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).

Multiple accounts

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.

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.

Best scales 2018 - smart scales reviews

Nokia Body Cardio

Nokia Body Cardio
  • Rating: ratingsratingsratingsratingsratings

Measures: weight, BMI, body composition (fat, muscle, water & bone mass), standing heart rate

Users: 8

Colours: White and Black.

Withings (which has since been brought under the Nokia brand) was one of the first manufacturers of smart scales, and the Body Cardio offers a wide range of health measurements. It also offers a lite-version, the Body.

Make sure you are buying the right Nokia scales when looking at the best online prices: the range goes from the basic Body scales up to the most sophisticated Body Cardio scales.

The scales sync well with the Nokia range of activity trackers, such as the inexpensive Go and the waterproof Steel, which looks like a normal analogue watch but measures basic activity data. See our round up of the best waterproof activity fitness trackers.

Unlike other scales the Nokia scales display your previous day’s step count and a trend graph right there on the scale display. When the Body Cardio scale is connected over Wi-Fi it even provides a daily local weather forecast – handy for runners and outside exercisers. If you don't use a Nokia activity tracker you can still sync your phone's step counter to the Nokia Health Mate app.

The Body Cardio originally monitored something none of the other smart scales could - Pulse Wave Velocity (PWV), a measurement that is a key indicator of cardiac health. Unfortunately, blaming regulatory issues, in January 2018 Nokia used a software patch to withdraw all support for PWV from the Body Cardio, removing one of its key appeals - and the biggest reason to opt for the Cardio over one of the cheaper Nokia Body scales.

Body Cardio connects to the free Nokia Health Mate app (iOS and Android) and automatically syncs data after every use of the scale. Graphs help users visualize trends over time and note how their weight impacts overall health. After a few weeks, users should be able to see how their lifestyle impacts their PWV.

The app's home screen is clear and concise, showing you your health stats in one easy glance, including  steps either from your Nokia activity tracker or from your phone's step counter.

Withings Body Cardio app

Users can set goals, earn rewards over time and celebrate health milestones. Health Mate also offers integration with 150 partner apps to provide nutrition tracking, GPS run tracking and more to make it an integrated health aid. All Body Cardio data stored in the Health Mate app integrates with the Apple Health app.

Our one complaint about the Nokia scales is the graphs on the app. When you go into more detail some of the graphs turn into quite confusing squiggles, where a simple trend line would have sufficed.

Body Cardio features a rechargeable battery rather than running on four AA batteries like the other scales tested here. Nokia claims that this should last a year.

Verdict: The Nokia Body Cardio does pretty much everything a smart scale can. It syncs with Nokia's 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.

However, since Nokia has removed PWV support from the Cardio, you might be just as happy with the cheaper Body+, which now has an almost identical feature set from as little as £69 or $99.

Body Cardio specs: 35cm x 35cm square, by 2.85cm height. Body Cardio syncs via: Bluetooth and Wi-Fi

Fitbit Aria 2

Fitbit Aria 2
  • Rating: ratingsratingsratingsratingsratings

Measures: Weight, BMI, Lean Mass, Body Fat Percentage.

Users: 8

Colours: White and Black.

The most popular activity trackers are made by Fitbit (see our which Fitbit is best feature for full details of its range), and the company has a set of smart scales that wirelessly sync with its mobile app and desktop dashboard tools.

Like most of the smart scales reviewed here the Fitbit Aria 2 is powered by three AA batteries.

The Aria 2 is stylish, available in chic black or white, and topped by 0.3 inches of glass.

As soon as you step on the Aria 2 it starts measuring your weight and calculating BMI etc through knowing your height and other personal statistics via your Fitbit account.

Fitbit Aria scales app

It then identifies you and displays your weight and body fat percentage. You can set up the Aria 2 to recognise up to eight individual users, so it works for even the largest families. Everyone’s data is private, and available only by their own Fitbit accounts. Each person is identified by their own little icon.

The app's interface is clear and can show data in attractive graphs. Setting goals for individual metrics is also simple.

You don’t need to be a Fitbit tracker user to own the Aria 2 scales, but it makes a lot of sense as the data sync is so good, and exercise monitoring is one of the best ways to help you get to and maintain a healthy weight, BMI and Body fat Percentage it has the major metrics you'll look at more often. However, if you want to see bone mass or water content you'll need to look elsewhere.

Synced with all the other activity data it should give Fitbit users a pretty holistic view of their health metrics. It doesn't have the ability to shows as many of the health metrics as some of the other scales reviewed here, but with weight the main focus for most people this shouldn't matter.

If you want as many body stats as possible go with the Nokia Body Cardio.

Fitbit dashbaird data

Verdict: The Fitbit Aria 2 is the natural choice for existing Fitbit users as it syncs so well with their Fitbit app and dashboard. But you don’t need to be a Fitbit tracker user to choose the Aria, although you will need to set up a free account there. It looks great, and the LED display is clear and easy to read. We found the Aria 2 to be accurate in its readings, as long as you position it in as close as you can to the same place each time. It doesn't, however, measure as many health metrics as some of the other smart scales reviewed here. If you want more metrics and are a Fitbit user then you'll need to buy a different scale and input your weight into the Fitbit dashboard manually. If you're happy with just weight and BMI then the Aria 2 is a great choice.

For more details read our full Fitbit Aria 2 review.

Specs: 31.2cm x 31.2cm square, by 3.4cm height.

Syncs via: Bluetooth and Wi-Fi

Buy the Fitbit Aria 2 at Amazon

Qardio QardioBase

Qardio QardioBase
  • Rating: ratingsratingsratingsratingsratings

Measures: weight, BMI, body composition (fat, muscle, water & bone mass)

Users: 8

Colours: White

One of our favourite wireless internet scales is the circular QuardioBase Smart Scale from Qardio. It looks great, gives very fast readings, includes most health metrics, and has a clear, simple app.

The QardioBase measures weight, BMI, and full body composition (body fat %, muscle, water and bone mass). It doesn’t measure heart rate like the Nokia Body Cardio, but the better activity trackers will do this for you anyway.

It can connect to the smartphone app (Android, iOS, Kindle) via Bluetooth and Wi-Fi (2.4GHz), and the simple setup is completed using the app. Users with visual impairments will appreciate the fact that the app has full voice functionality.

The app is clear and simple to use. We preferred its historical data graphs to the slightly confusing Nokia charts. It beats the Fitbit Aria scale with its full body-composition measurements, but Fitbit tracker users would need to manually input the weight readings to their app.

QardioBase app

This scale will give you encouraging smileys when you’re progressing towards your weight goal, and can even give haptic feedback – gentle vibrations that let you know your weight has been taken and stored in the app.

QardioBase is compatible with Apple Health and Apple Watch, and integrates with Google Fit and S Health.

Up to eight people can be set up with each scale, and each is private.

There is a special Pregnancy Mode so expectant mothers can track their progress and even add photos to each measurement. There’s also a cutback mode that is best for people with implanted devices such as pacemakers.

We did find the scale a bit wobbly at first (probably caused by the stylish but less-stable circular design – Qardio may be guilty of form over function here), but four extra feet are included so you can customise to your floor. It works on carpet, but – as with all scales – is best on a flat and hard surface when you weigh yourself.

This digital scale requires 8 AA batteries, which should keep the scale going for a year. It comes with a generous three-year warranty and a 60-day money-back guarantee.

You can buy direct from Qardio or from online retailers such as Amazon UK or Amazon.com, where you might find some discounts.

iHealth Core

iHealth Core
  • Rating: ratingsratingsratingsratingsratings

Measures: weight and body mass index, body fat, lean muscle, bone mass, water weight, daily calories and visceral fat rating (VFR).

Users: 20

Colours: White

“You are more than just a number, you are beautiful!” says the iHealth scale when you open the box. This is a nice message as it reminds you that whatever the data the scales give you, you shouldn’t hate yourself for them. Get more healthy, change those numbers, for sure – but don’t let your life be absolutely ruled by them.

There are two models available: the iHealth Core (HS6) and iHealth Lite (HS4). You can still find the older Body Analysis Scale (HS5) available online, but this has now been officially replaced by the Core, which has much the same features but a better (if heavier) design.

As it can be synced via Wi-Fi the iHealth Core allows the device to be used by a family much easier as it recognises the user without the phone present. It also pairs via Bluetooth if that’s your preferred connection.

The Lite version measures just weight and BMI, and connects only via Bluetooth.

Like the other smart scales reviewed here the iHealth scales wirelessly sync with a mobile app (iHealth MyVitals, on iOS and Android) to graphically and statistically display your latest and historical data, helping you track your progress.

iHealth Core app

Setup is pretty easy, and you can start using it straight away after registering with the app.

Once connected to the iHealth MyVitals App an algorithm can calculate an estimate of your optimal calorie intake for Core users; Lite users will need to manually input this data.

The scales keep up to 200 measurements in its internal memory, so you don’t have to sync every time you step on the scale.

Both can support the highest number of individual users (20) of all the scales reviewed and tested here. Each can set their own goals and monitor their stats on their own apps.

The iHealth scales are part of a wide family of iHealth gadgets, including an activity tracker (the iHeath Wave that notably tracks your swimming as well as steps and so on), oximeter, and blood pressure monitors. Read our iHealth Wave review for more on all these iHealth products.

With this medical angle you can share the information from the scale with your doctor or caregiver if you wish.

Verdict: 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.

iHealth Core specs: 35cm x 35cm square, by 2.85cm height. Syncs via: Bluetooth and Wi-Fi

Buy the iHealth Wireless Core Scale at Amazon.

Koogeek Bluetooth Wi-Fi Smart Health Scale

Koogeek Bluetooth Wi-Fi Smart Health Scale
  • Rating: ratingsratingsratingsratingsratings

Measures: weight, BMI (Body Mass Index), body fat mass, lean mass, bone mass, total body water, BMR (Basal Metabolic Rate) and visceral fat.

Users: 16

Colours: White

The Koogeek Smart Health Scale measures a ton of health-related metrics. It's difficult to see any it misses out on, and it's available at great prices online.

The Koogeek Scale boasts a stylish modern look, and has a large blue LED display you can’t miss.

It syncs with the Koogeek mobile app (Android and iOS), which displays your weight and other stats in various ways with attractive graphs and historical weight data so you can quickly see your weight trends.

The Koogeek app takes activity data from Apple’s Health app, so you can use this to simultaneously monitor your steps – no need for an extra activity tracker as this uses your iPhone as the step measurement device.

You can view the Steps measured by Apple Health from within the Koogeek app, but it doesn’t send weight data back to Apple Health.

Koogeek app stats

The Koogeek scale can handle up to 16 individual users – but don’t all try to stand on the scales at the same time!

Here’s a great feature for new parents. You can use the scale to measure your baby’s weight, by first weighing yourself then step on the scales again with baby. Koogeek’s app can then check your child’s weight trend.

Set up wasn’t as easy as we found with some of the other scales tested here. We got it eventually but you have to jump through a few hoops getting there. For example, you can’t use the Bluetooth function of the scales if you have other Bluetooth devices active within range of the scales. So if you have an activity tracker on this will stop the Koogeek scales from finding a Bluetooth connection, which is annoying. Indeed any Bluetooth device within range stops the Koogeek’s Bluetooth working.

As some of the other scales tested here don’t have a Bluetooth connection it’s not a big deal, unless of course you don’t have access to a Wi-Fi network at home.

Instead you link the Koogeek to your Wi-Fi, and it syncs with its mobile app that way. Once set up (it took us a few attempts) it works fine.

Other online reviews suggest that it wasn’t just us having setup problems, and this is one area that Koogeek could certainly improve. Some of the app’s English is not so good, but not incomprehensible.

Verdict: The Scale is well built and stylish in looks, and one of the least expensive tested here. It shows your step count by taking this data from Apple's Health app for iOS users, although it can't transfer data the other way. While we liked the design and measuring accuracy, plus the app's look and feel, we did feel that it needs some attention to make the basic sync and setup less bothersome.

Specs: 31.5cm x 31.5cm square, by 2.9cm height.

Syncs via: Bluetooth and Wi-Fi

Buy the Koogeek Smart Health Scale at Amazon.

Salter Curve Smart Analyser Pro Scale

Salter Curve Smart Analyser Pro Scale
  • Rating: ratingsratingsratingsratingsratings

Measures: weight and body mass index, body fat, muscle mass, bone mass, water percentage, and Basal metabolic rate (BMR).

Users: 8

Colours: White

Salter is a well-known scales manufacturer, and has been weighing people for nearly 50 years – unlike the new kids on the block with their fancy digital monitors. But Salter has a range of electronic scales to match the best functions of the other smart scales reviewed here.

The Salter Curve Analyser Pro scales have an easy-to-read LED display, which shows you your weight and other metrics when you step on. You can also use the display to input your height, age and gender details.

The instructions go further than most of the scales reviewed here, explaining the metrics, and giving healthy averages to aspire to. Remember that we’re all individuals and depending on your body you may not conform exactly to these generalised averages.

The scales look good, and will fit into to most home environments.

We found setup a little confusing at the start, but we were up and running (or rather standing) reasonably quickly once we had paired the device with our phone via Bluetooth. Other online reviews back us up on these Bluetooth teething problems. It took a couple of goes to get the data to sync from the scales to the Mibody app (iOS and Android).

It worked fine for a couple of days but if you move the scale you have to go through what appears a simple procedure but actually frustrated the hell out of us. Some days – despite a successful pairing via Bluetooth – we could see the weight on the scale's display but it refused to sync with the app. In our opinion this negates the term "smart" in the smart scales stakes.

You use the app to set yourself goals on the various metrics. You can also input other personal data, such as your waist measurement, which some health professionals believe is a better indication of your health (when considered with your height) than your BMI. You can also input your neck, upper arm, chest, thigh, calf and hips measurements. None of the other scales has this ability.

Salter Mibody app

While clear, the app's graphs were a little flat compared to other more visually engaging apps seen with the other smart scales reviewed here.

There are Child and Athlete modes to distinguish between types of user.

Like the iHealth scales the The Salter Curve Analyser Pro can sync with other medical devices such as a blood pressure monitor. It comes with a generous 15-year guarantee, and three AAA batteries.

Verdict: 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.

Specs: 30.6cm x 33.6cm, by 3cm height.

Syncs via: Bluetooth

Buy the Salter Curve Analyser Pro at Amazon.