It can be difficult to know where to start when looking for the best fitness tracker for you. There's such a breadth of choice, from slim and stylish options offering the basics to chunkier options with features like GPS.

That's where we come in though. We've rounded up the top activity trackers available to buy today that we've reviewed here at Pocket-lint. We've got separate features for best smartwatches and best GPS sport watches too in case you want something a little more.

If you're after a device to count steps and calories, monitor sleep and perhaps even have the added bonus of reading heart rate or offering connected GPS, you've come to the right place.

The best fitness tracker to buy today

Here's the best fitness tracker on the market at the moment balancing ease of use with price and all round features...

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Fitbit Charge 3


View offer for £129.99 on Amazon UK | View offer for $149.95 on Amazon US


The Fitbit Charge 3 is a fantastic evolution for the Charge family. The third-gen model adds water-resistance, a lighter build, touchscreen interface, and more features, cementing this as the fitness tracker to consider if a smartwatch isn't for you. The Fitbit platform is brilliant, as is the battery life of the Charge 3, and it delivers great, accurate activity and sleep tracking. 

There is no built-in GPS and the built-in SpO2 monitor is not useable as yet, but the Charge 3 offers plenty for its very reasonable price tag including interchangeable straps for those that want to smarten it up and smartphone notifications alongside all its fitness features. It's an excellent fitness tracker.

The best of the rest...

The Fitbit Charge 3 isn't for everyone though. Luckily, there are plenty of other great fitness trackers to consider that we've reviewed if you want to get up, start moving and stay ahead of the game. Here are a few other fitness trackers that are worth considering:

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Garmin Forerunner 645 Music


View offer for £380 on Amazon UK | View offer for $445 on Amazon US


The Garmin Forerunner 645 Music is more sports watch than standard activity tracker but it offers song storage, waterproofing, changeable straps, heart rate, GPS, altitude, cadence and motion so it is a great option for those all about data.

It offers the functionality of most smartwatches with notifications and functions, while offering excellent sports and activity tracking, a compact design for this style of activity tracker and it is comfortable to wear whilst also being compatible with Bluetooth headphones. It's very expensive when compared to the likes of the Fitbit Charge 3 however and while the battery life is better than many smartwatches, it isn't better than the likes of the Charge 3 or Alta HR. 

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Fitbit Versa


View offer for £178 on Amazon UK | View offer for $199 on Amazon.com


The Fitbit Versa takes a couple of steps closer to smartwatch territory than the Charge 3, offering a coloured display, NFC for Fitbit Pay and many smartwatch features, including some third party apps. There is a heart rate monitor, an altimeter and the Versa is waterproof too.

Like the Charge 3, it misses out on built-in GPS, offering connected GPS instead, but it allows you to connect to Bluetooth headphones for listening to music and it offers all the excellent features of the Fitbit platform. You'll pay more for this device than the Charge 3 but if you want something more substantial without going full smartwatch, the Versa is a good option.

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Garmin Vivosmart HR+


View offer for £113 on Amazon UK | View offer for $99 Amazon US


The Garmin Vivosmart HR+ stuffs a lot of functionality into a device that's only a little larger than some other fitness tracker bands on this list, and significantly smaller than some others. It isn't as good looking as Fitbit's latest devices, but it's the feature set that appeals, with both heart rate monitoring and GPS on board.

The Garmin Vivosmart HR+ is an ideal device for someone who wants to track daily activity as well as record runs or walks in more detail, but doesn't want to go the whole hog and start wearing a running watch all the time. 

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Fitbit Alta HR


View offer for £119 on Amazon UK | View offer for $129 on Amazon US


The Fitbit Alta HR brings heart-rate tracking to its slim and stylish fitness tracker, the Alta, positioned a little further down this list. The earlier device is fabulous for basic tracking but it misses out on a couple of features, primarily heart rate monitoring.

There is still no waterproofing, GPS or elevation data and the Alta HR isn't as feature rich as the larger and newer Charge 3, but it offers a slim, stylish everyday activity tracker with good heart rate tracking and general day-to-day activity monitoring. Sleep tracking is also great and it comes with the same interchangeable straps as the original Alta so you can switch bands out for a smarter look.

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Samsung Gear Sport


View offer for $249.99 on Amazon US


The Samsung Gear Sport is like the Garmin Forerunner 645 Music in that it is more watch than activity tracker but it is still packed full of features including waterproofing, heart rate and built-in GPS. It also offers fully-fledged smartwatch capabilities and on board storage for music.

Like the Garmin Forerunner 645 Music though, you won't get the battery life of devices like the Fitbit Charge 3 and Fitbit Alta HR and sleep tracking isn't as accomplished on the Samsung Gear Sport as it is on the smaller fitness trackers either. It's also pricier than the standard fitness trackers on this list.

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Fitbit Flex 2


View offer for £59 on Amazon UK | View offer for $59 on Amazon US


The Fitbit Flex 2 is a simple yet effective tracker with a more exciting design than its predecessor, meaning it looks less like a boring rubber band especially when paired with the interchangeable accessories. The far better two-pin clasp ensures a solid, comfortable fit and the addition of basic smartphone notifications and waterproofing is also great.

The Fitbit Flex 2 has a good thing going on: it's simple, stylish and unobtrusive. It won't be for those who want more data such as heart-rate or GPS tracking, but it's a great device for those after basic tracking. 

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Fitbit Ionic


View offer for £236 on Amazon UK | View offer for $269 Amazon US


The Fitbit Ionic not only brings a solid, lightweight design with a beautiful screen, it also adds built-in GPS and dedicated swim functionality that the earlier Blaze, was lacking. With a new and improved heart-rate monitor, smart notifications, payment capability and all the features Fitbit users will have come to know and love, the Ionic is Fitbit's strongest smartwatch yet.

It's not cheap though and there are a few annoyances, such as the lack of advanced smartwatch features. The Ionic successfully bridges the gap between fitness tracker and smartwatch though so if you're looking for a device that fulfils both these categories, this might be the one for you.

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Suunto 9


View offer for £435 from Amazon UK | View offer for $599 from Amazon US


The Suunto 9 is a big sports watch so it won't be suitable for everyone but it offers an excellent battery life - 10 days - along with 100m water resistance and multiple sports tracking with plenty of detail in the breakdown.

The app isn't as good as Garmin or Fitbit alternatives and the design isn't as stylish as others on this list either but the Suunto 9 is an accomplished multi-sport watch that is brilliant for triathletes.

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Fitbit Alta


View offer for £99.99 on Amazon UK | View offer for $99 on Amazon US


The Fitbit Alta is one of the most stylish of the Fitbit bunch, like its more capable brother the Alta HR and especially when paired with the additional straps. It isn't as feature rich as some of its siblings, missing out a few key functions, such as heart rate monitoring, elevation data, GPS and waterproofing but for basic activity tracking, it's a fabulous device.

Accuracy of step tracking is good, smart notifications are useful, the OLED display is lovely and the Fitbit app is one of the best out there. For some the Alta will be a little too basic, but for others, it will be a winner, especially in terms of its looks.

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Garmin Vivomove


View offer for around £97 on Amazon UK


The Garmin Vivomove is a wearable for those who want tech to infiltrate their lives in a less obvious, attention-seeking manner. It's an activity tracker that carries out its job in an understated manner - a wearable that will get you moving without looking like you're making an effort, and offer encouragement on the most basic of fitness goals - increased movement.

Even when compared with other simplistic analogue activity trackers, the Vivomove is in a league of its own when it comes to design. It's a stunning piece of kit. If there was a vibration motor for smartphone notifications, a heart rate monitor and a more robust app to back it up, this would be the ultimate offering of its type.

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Withings Activité Steel HR


View offer for £60 on Amazon UK | View offer for $71.99 on Amazon US


The Withings Activité Steel HR is a beautifully designed device that does a great job of delivering style and smarts in a one package. It offers a classic design with premium materials and it's certainly an activity tracker that steps away from the standard glorified rubber band look of many competitors.

Heart-rate tracking is good, as is sleep tracking, while the battery life is excellent. The design isn't as subtle as the likes of the Fitbit Alta HR, which offers the same features bar the waterproofing and swim tracking, and the Steel HR doesn't do sleep tracking in as much depth as the Alta HR either. That said, if you want heart-rate monitoring with some added analogue appeal, this Withings number is a great choice.

We're also in the process of reviewing the newer model - the Steel HR Sport - that offers connected GPS and Vo2 Max so look out for that model in this round up when we've concluded our testing.

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Samsung Gear Fit 2


View offer for £144.99 on Amazon UK | View offer for $229.95 Amazon US


The Samsung Gear Fit 2 features excellent built-in GPS and heart-rate monitoring, along with a beautiful large screen that is not only nice to look at but responsive too.

It has core tracking skills and relayed data but the accompany app isn't as good as the likes of Fitbit so it might not be quite right for the more serious fitness fans, or hardened runner. The battery life is also so-so when exercising. Overall though, it's a fab first wearable.

It's worth noting that we are currently reviewing the Gear Fit 2 Pro which offers enhanced water resistance and improved heart rate tracking over the Gear Fit 2 so we will be adding that to this round up when we have finished our review.