Best Fitbits 2024: choose the right Fitbit fitness tracker for you

Fitbit is one of the most popular fitness tracker brands around, offering a range of options, from the hi-tech Charge range to Ace – a series designed with kids in mind.

The best Fitbits accurately log your steps, while being easy to use and comfy to wear. 

However, our testing has found that some Fitbit fitness trackers, aka activity trackers, fall down on accuracy, with some telling you you've burned twice as many calories as you actually have and overstating step count by more than 30%.

We explain how to choose the right Fitbit for you, exploring the ranges and features available, and how to pick the best.

To see which fitness trackers from other brands have scored top marks in our lab, see our guide to the best fitness trackers

At a glance: the Fitbit range

Fitbit sells a selection of fitness trackers split into several core ranges: Ace, Inspire, Luxe and Charge. 

Ace is primarily designed for kids, Inspire is the entry-level adult range, with Charge offering more advanced features, and Luxe focusing more on designer looks and stylish features.

The line-up has grown over the years, with new versions of these ranges coming out regularly. Prices currently start at around £50.

The latest release in the Charge range is the Fitbit Charge 6 (£139), which has built-in GPS for distance and location tracking, along with a waterproof design and gym equipment integration.

We've also been hands-on with the Fitbit Luxe in our test lab. It comes in a couple of different colours and has a colour AMOLED display, making it a little more advanced than some previous monochrome Fitbits. Plus, the display automatically adjusts its brightness based on your environment.

Fitbit features

Key features to look for when choosing between Fitbits include:

• Fitbits with built-in GPS – if you opt for a Fitbit that has this, you can leave your smartphone behind when you run and your wearable can still track your route. Models with built-in GPS include the Fitbit Charge 6, 5 and 4.
• Fitbits with heartrate monitoring – most Fitbit models now have this functionality and you can track your heart rate continuously or measure it when you want. The Fitbit Luxe, Charge 6 and Inspire 3 all have a built-in heart-rate monitor.
• Fitbits with sleep tracking – some models will automatically track your sleep, which the brand says will help you get better rest and improve your well-being. From the smartphone app, you can see your Sleep Score, which shows how well you slept.

Other notable Fitbit features include the ability to set alarms and track floors climbed if your tracker has an altimeter sensor. 

Some models also support Fitbit Pay or Google Pay, which lets you pay for things by tapping the tracker against a wireless payment terminal.

You may find older versions of models on sale for less, but check they have the features you want, otherwise you might be left frustrated by the lack of functionality vs newer models.

How much does a Fitbit cost?

At the time of writing, you can expect to spend at least £50 on a new Fitbit. But it's worth noting that Fitbits regularly go on sale, particularly around Black Friday and Amazon Prime Day.

Prices on Fitbit's own website are as follows, though it's worth shopping around as we've seen them cheaper elsewhere (our reviews will also compare retailer prices for you):

• Fitbit Inspire 2 (£49.99)
• Fitbit Inspire 3 (£69)
• Fitbit Luxe (£99)
• Fitbit Charge 5 (£129.99)
• Fitbit Charge 6 (£139)

For the lowdown on the pros and cons of each model, including comfort, accuracy and how long the battery lasts, see our Fitbit fitness tracker reviews.

Best Fitbit fitness trackers

We've rounded up the best Fitbits from our tests below. 

Only logged-in Which? members can view our recommendations in the table below. If you’re not a member, you can get instant access to these and thousands of other independent reviews by joining Which? today.

Fitbit also make a number of smartwatches. Head to our Fitbit smartwatch reviews to see all those we've tested. 

The Fitbit app

By downloading the Fitbit app and pairing it with your tracker, you'll get at-a-glance information on your health and fitness. The app is used to log exercise sessions, plus monitor weight, sleep and nutrition. Fitbit trackers use Bluetooth to sync data with your phones or tablet.

Once your tracker is paired, you can see how many steps you've taken through the day and how many miles that equates to. You might want to set yourself a daily movement target or 'calories burned' target, and the smartphone app makes this easier to track while you're on the move.

Do Fitbits work with iPhones?

Yes, the Fitbit app works with both iOS and Android devices.

• Download Fitbit for iOS
• Download Fitbit for Android

What is Fitbit Premium and how does it work?

The standard Fitbit app is free to download and use, but a paid-for alternative is available that unlocks extra features.

With Fitbit Premium (£7.99 per month or £79.99 per year), you get access to the following extra features:

• Daily Readiness Score – tells you if you’re ready to work out or need a rest day.
• Stress Management Score Breakdown – the brand says this will help you 'strengthen your resilience.'
• Wellness report – this lets you download a PDF summary of your activity.
• Advanced skin temperature details (On certain models Fitbit Senseonly) – see your sleeping skin temperature variation with a minute-by-minute view.
• Workouts – access video and audio workouts from Fitbit.
• Mindfulness – guided audio tracks to help you relax your mind.
• Sleep score breakdown – learn how to improve the quality of your sleep.
• Blood glucose trends – analytics that show your glucose trends over the past 30 days (based on you logging this info).

You can trial Fitbit Premium free for 90 days. If you don't cancel the subscription, you'll be charged £7.99 through auto-renew.

Fitbits for kids

The Fitbit Ace line-up is designed with younger users in mind. 

For example, we've been hands-on with the Fitbit Ace 2, which is aimed at kids aged six years and over. 

It has a chunkier design that should withstand getting bumped during play, although we haven't tested this in our lab. The bands come in a range of vibrant colours, including blue, yellow, pink, green and purple, and you can get patterned ones too.

See our first look review of the Fitbit Ace 2 to see what our first impressions were.

Are Fitbits waterproof?

Most Fitbit devices are water-resistant to 50 meters, but check instructions for your individual model before you take a dip.

Of the models we've tested, the Fitbit Inspire 2 and Fitbit Charge 4 and later offer some level of protection against water. The Charge 4, 5 and 6 has a tracking mode dedicated to swimming.

If you need a fitness tracker that will survive a splash of water, see our reviews of waterproof Fitbits.

Where to buy a Fitbit

Alongside the brand's own website, there are plenty of other places to buy yourself a Fitbit. Whether you're shopping online or in-store, make sure you pay attention to the shop's returns policy.

Popular online retailers that stock Fitbits include:

• Amazon stocks all of the key models and regularly offers discounts. It names the Fitbit Charge 5 as one of its best-selling Fitbits.
• Argos sells a selection of Fitbits and accompanying accessories, plus bands in various colours that you can use to personalise your tracker.
• Currys has Fitbit fitness trackers and smartwatches on its website, with prices starting at around £45 for the Fitbit Inspire 2.
• Very offers a range of Fitbit devices, including the Fitbit Ace 3 for children.

Find out which retailers are rated highly by Which? members with our expert guide to the best and worst shops.

Fitbit alternatives

Fitbit may be the name you've heard of, but it's not your only option. We've tested plenty of accurate and comfortable devices from other big-name brands, including Garmin, Huawei and Samsung.

For the best fitness trackers we've tested, and advice on how to choose the right one for you (and your budget) see our guide: Best fitness trackers.

How we test Fitbits and activity trackers

We put each fitness watch or activity tracker through a series of tough tests to find the best. 

We check the accuracy of step, distance and heart-rate tracking in different scenarios. This ranges from a routine of daily tasks, such as loading or unloading the dishwasher and carrying the shopping, to more strenuous activities. We can tell you the fitness trackers that accurately measure your steps and those that don’t.

And we don’t stop there. We know a tracker will be useless if it’s so uncomfortable you’re reluctant to wear it, so we assess how comfortable each one is during exercise and for daily life, as well as how long they last on a single charge.

Head to our Fitbit fitness tracker reviews for our verdict on all the latest models to undergo our tests.

To find out how reliable Fitbit trackers are compared with those from other brands, see our guide to the most reliable fitness tracker brands.