Best Fitbit 2021: compare Fitbit smartwatches and trackers

Discover the Fitbit that suits your style, budget and fitness levels
Best Fitbit 2021
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There's such a selection of Fitbit smartwatches and fitness bands, choosing the right device feels mindboggling. That's why we've set up this feature, to try and compare Fitbit models.

New Fitbit devices like the Fitbit Sense have reached another level of features and health tracking, so now it's a choice about how much data you want to collect.

Fitbit devices range between simple steps and sleep tracking at one end (Fitbit Inspire), to full tracking of your heart vitals, sleep stages and even body temperature stress levels at the other (Fitbit Sense). And now the Fitbit Luxe puts those top features in a sleeker package.

You'll also need to weigh up whether you want a fitness tracker or smartwatch form factor.

There's no wrong or right answer here.

Read on for our guidance based on years of reviews and testing.

Fitbit watches vs bands

But if you already have a watch that you love to wear, you might want to choose a Fitbit band so you're not wearing two wrist watches.

Some people also just don't get on well with watches, and prefer something slimmer. And the Fitbit Inspire can be clipped on, so there's no need to wear something on the wrist at all.

Then there's features. A lot people think about a Fitbit in terms of 10,000 steps a day - but now they're all about heart rate tracking and analysis, resting heart rate and sleep monitoring too. But if you're an active person, or really hungry for in-depth data – you'll be looking at specific trackers in the range. Read on for our comparison and reviews.

Update: We updated this article in July 2021 with our full Fitbit Luxe testing.

Fitbit comparison: find your perfect features

Device Price GPS HR ECG Swim SpO2
Fitbit Sense$329.99 Yes Yes Yes Yes Yes
Fitbit Charge 4$149.99 Yes Yes No Yes Yes
Fitbit Luxe$149.99 No Yes No Yes Yes
Fitbit Versa 3$229.99 Yes Yes No Yes Yes
Fitbit Inspire 2$99.95 No Yes No Yes No
Fitbit Inspire$69.95 No No No Yes No
Fitbit Versa Lite$159.99 No Yes No Yes Yes
Fitbit Ace 3$69.95 No Yes No Yes No

Fitbit Sense

Fitbit Sense - the best fitbit

The best health watch


Fitbit Sense features: Heart rate | ECG | Stress tracking | Temperature | VO2 Max | GPS | SpO2 sensor | Steps | Sleep tracking | Guided Breathing | Workout modes | Women's health tracking


If you're choosing a Fitbit, but looking for a little more detail than just your daily step count, the Fitbit Sense is the device for you.

It's a fully fledged health watch, with every bell and whistle you can imagine. In fact, it's provides more data about your wellbeing than any rival on the market.

Stress tracking, mindfulness via an electrodermal activity sensor, ECG, temperature monitoring all join blood oxygen, 24/7 heart rate, top sleep tracking and, of course, your step count.

There's also GPS, loads of workout modes, and it will kick your data out to platforms like Strava if you hook them up.

Fitbit has put an added focus on its Fitbit Premium, so subscribers to the $79.99 a year service will get even more data.

Premium reveals a whole dashboard of new raw data called Health Metrics across all devices – but Sense leverages the most. You get temperature and resting heart rate, breathing rate, oxygen saturation, and heart rate variability all shown in one screen.

If there's a downside it's that there are a lot of graphs, but not a lot of information about what's happening under the hood, so we'd advise getting yourself clued up on the key metrics.

At the moment Fitbit Sense has some annoyances - and the on-watch experience is a little laggy, and the wrist-raise is too slow. Hopefully these get fixed up, because you do get around six days of battery life, a seriously rapid fast charge. And Fitbit Pay is on board if your bank supports it.

Read our full review of the Fitbit Sense.

Price when reviewed: $329.95


Fitbit Charge 4

Fitbit Charge 4 on wrist from our review

The best fitness tracker


Fitbit Charge 4 features: Heart rate | VO2 Max | GPS | SmartTrack | SpO2 sensor | Steps | Sleep tracking | Guided Breathing | Workout modes | Stress tracking | Skin temperature | Women's health tracking


If you're looking for a Fitbit then there's a new sheriff in town. The Fitbit Charge 4 isn't just the most powerful Fitbit tracker we've seen to date, but one of the most powerful fitness trackers full stop.

Most of the race for health innovation is now played on on smartwatches, so the full gamut of features in wrist-band form is now pretty unique. GPS is the big new addition, offering accurate tracking of runs and cycles from the wrist, and the Charge 4 also has an SpO2 sensor for blood oxygen, will monitor VO2 Max, resting heart rate, and boasts Fitbit's brilliant sleep tracking smarts as well.

It's swim-proof with 5ATM water resistance, and will track and tag data from 20 sports, from HIIT and yoga to general workouts (although just basic calorie, HR and duration data).

The Fitbit Charge 4 certainly sets out its stall as a great device for those who like to workout, do HIIT, living room workouts, gym classes and the odd run. If you're a 10,000 steps a day person it's overkill, and committed runners will crave more detail on progression. But it's a fine update to the Charge 3, although we do wish Fitbit has worked on the screen, which looks pretty dated these days.

With the inclusion of the SpO2 sensor, the Charge 4 is also one of the best Fitbit devices for sleep tracking. It has Sleep Stages, Sleep Insights, Sleep Score and Estimated Oxygen Variability - all metrics that far outweigh the rest of the competition.

The Charge 4 isn't just one of the best Fitbit trackers you can buy, it's one of the best wearables you can buy.

Wareable verdict: Fitbit Charge 4 review

Price when reviewed: $149.95


Fitbit Luxe

Fitbit Luxe

Best Fitbit for women


Fitbit Luxe features: Heart rate | VO2 Max | SpO2 sensor | Step tracking | Sleep tracking | Guided Breathing | Workout modes | Skin temperature | Women's health tracking


There's a new Fitbit in town and it's bringing some much-needed style to the party. The Fitbit Luxe introduces a stainless steel case and a color AMOLED display, both of which is a huge visual step up from the Charge and Inspire.

It's actually something you might want to wear. And while the look and feel is Luxe, the price tag is not. It retails for $149.99 – which is the same as a standard Charge 4.It comes in white, black and orchid (pink) options and there's a special edition with gold link bracelet. It's not exclusively for women, but quite obviously marketed that way.

In terms of features there's nothing exclusive to Luxe, but plenty of top features filter down the Fitbit range. It's not as advanced as the Charge 4 (there's no GPS, for example) but trumps the Inspire range with its SpO2 sensor for blood oxygen.

There's also a new drive towards mindfulness, and it will keep tabs on stress using a daily stress score. That feature is actually rolling out across Fitbit devices. That's on top of sleep, heart rate and steps – everything you expect from Fitbit.

In short, the Luxe puts the best parts of the Fitbit experience in a nicer, sleeker and more stylish package. What's not to like about that?

Read our full Fitbit Luxe review.

Fitbit Versa 3

Fitbit Versa 3 - from our review

The best Fitbit smartwatch


Fitbit Versa 3 features: PurePulse 2.0 HR sensor | GPS | SpO2 sensor | Swim tracking | Sleep tracking | Fitbit Pay | Notifications | App Gallery | Alexa | Music storage | Women's health tracking


While the Fitbit Sense has stolen the show as the company's flagship smartwatch, the Versa 3 is here for those that don't want to pay big money for features like ECG and stress.

The Versa 3 is a solid update to the previous version, adding GPS for outside tracking of workouts.

It also gets the upgraded PurePulse 2.0 HR sensor, which should be more reliable but still struggles at very high intensity.

As a smartwatch and fitness tracker, the basics are the still same – with heart rate, steps, sleep tracking all done within the Fitbit app. The SpO2 sensor is now live, too, adding insights into Estimated Oxygen Variability, as well as Sleep Score, Sleep Stages and Sleep Insights.

And Fitbit Premium users will get breathing rate, heart rate variability, oxygen saturation and resting heart rate in the new Health Metrics dashboard.

You still get Alexa is chief among these, where a button press will summon Amazon’s voice assistant for alarm setting, timers, and quick check-ins on your goal progress – if you like that sort of thing.

Check out our full review of the excellent Fitbit Versa 3.

Price when reviewed: $229.95

Fitbit Inspire 2

Fitbit Inspire 2

The best basic Fitbit fitness tracker


Fitbit Inspire series features: Step tracking | Waterproof | Swim tracking | Heart rate (Inspire HR) | Sleep tracking (Inspire HR) | Screen and notifications | SmartTrack | Interchangeable bands


The launch of the Fitbit Inspire 2 is a minor update to the Inspire HR, but a better screen and the new Active Zone Minutes feature make it a no-brainer at the same price.

The slimline, dainty activity bands are perfect for smaller wrists, yet they still manage to boast a relatively big touchscreen display. What's more, they're also waterproof, offering some basic swim tracking – making it more versatile that its predecessor, too.

It covers the usual fitness tracking bases, with the Inspire HR unlocking features like Sleep Stages, guided breathing and training with heart rate zones. You also get the goal-based exercise modes from the Charge 4 and SmartTrack tech to automatically recognise when you're working out.

There's notification support here, but that's as far as the smartwatch features go. There's no third-party app support, either, but you do get a decent handful of watch faces to choose from.

It's a feature-packed fitness tracker that, crucially, doesn't come at a great expense. This is now Fitbit's cheapest tracker range, whether you go for the Fitbit Inspire or the Inspire HR.

Combined with Fitbit's great companion app that also unlocks additional features, like women's health tracking, you're getting a great overall fitness tracker that won't break the bank.

Check out our comprehensive Fitbit Inspire 2 review.

Price when reviewed: $99.95

Also see: Fitbit Inspire HR review | Fitbit Inspire review

Fitbit Ace 3

Fitbit Ace 3

The best Fitbit for kids


Fitbit Ace 3 features: Step counting | Swim-proof design | Sleep tracking | Activity | Challenges


The Fitbit Ace 3 is aimed at kids aged six and up, with the latest generation featuring a modular design that utilizes a bumper to keep the display a little more protected as kids run around and play.

The Ace 3 puts move reminders at its core, reminding kids to get those 250 steps per minute on their way to 60 minutes of active time per day.

It's still a monochrome display, so no color options here. And the main features are still step tracking, sport monitoring and sleep insights. There’s no heart rate monitor, but it does boast swim-proof 5ATM water resistance.

There are also bedtime reminders and silent alarms to help parents get a settled sleep schedule and there are also timers and race the stopwatch features built into the watch.

Thee larger tracker also means a boost in battery life and it will now last 8 days between charging, up from 6 days on the previous generation.

Price when reviewed: $79.95



This article was first published in December 2015. However, we update it frequently to reflect the newest Fitbit devices, making sure that we've tested the latest and greatest devices available to buy.