Everyone’s getting fitness trackers, walking more than 10,000 steps a day, donning the trainers and setting out on a jog recommended by RunKeeper or another of the many exercise apps.
For many of us exercise is as much about weight loss as it is general fitness. All those Fitbit steps go hand in hand with the 5:2 Diet or some other fashionable eating regime because we realise we’re overweight and need to shed a few kilos. You need to look for scales that will help you maintain a healthy weight and look at other health metrics.
A standard set of digital scales will do the trick, but in today’s world of the quantifiable self we appreciate all our data to be digitally collated and presented to us in attractive graphs and charts.
For this we need a set of smart scales that sync with a smartphone app.
Not just weighing machines
Smart scales measure a lot more than our weight. A decent set should also inform us of our Body Mass Index (BMI), lean mass, and body fat percentage. These metrics help us understand what our own best weight should be, as it depends on your height as much as your actual weight in kilos or stones.
When measuring the various health stats remember that these averages are just that, and an individual’s best ranges may differ depending on various factors. If in doubt discuss these with your doctor.
Common health metrics for smart scales include:
BMI – this is a measure that shows if you are a healthy weight for your height. 14 stone (89kg) might be an unhealthy weight for someone of average height, but perfectly acceptable for a 6ft 5in man. Doctors suggest that an ideal BMI for adults is in the range 18.5 to 24.9.
Body fat percentage – this is the portion of your body made up of fat cells. For men aged 20 to 40, 10-20 percent body fat is considered healthy. For older men the range 19-23 percent is good. For women aged 20 to 40, 19-26 percent body fat is healthy. For older women 23-30 percent is good.
Lean mass – a measure of muscle, organs, bones and water, rather than essential or storage fat. Having a high percentage of lean mass boosts your metabolism, making it easier to maintain an overall healthy weight.
Visceral fat – this is fat that exists around your vital organs, and is one of the main risks to long-term health.
Body Water Percentage – the rate of water in body composition. Aim for a body water percentage just over 50 percent. It depends on age as well but men should try to get to a total body water percentage between 50 and 65 percent. The ideal range for women is between 45 and 60 percent.
Bone Mass – bone density is an important health metric because, like muscle, bone is a living tissue that can become stronger with exercise, as well as a healthy diet (calcium and vitamin D). For most people bone mass starts to reduce after the age of 40, and regular exercise can prevent this loss.
Basal Metabolic Rate (BMR) – an estimation of the energy (measured in calories) expended by the body at rest to maintain normal body functions (heart beating, respiration, maintenance of body temperature, etc).
Pulse Wave Velocity (PWV) – currently exclusive to the Withings Body Cardio (though disabled in the US thanks to regulatory issues) this is a measure of arterial stiffness and blood flow rate that is used clinically as a key indicator of heart health and blood pressure problems.
All of the scales reviewed here allow for more than one person to sync their data with the relevant app. This is great if the whole family or flat share want to use the scales.
The scales either use Bluetooth to recognise each user’s phone, or take a good guess at who is standing on them based on previous weight, and this general works well. The only problem can be if some people’s weight is very similar to another’s, which will confuse the scales.
Positioning the scales
Where you place your scales is important, as you’ll get different readings (sometimes out by a few kg or pounds) depending on where it is on the floor. Put it on a flat, hard surface (bathroom tiles work well) if you can, and not on carpet, which will trick the scales into understating your weight.
Some scales (for example, the Salter Body Analyser Scale) can be adapted for use on carpet, and a few others will work well on carpet without needing adaptation (the QardioBase 2) – just make sure to compare the first few results with a hard floor to check they’re consistent.
When to weigh yourself
Your weight and body fat percentage (and therefore other metrics) will change throughout the day so it makes sense to weigh yourself at the same time each day. You should be at your lightest as soon as you wake up.
Wi-Fi or Bluetooth
Some of the scales tested here can connect wirelessly with mobile apps via your home’s Wi-Fi and/or Bluetooth. The advantage of Wi-Fi is that you don’t need to have your smartphone anywhere near the scales when you step on, as you would with Bluetooth-only scales.
1. Withings Body Cardio
The Withings Body Cardio does pretty much everything a smart scale can. It syncs with Withings’ range of activity trackers for all-round fitness monitoring, and can use a phone’s basic step counter if you don’t own a tracker.
The Body Cardio is our favourite smart scale for sheer number of stats and handy info like how much weight you’ve lost or gained since your last weigh in. It’s pricier than the others but offers just about everything you might possibly need. Our only complaint is the squiggly graphs on the mobile app.
It also offers a unique feature: Pulse Wave Velocity tracking, which could help you monitor your heart health. If you’re not fussed o that though, you might be just as happy with the cheaper Body+, which otherwise has an almost identical feature set from as little as £69/$99.
Read our Withings Body Cardio review.
2. QardioBase 2
The QardioBase 2 is as smart as it is stylish, offering a good range of body composition measurements, along with handy unique features like haptic feedback or the emoji display. Our only minor gripe is that the app doesn’t make the most of all the data it gathers, but it does do more than enough for most.
The price is the only sticking point. The QardioBase 2 sits at a premium price point, and while it offers enough features to justify that price, it’s worth remembering that you can get almost as much for a whole lot less from other manufacturers.
Read our QardioBase 2 review.
3. Eufy BodySense Smart Scale
It’s easy to recommend the Eufy BodySense Smart Scale at this price. If you’re looking for an affordable alternative to the top-tier scales from the likes of Fitbit and Withings, this is a great option.
It offers 12 measurements including BMI, body fat percentage, muscle mass and more, and can sync with the Fitbit, Apple Health and Google Fit apps.
Up to 20 users can pair with the same set of scales, each able to set their own goals and track their own history and progression.
It misses out on some more advanced features such as haptic feedback, automatic user detection and the ability to see more than just your weight on the scales itself, but it offers a huge amount more than an ordinary set of digital scales and will be enough for most users.
Read our Eufy BodySense Smart Scale review.
4. Fitbit Aria 2
The Fitbit Aria 2 scales works seamlessly with Fitbit’s dashboard and mobile apps, plus all its activity trackers, such as the Aria, Charge 2 and Ionic. You could use it without the trackers but together they make a great fitness or weight-loss team.
Aria 2 shows less stats than the more expensive Nokia Body Cardio, but everything you need to know at weigh in. It measures weight, Body Fat Percentage and Body Mass Index, and syncs this data wirelessly and automatically to your Fitbit account. If weight loss is one of your fitness goals the Aria 2 is a great tool to combine with your Fitbit activity tracker.
Read our Fitbit Aria 2 review.
5. Eufy Smart Scale P1
There are a few downsides to the P1 – no Wi-Fi, no recharging, and no carpet support – but these are really the sort of premium touches that most people won’t be worried about.
If you want a simple smart scale that will track the core metrics in an easy-to-use app, can cover your whole family, and will sync up to the Google, Apple or Fitbit apps, there’s really no reason to spend more than this.
On the other hand, there’s also little reason to opt for the P1 over Eufy’s own cheaper models like the BodySense, which will let you save a bit of money and only miss out on measurements that you don’t really need – the body age and protein measurements here are nice-to-haves, but don’t offer any deep insight into your health or weight.
Read our Eufy Smart Scale P1 review.
6. iHealth Core
We like the way that the Core and Lite scales interact with the other iHealth products, and the Core offers a bunch of useful metrics with which to monitor your health. Setup is easy and the app’s graphs give a decent visual representation of your health-metric trends as you progress.
Read our iHealth Core review.
7. Koogeek S1 Smart Scale
The Koogeek S1 is a budget-friendly alternative to top tier smart scales, but in this case you really do get what you pay for, from tricky setup to Wi-Fi features that we could never quite get to work – and it doesn’t help that it can’t give accurate readings on even a thin carpet.
It’s not all bad though. This is a low price for a scale that measures everything from weight to bone mass, and once you’ve got it up and running you can sync all the data to Apple Health or Google Fit. There’s also support for up to 16 users and a dedicated mode for tracking the weight of babies or pets.
This can’t match top-end models for features or reliability. But if you can’t afford to drop £100/$100+ on a bathroom scale (and we can’t blame you) then the Koogeek S1 will get the job done, with a couple of quirks.
Read our Koogeek S1 Smart Scale review.
8. Hamswan Bluetooth Smart Scale
While it is certainly much cheaper than most digital smart scales and offers a wide range of body measurements, we find it difficult to recommend a scale with an app that describes a person 1% above healthy as “chubby”. For that reason, we’d keep this away from children and anyone at risk of unhealthy body-perception issues. For adults who want an inexpensive set of digital scales, the Hamswan Bluetooth Smart Scale offers great value and a decent design – although its accuracy has been questioned.
Read our Hamswan Bluetooth Smart Scale review.
9. Salter Curve Smart Analyser Bathroom Scale
Salter is an established brand in non-digital scales. The Curve Analyser Pro looks great and measures just about everything a set of smart scales can. We found initial setup to be hit and miss, and syncing data via Bluetooth sometimes just didn’t work – the whole procedure seems needlessly complicated when it should be step on and everything just works. For this reason we can’t really recommend the Salter scale, which is a shame as it is otherwise an interesting device.
Read our Salter Curve Smart Analyser Bathroom Scale review.
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