duty steel frame into two unoccupied vehicles parked in a junkyard — a 2003...
Hero0005

Best Apple Deals of the Week: M2 MacBook Air Hits New All-Time Low Price at $1,049, Plus Sales on AirPods Pro and More

Friday September 30, 2022 9:05 am PDT by
This week's best Apple deals focus on the AirPods Pro, AirPods Pro 2, and M2 MacBook Air, including numerous all-time low prices on these devices. You'll also find up to 50 percent off discounts on Anker and Eufy accessories on Amazon. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment, which helps us...
Apple SIM Card

Apple SIM No Longer Available for Activating New Cellular Data Plans on iPads

Sunday October 2, 2022 8:04 am PDT by
As of October 1, Apple SIM is no longer available for activating new cellular data plans on supported iPad models, according to an Apple support document. Introduced in 2014, the Apple SIM was designed to allow iPad users to activate cellular data plans from multiple carriers around the world. Initially, the Apple SIM was a physical nano-SIM card, but it was embedded inside later iPad Pro...
iphone 14 pro max vs 13 max 2

Camera Comparison: iPhone 14 Pro Max vs. iPhone 13 Pro Max

Thursday September 29, 2022 7:44 am PDT by
The iPhone 14 Pro and Pro Max introduce some major improvements in camera technology, adding a 48-megapixel lens and low-light improvements across all lenses with the new Photonic Engine. We've spent the last week working on an in-depth comparison that pits the new iPhone 14 Pro Max against the prior-generation iPhone 13 Pro Max to see just how much better the iPhone 14 Pro Max can be. Subscrib ...
iOS 16 Wallpaper Spectrum Feature

Five Wallpaper Apps to Check Out for iOS 16's New Lock Screen Depth Effect

Thursday September 29, 2022 9:08 am PDT by
One of the biggest new features in iOS 16 is a completely redesigned iPhone Lock Screen. The new Lock Screen is entirely customizable, letting you change the colors and fonts, add widgets and new wallpapers, and more to make your iPhone uniquely yours. Of course, even before iOS 16, you could customize your Lock Screen with a wallpaper of your choice. iOS 16 takes the Lock Screen wallpaper...
top stories 1oct2022

Top Stories: Stage Manager Expands to Older iPad Pro Models, No October Apple Event?

Saturday October 1, 2022 6:00 am PDT by
While we had been expecting a follow-up October Apple event focused on Mac and iPad announcements, it sounds like we might not be getting another event after all. Instead, the pending updates in those product segments could be considered minor enough that they may be announced via press releases. It wasn't all bad news, however, with Apple announcing that it will be expanding an on-device...
iOS 16

Apple Preparing iOS 16.0.3 With More Bug Fixes Following iPhone 14 Launch

Monday October 3, 2022 7:53 am PDT by
iOS 16.0.2 was released last month with several bug fixes for iPhone 14 issues, excessive copy and paste permission prompts, and more. Now, evidence suggests that Apple is planning to release iOS 16.0.3 with additional bug fixes. Evidence of an upcoming iOS 16.0.3 software update has shown up in MacRumors analytics logs, which have been a reliable indicator in the past. There are several...
dynamic island alan dye

Apple Executives Talk About iPhone 14 Pro's Dynamic Island in New Interview

Sunday October 2, 2022 10:48 am PDT by
In a new interview, Apple's senior vice president of software engineering, Craig Federighi, and Apple's vice president of human interface design, Alan Dye, sat down to discuss the thinking behind the iPhone 14 Pro's Dynamic Island and how it was developed. During the interview with the Japanese magazine Axis, Federighi, who oversees the development of iOS, said Dynamic Island represents the...