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Fitbit Blaze

Fitbit Blaze review: Fitbit’s first smartwatch is still worth a look in 2019

Our Rating :
Price when reviewed : £160
inc VAT (as of 26th of May)

Discontinued, but still worth picking up?

Fitbit doesn’t make the Blaze any more. Fitbit’s first attempt at a smartwatch wasn’t a bad effort, but has since been superseded by models that more assuredly make the jump from fitness tracker to smartwatch.

First up, there’s the Fitbit Ionic. This goes for £300, but has everything you could want from a fitness tracker, and crucially that includes GPS tracking, making it the only Fitbit you can use to track runs accurately without a phone. Moving down the scale, the Fitbit Versa and Versa Lite are both better-looking watches that stand out less in the office, but they piggyback off your phone’s GPS, giving you one more thing to carry when you head out the door for a run. 

As for the Fitbit Blaze itself, it’s still worth considering if you can find one on the cheap. It’s not as nice looking as the Versa family, but you can customise it by buying a strap that’s more to your taste, and it still tracks steps, runs and receives notifications perfectly well. Most importantly of all, you still have access to the brilliant Fitbit app and the sense of friendly competition that brings with it.

Riyad’s original review continues below.

Fitbit is the market leader when it comes to fitness trackers, with a wide range of devices to suit pretty much every need. The Blaze, however, is a little harder to pin down. At first glance, it looks more smartwatch than fitness tracker, but its feature-set is pretty limited. It’s also not really a sports watch, as it doesn’t have built-in GPS. 

Instead, Fitbit seems to have prized form over functionality with the Blaze, which is more or less the exact opposite of what it’s done previously. However, considering that appearance is very much at the forefront of the Blaze, Fitbit’s made sure that it’s highly customisable, allowing each individual user to get the look they want.

You won’t escape the metal frame, but there’s a multitude of different strap colours and materials to choose from, making it one of Fitbit’s more personalised fitness trackers in a while. Place the Blaze in one of the leather straps, for example, and it feels like a much higher-quality watch – it’s still too light to feel like a real watch, but it’s still very comfortable to wear. The downside is that the leather band costs around £60, while the metal strap is around £90.

Fitbit Blaze design

The Blaze itself is a square, plastic affair with a bright OLED screen. The screen is a good one and it’s easy to read in most lighting conditions. The screen is off by default, but it will automatically turn itself on as you raise your wrist – this generally works very well, but on the rare occasions when the screen doesn’t activate, you can simply tap it to wake it up.
Fitbit Blaze front

The default display is the time of day, but swiping the screen sideways will reveal a host of other options – daily stats, exercise options, FitStar (more about this later), timer, alarms and settings. As well as touchscreen control, there are also three buttons – a home button and two multi-function buttons whose purpose can vary depending on what you’re doing at the time.

READ NEXT: We compare every Fitbit to find the right one for you

The Blaze is designed to pop out of it surrounding metal frame, which sits at the centre of the supplied rubber strap. It comes out backwards, so it can’t pop out while you’re wearing it, but does need to be removed from the strap for charging. It’s this modular design that opens the door to a plethora of fashion options.
Fitbit Blaze module

Fitbit Blaze features

The core feature set of the Blaze isn’t that different from the Fitbit Charge HR. The Blaze will track every step you take throughout the day as well as estimate the distance you’ve travelled and the calories you’ve burned. There’s an altimeter built in, too, so it will take account of every flight of stairs you climb – I’ve always liked this feature in a fitness tracker as it really does encourage you to take the stairs instead of the lift. At the rear of the device is an optical heart rate monitor, which will track your heart rate throughout the day, giving you an average resting heart rate as well as an active heart rate.

There has been a lot of discussion about the accuracy of wrist-based, optical heart rate monitors, and in a chest strap will always be more accurate. However, for what devices like the Blaze are designed to do, the HRM is more than adequate. In testing I found that the HRM in the Blaze was generally quite close to the readout from a chest strap, but you need to adjust how you wear it depending on the situation. For everyday usage, where you’re really just logging your average heart rate the Blaze can be worn relatively loosely. But if you’re being active – running, circuit training, etc. – then you’ll want to wear the device quite tight to your wrist.

Fitbit Blaze back

Bear in mind that this caveat is true for any wrist-based, optical HRM. The looser the fit, the more light can seep behind the device, and the harder the sensor will have to work to get an accurate reading. Unless you’re in the habit of running maximum heart rate intervals, an optical HRM should be fine, and if you are that kind of hardcore athlete, then the Blaze isn’t the device for you in the first place. Incidentally, I found that the standard rubber strap was far better at keeping the Blaze tight than the leather option, and if you’re going to be getting all sweaty, you’ll want to use the rubber strap anyway.

As already mentioned, the Blaze doesn’t have a built-in GPS receiver, but it can make use of the GPS built into your phone. This Connected GPS feature is pretty common among smartwatches, while serious fitness watches usually have a GPD receiver built in.

Fitbit says that the Blaze would have been far heavier and bulkier with a built-in GPS, and that the option of connected GPS still provides speed, distance, pace and mapping functionality when it’s needed. Of course, that does mean that you’ll need to carry your phone with you when exercising, which isn’t always convenient.

Fitbit Blaze exercise

Fitbit has equipped the Blaze with some dedicated exercise features. The standard exercise modes include Running, Cycling, Weights, Treadmill, Elliptical and Workout, although you can customise these. The Blaze will also attempt to automatically recognise when you’re exercising and identify what type of exercise you’re doing. In practice this works pretty well, although you do need to be exercising for at least ten minutes for this to work.

Fitbit Blaze tracked run

The running and cycling options will make use of the connected GPS feature, tracking your speed, distance, pace, route, etc. All the other options are essentially just timing your training session, measuring your heart rate and calculating calories burned accordingly. Unlike many dedicated sports watches, the Blaze won’t pair with additional sensors, so if you’ve got a speed or cadence sensor on your bike, you won’t be able to make use of them with the Blaze.

Fitbit Blaze training app

The FitStar integration brings another exercise option to the table, placing guided workouts on your wrist. Currently, you can choose from a 7-minute workout or a 10-minute abs workout. Whichever one you choose, the watch will display an animation that demonstrates each exercise, and then time you as you copy the demo.

The watch will vibrate to tell you when to start, and vibrate again to indicate when to stop. It’s quite a neat feature, and well implemented, but it’s also somewhat limited in its application. Wahoo fitness also uses the 7-minute workout with its TICKR-X chest strap, but has the advantage of counting all your reps as you exercise, while also ensuring that your form is correct. Obviously, since the Blaze is on your wrist and not around your chest, it can’t measure reps or judge form.

Given that FitStar offers a wide range of exercise options, one hopes that Fitbit will integrate more training plans into the Blaze. Ideally, you’d be able to choose which FitStar plans to load onto the Blaze, as well as being able to customise the intensity of the sessions. As it stands, though, the FitStar integration is a nice, but far from compelling, feature.

Fitbit ecosystem

Any fitness tracker is only really as good as the ecosystem that supports it. If the smartphone app is buggy or difficult to navigate, you’re not going to enjoy using it and consequently will lose interest in the device.
Fitbit Blaze app

Fitbit, however, has a very good supporting ecosystem, both in terms of mobile app and web portal. The app is a superb example of how to clearly present data in a visually appealing way. It’s easy to navigate, and syncs quickly with the Blaze whenever you open it up.

You can pair third-party apps with the Fitbit app, too. You can link your Fitbit account to your Strava account, for instance, so that whenever you go for a run or bike ride with the Blaze, it will automatically send your activity to Strava.

Likewise, you can link your MyFitnessPal account, which means that all the food you log will instantly sync with the Fitbit app and vice versa, giving you a dynamic calorie count throughout the day. Fitbit does have its own food logging database within its app, but the MyFitnessPal database is more extensive.

I was slightly disappointed that the Fitbit app doesn’t play nicely with the Withings HealthMate app, since I use a Withings smart scale to track my weight and pull that data into my activity stream. I understand that Fitbit has its own smart scale (the Aria), but I’d still like as many fitness tech platforms as possible to work together.

Fitbit Blaze sleeping and charging

Like other Fitbit trackers the Blaze will also track your sleep overnight, but while I’m happy to wear a regular size fitness tracker like the Fitbit Charge HR or Jawbone UP3 overnight, the Blaze is just a bit too bulky for that.

For testing purposes I did sleep wearing the Blaze and it gave a good account of itself, tracking light and deep sleep, as well as logging when I got up during the night. As always, though, I do question just how useful sleep tracking is – after all, it’s far easier to increase your activity levels than it is to reduce stress to try and improve your sleep.

Talking of sleeping, well waking up anyway, you can set silent alarms on the Blaze, just like on other Fitbit devices. The Blaze will then vibrate on your arm to wake you up, thus sparing your partner the annoyance of being woken unnecessarily.

If you’re thinking that the sleep tracking is a white elephant, since you’ll need to charge the Blaze overnight like a smartwatch, think again. Fitbit quotes around five days of use from a full charge, and although you won’t get near that if you’re running every day with the connected GPS active, I still managed three very active days on a charge. Even then, the Blaze wasn’t completely out of juice.

Fitbit Blaze notifications

The Blaze will relay certain notifications from your phone, but these are limited to text messages, calendar notifications and call alerts. By contrast, the Garmin Vivosmart HR was able to relay any alert from my phone, even from third party apps.

Fitbit says that it intentionally limits the notifications that are relayed to the Blaze since no one wants their wrist constantly buzzing. I understand that sentiment, but I’d rather be the one who decides which notifications are relayed and which aren’t, rather than being presented with an arbitrary and limited list.


The Fitbit Blaze is a difficult device to place. It’s larger and has more features than your average fitness tracker, but it’s not feature-packed enough to be considered a proper sports watch. It’s something of a smartwatch, but the limited notification relays mean that there are better fitness trackers in this respect, let alone actual smartwatches.

Even after living with the Blaze for a while, I’m still not exactly sure who it’s appealing to. It’s a decent-looking device, and Fitbit has designed its modular system very well – snapping the Blaze in and out of the strap frame is quick and simple. The optional accessories make it a respectable everyday watch, too – the leather strap looks great and is extremely comfortable to wear.
Fitbit Blaze straps

But those accessories raise another issue with the Blaze – cost. While £160 isn’t excessive, if you go for the leather strap, that’ll cost an extra £60. If you’re going to wear the Blaze everyday, the leather strap is a wise investment, but it pushes the price up to around £220. For that, you can buy a Moto 360 (with a leather strap) or most of the £260 Apple Watch Sport (with its smart new woven-nylon band).

READ NEXT: Which Fitbit is right for you?

So, returning to my original question, where does the Blaze fit? Well, it’s not a device for serious fitness folk, and it’s not a viable alternative to a smartwatch. I guess if you’re a beginner on the road to fitness and want a tracker that looks good enough to wear every day, with any outfit, then the Blaze is a viable option. But that’s a pretty narrow gap in the market to inhabit. For other options, see our pick of the best smartwatch and fitness trackers. If looks aren’t absolutely key to you, then Fitbit’s own excellent Charge HR will do much of what the Blaze will do for just £90. It may not be quite as stylish, but for most people it’s the better option. 

Wearing modesWrist strap
Heart-rate monitorYes
GPSNo (attached GPS)
DisplayYes (LCD, tap display)
WaterproofYes (splashproof)
Smartphone connection
OS supportAndroid, iOS
WirelessBluetooth 4.0
Battery sizeN/A
Battery life5 days
Buying information
Warranty1 year

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fitbit blaze review
Fitbit Blaze review: Still worth buying?
Fitness trackers

Discontinued, but still worth picking up?

£160 inc VAT (as of 26th of May)