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(Pocket-lint) - Fitbit has been around for years, sitting at the top of its activity tracking class, smugly watching as its competitors hope to raise the same sort of brand awareness. For many, a fitness band is simply called "a Fitbit" - such has been the impact of this company - and it's now been bought by Google, to add to its power.

We've broken down each of the Fitbit trackers, looking at how much each costs, what features it offers and why you might consider buying each one. This list is all about helping you work out which Fitbit will suit you and your lifestyle best.

Quick summary 

The Fitbit Inspire is the cheapest fitness tracker in Fitbit's offering, replacing the Zip, Flex and Alta. It offers all-day sleep and activity tracking, smartphone notifications, clock faces and interchangeable straps. It has a touchscreen display, is swim proof and it offers automatic exercise recognition too.

The Fitbit Inspire HR has a very similar design to the standard Inspire but it adds heart rate monitoring, more advanced sleep data, VO2 Max, Goal-Based exercise modes and Connected GPS. Other functions are the same as the Inspire, but it is a little more expensive due to the extra features.

The Fitbit Inspire 2 has a slightly more refined design compared to the Inspire and Inspire HR, offering many of the same features but doubling the battery life and adding Active Zone Minutes and Quick Replies for Android users.

The Fitbit Luxe is a fashion-focused tracker, offering a premium design and coloured touchscreen, along with all the same features as the Inspire 2. It also offers stress management and an SpO2 sensor, but there's no NFC and only Connected GPS.

The Fitbit Charge 4 has everything the Luxe does, but it adds NFC for Fitbit Pay, offers Spotify controls, has an altimeter and has built-in GPS, so it's better at accurately tracking workouts as a standalone device.

The Fitbit Versa 2 moves into smartwatch territory. It offers most of what the Charge 4 has, but it adds apps and built-in Alexa. There's no built-in GPS, but the Versa 2 has phone-free music.

The Fitbit Versa 3 is an upgrade to the Versa 2, adding Google Assistant as an option on top of Alexa, a built-in speaker for taking calls, Pure Pulse 2.0 heart rate technology and most importantly, built-in GPS.

The Fitbit Ionic is more sportswatch in its design than smartwatch. It offers built-in GPS, water resistance up to 50-metres, mobile payments and smartphone notifications, as well as all the features found on other Fitbit devices. No voice assistants though.

The Fitbit Sense is the all-singing, all-dancing Fitbit smartwatch with a number of sensors on board. It has everything the Versa 3 offers, along with an EDA sensor for monitoring stress, the ability to take an ECG and a skin temperature sensor.

The very best Fitbit trackers available right now

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Fitbit Inspire 2

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The Inspire 2 succeeds the Inspire HR and Inspire - below - offering a more refined design with softer, curvier edges and an inductive button over a physical button.

It delivers all the same features as the Inspire HR, including all day activity tracking, advanced sleep tracking with sleep score, exercise modes, female health tracking and smartphone notifications.

It doubles the battery life of the Inspire HR to 10 days however, whilst also adding Active Zone Minutes and Quick Replies for Android users.

The Inspire 2 comes in Black, Lunar White, Desert Poppy.

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Fitbit Inspire

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The Fitbit Inspire is an entry level fitness tracker from Fitbit and it offers basic activity monitoring, including steps and calories burned, along with basic sleep tracking.

There's a display for smartphone notifications and an on-screen dashboard, showing similar metrics to what you would find in the Fitbit app. The Inspire also offers waterproofing up to 50-metres but not swim tracking, and it doesn't have elevation or heart rate monitoring either.

The Inspire is slim and slender and also offers interchangeable straps, allowing for a different look, as well as the ability to clip it to clothing with a specific accessory. It has a five-day battery life. As with all Fitbit devices, the Inspire connects to the Fitbit app via Bluetooth, offering a range of more detailed stats and data.

The Fitbit Inspire comes in two colours comprising Black and Sangria.

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Fitbit Inspire HR

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The Fitbit Inspire HR features a very similar design to the Inspire, meaning a slim and sleek waterproof device with a display for smartphone notifications and progress.

It adds heart rate tracking and swim tracking though, along with a colour-matched buckle for a more secure fastening and it also offers connected GPS, Guided Breathing Sessions, Goal-Based Exercise Modes and VO2 Max.

The Inspire HR also offers more advanced sleep tracking data than the Inspire, though it still lacks elevation data and it doesn't offer Active Zone Minutes like the newer Inspire 2, or as good a battery life.

The Inspire HR comes in three colours comprising Black, Lilac and Black with White.

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Fitbit Luxe

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The Fitbit Luxe offers is the most stylish of the company's trackers, offering a bracelet design, along with accessories like a link bracelet from a jewellery brand.

There's a coloured touchscreen display and the Luxe offers many of the same features as the Charge 4 - below - but it trades built-in GPS and NFC for a more premium design.

There are stress management features on board the Luxe - like the Sense smartwatch - and the Luxe comes with Google Fast Pair too. There's also an SpO2 sensor for blood oxygen monitoring, like the Charge 4.

The Fitbit Luxe claims to have a five-day battery life and it comes in Lunar White/Soft Stainless Steel Gold, Black/Graphite Steel, Orchid/Platinum Stainless Steel and Special Edition gorjana Soft Gold Stainless Steel Parker Link Bracelet.

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Fitbit Charge 4

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The Fitbit Charge 4 is an update to the Fitbit Charge 3, adding in a couple of features, the biggest of which is the inclusion of GPS. Previously you had to use the GPS on your phone, but on the Charge 4 you get that direct from the device, giving location tracking, speed and distance, as well as elevation change from the altimeter.

That makes it a better exercise tracker overall as a standalone device. It also adds in NFC to support Fitbit Pay and Spotify control, although you can't download music to this device.

The battery is rated at 7 days, but this without the GPS - which does have a big impact on the life. It will track GPS activities up to 5 hours, so will cover a lot of events like 5 or 10km runs, but won't cover anything longer - and that will use up a lot of the battery life. 

All the other metrics from the older Charge 3 are included - sleep tracking, steps and so on - but the Charge 4 also introduced active zone minutes, which is designed to focus on boosting heart health through your activities, regardless of steps. It's better positioned to reward varied activities rather than depending on steps as a metric.

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Fitbit Versa 3

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The Fitbit Versa 3 succeeds the Versa 2 - below - but it adds some of the main features missing from the 2019 device.

There's a built-in speaker for taking calls, along with built-in GPS and there's also Google Assistant on top of Amazon Alexa.

You'll also find fast charging on the Versa 3, along with all the other features you'd expect from a Fitbit smartwatch including all day activity tracking, sleep tracking and smartphone notifications. There's also Fitbit Pay as standard and Pure Pulse 2.0 heart rate technology like the Sense (below).

The Fitbit Versa 3 comes in three colours: Pink Clay and Soft Gold Aluminium, Black and Black Aluminium, Midnight and Soft Gold Aluminium.

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Fitbit Versa 2

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The Fitbit Versa 2 is the first step from fitness tracker to smartwatch in Fitbit's current portfolio. It offers a metal body waterproofed to 50m with rounded corners and a domed back, and it comes with interchangeable straps.

It offers many of the same features as the Charge 4, including waterproofing, heart rate tracking, sleep stages, swim tracking, elevation data, and NFC for Fitbit Pay but it only offers Connected GPS. 

The Versa 2 does have the ability to install some third party apps though, and it has built-in Alexa, music storage, an Always On display mode and Sleep Mode.

The Fitbit Versa 2 comes in five colours. There are also two Special Edition models that come with both a woven strap and classic strap. 

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Fitbit Sense

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The Fitbit Sense is the company's most accomplished smartwatch, taking on a similar design to the Versa family but offering more features.

It has all the features from the Versa 3, along with a EDA sensor for stress monitoring, the ability to take an ECG and a skin temperature sensor.

Along with these additional sensors, the Sense smartwatch has built-in GPS, both Google Assistant and Amazon Alexa voice assistants and it still promises a six day battery life.

There's also a built-in speaker, allowing for Bluetooth calls and responses from the voice assistants and there's the Pure Pulse 2.0 heart rate technology too, which can detect high and low heart rate and notify you when you go above or below your normal thresholds. 

The Fitbit Sense comes in two colours of Carbon and Graphite Stainless Steel or Lunar White and Gold Stainless Steel.

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Fitbit Ionic

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The Fitbit Ionic is more sportswatch looking in design and offers all the features available on both the Versa 2 (except Alexa), while adding a few of extras like built-in GPS. It misses out on some of the features offered by the latest Sense smartwatch though.

It comes with partner apps like Strava and it offers on-screen workouts like the Versa and Sense devices. The Ionic also has interchangeable straps and a unibody made from aerospace aluminium for a premium look.

The Fitbit Ionic is said to have a 4-day battery life and it offers extended smartphone notifications to include apps like Facebook, WhatsApp and Gmail, like the Versa family, Inspire family and Charge 3 and 4 also do.

The Ionic is available in three colours, each of which are compatible with the two leather straps and three sports bands available separately.

The Gear Loop buyers

If you love tracking stats and crunching the numbers on your latest outdoor activity, you'll love The Gear Loop. Our new sister site is here to bring you the freshest news, the most honest reviews, informative guides and inspirational travel features that cover all outdoor active lifestyle pursuits, from sea to summit. Whether that’s running or cycling, winter sports or water sports, The Gear Loop has got it covered.

Writing by Britta O'Boyle. Originally published on 9 February 2016.