Best Fitbit 2021 for health and fitness tracking reviewed and ranked

The best Fitbits count steps, track sleep and estimate calories: get the best Fitbit for you using our comprehensive guide

Included in this guide:

The Best Fitbits include fitness bands, smartwatches and everything in-between
(Image credit: Fitbit)

Many people associate the best Fitbits with the best fitness trackers, mainly because the California-based fitness company is the largest player in that market by a huge margin. By getting a Fitbit, you know you'll get a decent fitness wearable for a good price.

You can get cheaper trackers, but Fitbit has a well-deserved reputation for the quality of what it sells in terms of build and app support. Below is the list of all the best Fitbit watches, bands and trackers, reviewed and ranked by T3's resident Fitbit experts.

Back in the day, Fitbit started with basic pedometers that clipped onto sports bra straps or waistbands; it's now moved up through a variety of bands to produce sophisticated devices that track everything from runs via GPS to workouts via heart-rate monitors to even menstruation – via user diary entries rather than any sensor, admittedly.

Having said that, most Fitbits aren’t just for step counting these days. They can be useful when running, at the gym or in your home gym, but you need to know which one to buy to suit your needs. Get fit for 2021 using the best Fitbits.

Looking for a device to track sleep? Some Fitbits can help you with that, but there are also dedicated sleep trackers available, not to mention the best running watches that can also analyse sleep quality, among other things.

Lastly, although we tried to explain as clearly as possible which Fitbit below is good for what purpose, we also have a dedicated guide on how to choose the right Fitbit for you. The same goes for price: all entries have dedicated, automatically-updated price widgets, but in case you would like to see even more deals have a look at our cheap Fitbit deals roundup.

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Want to buy a new Fitbit? We're certain you'll find plenty of Fitbit deals on Black Friday, admittedly the biggest shopping event of the year. If there will be decent Fitbit deals, you'll find them in our Black Friday hub. Just click on the link above and you will be instantly taken to T3's Black Friday Hub where you'll find them all. 

Best Fitbits, in order of preference

The Fitbit Versa 3 is T3's choice for best fitness trackerT3 Best Buy Award badge


(Image credit: Fitbit)

The best Fitbit overall

Specifications
Quoted battery life: 5+ days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: Yes
Waterproof: Yes
Touchscreen: Yes
Ambient light sensor: Yes
Water resistance: up to 50 metres
NFC payments: Yes
Bluetooth: Yes
Smartphone notifications: Yes
Female health tracking: Yes
Reasons to buy
+Improved GPS and heart rate tracking+Attractive design+Long battery life
Reasons to avoid
-Lacks features from Fitbit Sense – but we don't think that matters

Fitbit Versa has long been the best smartwatch-styled Fitbit, but Versa 3 adds some long-demanded features and makes everything from the Versa lineage a bit slicker. 

Most importantly, there is improved heart-rate tracking accuracy during intense exercise, built in GPS – which is also pretty accurate, though it is not the fastest to connect – and the option of an always-on screen. For those of us who found Fitbit's old 'flick your wrist to activate screen' approach infuriating, that last one is great news.

With those additions, plus support for active zone minutes, which rewards you for more intense workouts, this is a much better Fitbit for those who are a bit more serious about their fitness goals. 

However, Versa 3 is also great for those who want a stylish and slick smartwatch for notifications and contactless payments, but don't want to pay for an Apple Watch – or don't use iPhones.

Also consider: Fitbit Sense is even nicer than the Versa 3 and adds some interesting features such as stress tracking and an ECG. However for most people we suspect these extra features really will be 'interesting' rather than particularly useful, and they do also mean the Sense is £100 or $100 more expensive than the Versa 3.

The Fitbit Charge 4 is the best Fitbit fitness bandT3 Approved badge

(Image credit: Fitbit)

2. Fitbit Charge 4

The best Fitbit fitness band – now with built-in GPS!

Specifications
Quoted battery life: 5+ days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: Yes
Waterproof: Yes
Touchscreen: Yes
Ambient light sensor: Yes
Water resistance: up to 50 metres
NFC payments: Yes (Versa and special Edition only)
Bluetooth: Yes
Smartphone notifications: Yes
Female health tracking: Yes
Reasons to buy
+Solid cardio tracking+Phone notifications+GPS built in+Strong battery life
Reasons to avoid
-Not terribly chic-No always-on screen

Hot off the production lines, the waterproof and compact Fitbit Charge 4 is the newest Fitbit and its best ever fitness band. I prefer the more smartwatch-style Versa 2,  but if you're after a band, they don't come better than this. 

The inclusion of GPS and 'Activity Minutes' – a tracking system for more intense exercise than just taking steps – brings it in line with Garmin's bands. However Fitibit's app is noticeably better than the Garmin one and the Charge 4 is also more affordable than many of its arch rival's bands.

Notifications are better handled than on the Charge 3 and it feels a bit slicker all round, in fact. However, the fact that you cannot set the screen to always on, even during a workout, remains a PITA. Sort it out, Fitbit!

To see how this Fitbit compare to our number one choice, then check out T3's Fitbit Versa 3 vs. Fitbit Charge 4 comparison feature.

The Fitbit Versa 2 is the best cheap Fitbit smartwatchT3 Approved badge


(Image credit: Fitbit)

3. Fitbit Versa 2

Particularly if you don't need GPS, this 'oldie' is still worth considering

Specifications
Quoted battery life: 5+ days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: Via connected phone
Waterproof: Yes
Touchscreen: Yes
Ambient light sensor: Yes
Water resistance: up to 50 metres
NFC payments: Yes (Versa and special Edition only)
Bluetooth: Yes
Smartphone notifications: Yes
Female health tracking: Yes
Reasons to buy
+A wearable you'll want to wear+The full range of Fitbit features
Reasons to avoid
-GPS is via your smartphone only

If we were to describe one Fitbit as the best Fitbit, we'd pick the Versa 3. But that leaves a discounted Fitbit Versa 2 as arguably the best value Fitbit, so long as it's at the right price.

Other than lacking the Versa 3 and Charge 4's built-in GPS – although you can link it to your phone and use the GPS therein, which should be more than adequate for most users – Versa 2 has the full gamut of Fitbit features. There's heart-rate tracking, the option to access an overall fitness score, basic step and distance tracking, access to Fitbit's motivational social network, an app store and the ability to play music direct from the watch via Spotify. 

Versa 2 has a mute version of Amazon Alexa, which obeys your commands in the usual way, but replies to queries via text only. It’s an improvement, frankly. It's also waterproof and features tracking of your swims too, which is good news for swimmers. 

Those wanting workout motivation might like the on-wrist video workouts of the Versa 2. You do quickly find that trying to watch a virtual personal trainer who sits on your wrist is not the easiest way to learn new exercises, mind you.

You also get basic smartphone features – a smattering of apps, notifications and contactless card payments – but with much better battery life than most smartphones. Even if you make full use of the fitness tracking features and heart-rate monitor, you will get 5 days life out of the Versa quite comfortably, which is a lot more than Apple Watch, for instance.

On the downside, the Fitbit Pay system is barely supported in the UK. But you're in luck if you're with Santander and Revolut, which we have at least heard of, Danske Bank, Starling Bank or 'boon. by Wirecard' whatever the hell that is. Otherwise, we would not recommend cutting up your card just yet.

That aside, Versa 2 is an excellent product. Perhaps most importantly, it looks good. That's more than can be said for the Ionic, Blaze and Surge, which were Fitbit's previous stabs at smartwatch-type wearables. Fitbit has also honed and refined the Versa since its launch, adding features such as blood oxygen tracking during sleep.

Also consider: As well as the standard Fitbit Versa 2 there’s also a Versa 2 Special Edition. It’s functionally identical but looks nicer, with a more pleasing strap.

To see how this smartwatch compares to our number one choice, be sure to check out T3's Fitbit Versa 2 vs Fitbit Versa 3 comparison feature.

The Fitbit Inspire 2 is the best cheap Fitbit fitness tracker that looks rather handsome tooT3 Approved badge

(Image credit: Fitbit)

Best cheap Fitbit fitness tracker

Specifications
Quoted battery life: up to 10 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: Via connected phone
Waterproof: Yes
Touchscreen: Yes
Water resistance: Yes, up to 50 metres
Smartphone notifications: Yes
Reasons to buy
+Slim design+1-year Fitbit Premium subscription included in the price+Long battery life
Reasons to avoid
-Only connected GPS

Aimed at more casual users, the Inspire 2 makes it easier to log and monitor activities, even if you are not tracking them as workouts, thanks to the Active Zone Minutes feature. The Fitbit Inspire 2 fitness tracker can help build healthier habits with features like goal-based exercise modes (over 20 of these included on the device), advanced sleep tools, 24/7 heart rate tracking, menstrual health tracking, food and hydration intake monitoring, along with your weight, plus daily encouragement right on your wrist.

All that said,, probably the best thing about the Fitbit Inspire 2 is that it comes with a one-year free trial of Fitbit Premium, included in the price. So, not only the Fitbit Inspire 2 is way cheaper than the Charge 4, it also includes a service that would otherwise cost you as much as the tracker itself. Did we mention the Inspire 2 also has an up to 10 days battery life, the longest Fitbit has to offer?

To see how this model stacks up against a more expensive Fitbit, then check out T3's Fitbit Charge 4 vs Fitbit Inspire 2 comparison feature.

The Fitbit Charge 3 has nearly all the features of the OG Versa but in a fitness band formT3 Approved badge

Nearly all the features of the Versa, in a more traditional fitness band form

Specifications
Quoted battery life: up to 7 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: Via connected phone
Waterproof: Yes
Touchscreen: Yes
Ambient light sensor: Yes
Water resistance: up to 50 metres
Smartphone notifications: Yes
Female health tracking: Yes
Reasons to buy
+Compact, well made and not unattractive
Reasons to avoid
-No built-in GPS-Dodgy, capacitive 'button'

Much the same as the Charge 4 but older, slower and lacking GPS and Activity Minutes – for some reason, Fitbit is not bringing that to its older bands – Charge 3 may be worth considering if you see it at a low price. Which you probably will. 

The Charge 3 is the perfect choice if you want heart-rate monitoring and access to Fitbit's app. GPS tracking of runs, bike rides etc is possible via your phone's GPS – the Charge 4 piggy-backs on your phone's navigational abilities and feeds the results into the Fitbit app.

You get notifications and – in the limited edition version only – Fitbit Pay, but there's less emphasis on smartphone features here, with notifications but not much in the way of apps. Which is fine by us, since even on its 'proper' smartwatches, the Fitbit app store is about as well stocked as a Soviet Union supermarket.

The Fitbit Ionic is the sportiest Fitbit smartwatch with built-in GPST3 Approved badge

The Fitbit for runners and riders

Specifications
Quoted battery life: up to 5 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: built-in
Waterproof: Yes
Touchscreen: Yes
Screen material: Gorilla Glass
Water resistance: up to 50 metres
NFC payments: Yes
Bluetooth: Yes
Smartphone notifications: Yes
Reasons to buy
+The most powerful Fitbit in terms of fitness features+Handy notifications
Reasons to avoid
-Half baked app selection-On-wrist video coaching not a great idea

The Ionic is, again, like the Versa, but with two major differences. First is that GPS is built in, so your phone is not required when running, cycling, hiking, etc. The other is that it looks fairly horrible. However on the plus side, it is a fair bit bigger than the Versa and so better suited to more manly/larger wrists.

Fitbit Ionic adds a lot of running watch functionality, far more successfully than the old Fitbit Blaze and Surge. Runs are auto-detected, and tracked via GPS, and there's also heart rate tracking that works relatively well during high intensity workouts.

If you want a running watch, we'd recommend a Garmin over it, and if you want a smartwatch with running/cycling/gym-friendliness, we'd suggest an Apple Watch Series 4. If, however, you are a runner, walker or cyclist, require something more watch-like in appearance and simply must have a Fitbit, then this is the one to go for. That seems like a fairly narrow niche to us, but it's still an excellent product in most ways, even if the looks are a bit of an acquired taste, to put it diplomatically.

The Fitbit Inspire HR is a slimline Fitbit fitness trackerT3 Approved badge

(Image credit: Fitbit)

7. Fitbit Inspire HR

Slimline Fitbit fitness tracker

Specifications
Quoted battery life: up to 5 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: via connected phone
Cardio Fitness Level: Yes
Waterproof: Yes
Touchscreen: Yes
Water resistance: up to 50 metres
NFC payments: No
Bluetooth: Yes
Smartphone notifications: Yes
Reasons to buy
+Very slim+Good battery life+Pulse tracking included
Reasons to avoid
-Struggles to keep pace during intense workouts

This recent addition to the Fitbit range is the replacement for the Alta HR. it's practically indistinguishable from the Charge 3 in terms of features – pulse tracking, 5-day battery, waterproof, it's able to tap your phone's GPS to track runs etc – but noticeably slimmer.

The good thing about this is… it's slimmer and a bit more discreet than the Charge 3. The down side is that it struggles a bit more than the Charge 3 to follow your heart beat when you are sweating and working out intensely. With more of a proper button, it feels a bit better than the Charge 3. We'd say it's aimed more at women but it is essentially unisex. Lots of replacement straps are available.

The Fitbit Ace 3 is the best Fitbit for kidsT3 Approved badge

(Image credit: Fitbit)

A Fitbit designed for the little ones

Specifications
Quoted battery life: up to 5 days
Heart-rate tracking: Yes
Sleep tracking: Yes
Waterproof: Yes
Touchscreen: Yes
Water resistance: up to 50 metres
NFC payments: No
Bluetooth: Yes
Reasons to buy
+Great battery life+Soft, super durable strap+Responsive touchscreen+Makes exercise and healthy habits fun
Reasons to avoid
-Not many games-Black and white screen

The Fitbit Ace 3 builds upon another great tracker – the Fitbit Ace 2 – by adding better battery life and some next extra features for more accurate tracking to become the best kids smartwatch. While it packs a punch feature-wise, the watch also looks great, and because there are no specific character or movie tie-ins, it offers longevity. It may even be acceptable to teenagers (maybe).

The Ace series of fitness trackers have always been great to motivate kids with funny animations/competitions and thankfully, Ace 3 does this pretty well too: for example, a little disco ball drops down on the screen to celebrate 10,000 steps walked in a day, to the delight of most sub-10-yo children.

Should you set up a family account in the Fitbit App, you can keep tabs on your child's activity while the kids can delight themselves in collecting virtual badges on their profile. Fun for the whole family indeed.

The Fitbit Alta HR might be a good option if you're fond old technologyT3 Approved badge

9. Fitbit Alta HR

Old version of the Inspire HR

Specifications
Quoted battery life: up to 7 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: via connected phone
Auto exercise recognition: Yes
Touchscreen: Yes
Bluetooth: Yes
Smartphone notifications: Yes
Reasons to buy
+Discreet design+Week-long battery life
Reasons to avoid
-Tap-sensitive screen isn't sensitive enough

The Fitbit Alta HR is essentially a slimmed-down Fitbit Charge 2 (see below) and predecessor to the Fitbit Inspire HR. It's probably aimed more at the ladies, and while heart rate monitoring is built in, there's no way we'd use it to track pulse activity during intense exercise. 

Call, text, and calendar notifications are here, but there's no waterproofing, and no access at all to GPS, even via your phone. All the other usual key Fitbit selling points are in place however, with access to the app and social stuff, simple operation and week-long battery life. 

There's no way we'd get this over the Inspire HR unless it's at an ultra-low price.

The Fitbit Inspire lacks heart rate sensor and it hasn't got GPS eitherT3 Approved badge

(Image credit: Fitbit)

10. Fitbit Inspire

Basic step counter with few bells or whistles

Specifications
Quoted battery life: up to 5 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: via connected phone
Waterproof: Yes
Touchscreen: Yes
Water resistance: up to 50 metres
NFC payments: No
Bluetooth: Yes
Smartphone notifications: Yes
Reasons to buy
+Waterproof+Affordable+Good battery life
Reasons to avoid
-Doesn't do a lot

This is the same as the Inspire HR  but without the 'HR' (heart-rate tracking) bit. You also can't access your phone's GPS with this one. So what you're left with is your classic step counter band, like your mum wears. If you are quite sedentary and want to get moving, this might be worth considering although it's also worth considering that someone like Xiaomi will do you a similar, if less stylish band for a lot less…

The Fitbit Alta HR at least tracks heart rateT3 Approved badge

(Image credit: Fitbit)

For those who like a classic Fitbit for a lot of money

Specifications
Quoted battery life: up to 5 days
Heart-rate tracking: Yes
Sleep tracking: Yes
GPS: via connected phone
Waterproof: Yes
Touchscreen: Yes
Water resistance: up to 50 metres
Bluetooth: Yes
Smartphone notifications: Yes
Reasons to buy
+Striking design+Week-long battery life
Reasons to avoid
-Tap-sensitive screen isn't sensitive enough-Not a tremendous value

The Fitbit Alta is one of the more attractive fitness trackers that Fitbit makes, and certainly the most discrete, so long as you don't buy the gold one. It is also rather basic but if all you want is step counting and sleep tracking, hooked into Fitbit's market-leading app and community, then it's all you need – but we'd recommend the newer, waterproof Inspire over this.

person looking to the side in front of a bookshelf holding a mug wearing a Fitbit Luxe fitness tracker


(Image credit: Fitbit)

Which is the best Fitbit to buy?

Our top recommendation for most users is the Fitbit Versa 3. Those requiring a band rather than a watch should head straight to Fitbit Charge 4. These are the best Fitbits for more serious exercise, since they have GPS built in, better heart-rate tracking, and a focus on 'active minutes' instead of steps taken.

Despite doubts over the accuracy of its step counting and calorie calculations, what keeps Fitbit popular is its well established social network and slick app, as well as an ongoing stream of new devices that offer the Fitbit experience in a variety of shapes, sizes and prices. 100% accuracy is not the most essential thing in a fitness tracker.

The real keys to success are wearability, a good, motivational app, a wide range of features and, if the stats aren't necessarily bang-on accurate, they are at least consistent in the way that they are inaccurate. In that case, you can tell if you are improving, maintaining or – heaven forbid – deteriorating in terms of activity and fitness. The Fitbits Versa 3 delivers all that in spades.

What is the most advanced Fitbit?

The 'most advanced Fitbit' title goes to the Sense, Fitbit's flagship model at the moment. It has all the features of the excellent Fitbit Versa 3 but also adds stress tracking, a skin temperature sensor and an ECG app to the mix. Most of these features have received the FDA and CE stamp of approval (US and EU, respectively) to be used by people who haven't got any cardiovascular medical history.

That said, the Sense is not a medical device and Fitbit never claimed it was.

For most people we suspect these extra features really will be 'interesting' rather than particularly useful, and they do also make the Sense is $/£100 more expensive than the Versa 3.

Which Fitbit is best value for money?

We would argue that the best value Fitbit for money at the moment is the Fitbit Inspire 2, especially if you're new to Fitbit. This straightforward fitness band tracks heart rate 24/7, features Fitbit's Active Zone Minutes system and adds a free 1-year Fitbit Premium trial for new Premium users, through which you can get personalised guidance, access 'exclusive' insights and sleep tools in the Fitbit App.