There are few wearable categories that offer up such a dizzying number of options as the fitness tracker. The number of models and brands is ever increasing, from Fitbit, Garmin and Misfit, picking between them is getting increasingly tricky.
While the previous crop of activity trackers just offered step and sleep tracking, newer bands include built-in heart rate monitors, increased sensors, waterproofing, GPS and smartphone notifications – making the latest bands hybrids between fitness trackers, running watches and smartwatches.
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Other features to take into consideration include the accompanying app software, battery life and the ease with which you can sync your data back to your phone or the web.
Make the right choice however, and this small bit of tech can have you living healthier and feeling better. That's where we come in...
Why buy a fitness tracker?
While the fitness tracker has exploded in popularity, it's well worth taking a second to consider what you want from it. Many of the enquiries we get at Wareable from readers looking to buy a fitness tracker come from skewed notions about the data on offer.
Fitness tracker misconceptions
However, fitness trackers are often surrounded by misconceptions, partially fuelled by the opaque language and promises by manufacturers.
While many fitness trackers will record bursts of activity, they are not adept to advanced metrics from specific sports. Those who do swimming, Zumba and pilates, for example, will only get a report of the movement or heart rate from those sessions and the calorific burn – not a break down of their performance.
Another common misconception is about running and cycling. Without GPS, fitness trackers can't really accurately report on your pace or distance, and are therefore vastly inferior to a running watch. They can, however, offer a basic guide to your workouts.
Things are getting better. In our recent testing, the Misfit Shine 2 tracked a run accurately in comparison to our running watch. What's more, the lines are starting to blur – with the Garmin Vivosmart HR+ and Samsung Gear Fit2 both backing GPS on the wrist.
Most trackers though offer an adequate guide for occasional joggers, but are far from a training tool.
Choose the right design
While most trackers wrap around your wrist, there are dongles that clip on to your clothing and can be more comfortable to wear. Some trackers like the Misfit Shine 2 and the Withings Go can also be worn on clips or in pockets. The Misfit Ray comes with a host of different stylish accessories that'll even let you wear the tracker around your neck like a pendant.
Essential reading: Fitbit Charge 2 vs Garmin Vivosmart HR+
And while the choice used to be about what colour band you went for, or whether it had a screen, smart analogue watches are now offering even more choice. Fitness tracking smarts packed into normal-looking watches is a big trend, with Fossil Q, Skagen Hagen Connected and Withings leading the way. The new Withings Steel HR is especially special with continuous heart rate monitoring and 28 days of battery life.
There are a handful of fitness trackers that can be taken into the pool and report on your swimming sessions. The Misfit Shine 2 (and its Speedo Shine brethren) will track lengths in the pool, while the Withings Go can record duration and calorie burn. Fitbit has also come to the party with the Fitbit Flex 2, the first waterproof tracking, albeit with simplified swimming metrics.
Read this: Waterproofing and wearables explained
Moov Now will detect strokes and offer data on your technique, offering a lot more for obsessed swimmers. Neither can detect heart rate in the pool – for that you would have to move into proper sports watches. Even then, it's not all that great.
Understanding heart rate tech
Heart rate tracking on activity bands is now commonplace and provides a big boost in accuracy in terms of the calorific burn from your day. However, the type of tracking differs hugely.
The Fitbit Charge 2, for example, tracks your heart rate 24/7 and makes a note of your resting heart rate when you wake up – which is a huge metric of your improving health. It will also track your heart rate over a timed session.
In terms of comprehensiveness the Fitbit Charge 2 is one of the best options, as it includes a heart rate monitor for 24/7 bpm readings, live monitoring of exercise and VO2 Max too, so you can quantify your fitness. The Garmin Vivosmart HR range does much the same, and both place a priority on resting heart rate progress and a measure of your underlying health.
The Garmin Vivosmart HR, Vivosmart HR+, and Polar A360 all follow suit, and not only track workout sessions not your daily health. The JayBird Reign is currently the only available tracker that's able to measure heart rate variability, which can tell you how well recovered you are for your next training session.
To screen or not to screen?
Opt for a band with a built-in display and you can keep an eye on the time and your fitness goals without firing up a phone app.
Fitbit decided to add an OLED to display to its Charge 2 while the The Fitbit Blaze got a tidy 1.25-inch 16 colour display, which pays off when it comes to guided workouts and notifications. The likes of the Garmin Vivosmart and Gear Fit 2 offer curved OLED displays, but information is limited.
A display usually adds a few pennies to the price-tag though, so think long and hard whether you actually need one.
How much data do you need?
Steps taken and sleeping are the two main areas of focus for the majority of trackers, though each band's relative accuracy is difficult to assess - these fitness trackers weigh up your movement during the day and the night and try and guess how far you're walking and how well you're sleeping.
The bottom line is that the technology in today's trackers is good but not perfect. Until GPS tracking becomes the norm in fitness trackers use them as motivational aids rather than scientifically accurate monitors.
Many trackers can also make note of your workouts, swimming sessions, cycling and other types of exercise, though you'll typically need to tell your tracker what you're doing each time. The Misfit Shine 2, for example, which can be worn on your clothes or your wrist, needs a triple-tap to enter activity mode.
The app is as important as the band
The mobile app that comes with your tracker is a vital part of the equation, letting you crunch through your data, set goals, challenge your friends and so on.
First and foremost, check that your tracker works with your mobile phone of choice - most now support both Android and iOS.
Fitness tracker essentials
- How your fitness tracker measures daily stepsFrom the sensors to the algorithms, this is how your fitness tracker works its magic
- The biggest wearable tech myths debunkedDon't believe everything you hear: Fitness tracker facts and smartwatch sense
- Best trackers for swimming ranked and ratedWe find out if the current crop of swim-friendly trackers are fit for the pool
- Best gyms trackers pushed to the limitsWe see if the current crop of gym-friendly trackers are fit for a workout
There can also be a huge discrepancy in terms of the quality between a brand's Android and iOS apps. Misfit's Android app was previously short of features compared to the iOS version, which will be of huge frustration to users who have bought there device, so check the app reviews before buying.
It's always wise to check the comments from users of the app, and of course never make a purchase without reading our reviews first.
Battery life and charging
Battery life is an important factor to take into consideration, as having to charge your band every few days can be a real thorn in the side of your attempts to track your fitness regime, and crucially can mean you need to leave it at home or it runs out during a working day.
Bands now fall into two camps: those that require charging every five (ish) days via a USB cable and devices that use a watch battery that lasts around six months.
The Misfit Shine 2, Misfit Flash, Withings Go, Jawbone UP Move and Moov Now all use watch batteries that will need changing every six months.