Fitbit Cost Four evaluation

Fitbit’s high exercise tracker, the Cost Four boasts a bunch of recent options and features that rival even Fitbit’s pricier health smartwatches. Our Fitbit Cost Four evaluation will look into all these health and health-related options, present how they work within the app, and examine it with different trackers.

The Cost Four matches the exercise tracker with the highest smartwatches. In some methods, the primary distinction is the monochrome touchscreen.

The Cost Four has every thing the Cost Three had and makes the tracker even higher. Even homeowners of the superb Fitbit Versa 2 smartwatch will look enviously at a number of the new options Fitbit’s tracker brings to the desk.

The Cost Four debuted Lively Zone Minutes (AZM), a personalised health problem that counts all actions that push your coronary heart fee up – be that operating, weights, biking or dancing. The tougher you push your self (into Cardio and Peak zones), the extra credit score Fitbit offers you. This has now been rolled out to the Sense and Versa sequence smartwatches, and the entry-level Encourage 2 tracker.

On high of AZM, the Cost Four comes with built-in GPS and Spotify Join & Management – each not out there on the older Cost 3. It is the most cost effective Fitbit with built-in GPS too.

• Finest Fitbit 

The Fitbit Cost Four is primarily a health tracker, however comes with different health-focused options and useful on-screen notifications, akin to texts and caller ID.

On this Fitbit Cost Four evaluation, we’ll take a look at all of the options (health, wellbeing, notifications, apps, and many others), and examine it to the opposite Fitbits, particularly the earlier Cost Three and the current Encourage 2.

February 2021 replace: The Cost Four now has entry to expanded blood oxygen information (SpO2) measurements and pores and skin temperature monitoring. And customers can see seven-day tendencies for Respiration Charge, Coronary heart Charge Variability, and Resting Coronary heart Charge within the app’s Well being Metrics dashboard – beforehand out there solely to Premium subscribers (who do get to see 30-day tendencies, as properly).

Fitbit Cost Four is full of options

Beginning with the fundamentals, the Cost Four tracks steps, distance, energy burned, hourly exercise, flooring climbed, coronary heart fee, swim-tracking, and sleep.

Packed into the small tracker are a 3-axis accelerometer, optical coronary heart fee monitor, GPS, vibration motor, NFC chip (for Fitbit Pay), altimeter, and Bluetooth LE (BLE).

Coronary heart-rate monitoring is nice for monitoring calorie burn and getting real-time steering to optimise your exercises. Additionally it is used for superior sleep monitoring.

As well as, the Cost Four options most of Fitbit’s extra superior features, together with Cardio Health Degree (through three totally different heart-rate zones), guided respiration, transfer remindersauto-exercise recognition, assist for train modes akin to run, bike, swim, treadmill, weights, yoga, and circuit coaching; feminine health-tracking (observe signs, log moods, examine cycles and extra); Sleep Rating, alarms, timers, calendar and climate apps; and might show notifications akin to caller ID, texts, calendar, WhatsApp, and extra.

Finally! GPS built-in

New to the Cost 4 (and a primary on Fitbit’s non-smartwatch trackers) is built-in GPS.

Having GPS constructed right into a tracker delivers deeper health and well being evaluation to enhance your runs and cycle exercises, akin to tempo, relaxation occasions, pace and extra.

Most Fitbit tracker wristbands permit you to hook up with your telephone’s GPS, however this fashion doesn’t all the time clock the proper distance travelled, because it calculates stride size to estimate this.

Now you are capable of log correct real-time tempo and distance if you go operating, using or mountain climbing, whereas leaving your telephone at house.

There are six GPS-compatible train modes on the Cost 4: Run, Bike, Stroll, Treadmill, Out of doors Exercise, and Hike. A hike is considered extra strenuous than a stroll, and burns extra energy.

Different GPS actions embrace downhill and cross-country snowboarding, kayaking and browsing.

A exercise depth map exhibits your GPS-monitored route, distance, achieved heart-rate zones and tempo by kilometre or mile. You possibly can faucet the map to see extra detailed stats about your exercise as properly.

GPS is ready as “on” by default when you choose an train mode, however to save lots of battery life you’ll be able to flip it off. Like most high-end Fitbits, the Cost Four can use Run Detect and Auto Cease to work out that you’re going for a run, however received’t robotically fireplace up the GPS.

Dynamic GPS is an optionally available new operate that may intelligently sense in case your telephone is with you if you’re utilizing the GPS monitoring constructed into the Cost 4. If it is close to, the Fitbit makes use of the telephone’s GPS location to protect the tracker’s battery life. 

House owners of the Versa 2 will little doubt be jealous, as that smartwatch lacked built-in GPS. The newer Versa Three and Sense do sport built-in GPS, too.

Lively Zone Minutes

Lively Zone Minutes (AZM) was seen first on the Cost 4. This metric is personalised primarily based in your resting coronary heart fee and age. It tracks any exercise that raises your coronary heart fee – from a brisk stroll to operating, indoor biking and yoga. It measures the time you spend in every coronary heart fee zone.

Fitbit measures three energetic heart-rate zones: beginning with Fats Burn, by Cardio to Peak.

Fitbit makes use of your “heart-rate reserve”, which is the distinction between your most coronary heart fee and your resting coronary heart fee. It’s a sign of your total cardiovascular health. Your resting coronary heart fee might be lowered by growing your health stage.

You possibly can set your individual aim, however the default is a weekly aim of 150 minutes (as beneficial by the World Well being Group and the NHS).

AZM isn’t actually that new. Fitbit has measured Lively Minutes for a very long time. Now, nonetheless, it has gamified the metric a little bit and makes use of the heart-rate zones in a extra upfront method. You earn one credit score for every minute of average exercise within the Fats Burn zone and two for extra vigorous exercise in Cardio and Peak zones.

Every time you modify heart-rate zones the tracker offers you real-time alerts in your wrist, so you’ll be able to push tougher (or reduce) to make your exercises extra environment friendly. You may get an in depth abstract of your motion by the center fee zones within the Fitbit cellular app.

It is loads like Garmin’s Depth Minutes function on its wearables.

Lively Zone Minutes is now out there on all Fitbit smartwatches, in addition to the Cost Four and Encourage 2. We fee it as a brand new motivating metric to set your targets round.

Carry on transferring

From the clock face, you swipe as much as see the At the moment app, which exhibits your every day stats (customisable), together with Reminders To Transfer, which is able to immediate you to rise up out of your chair and begin transferring for not less than 250 steps per hour of the day.

Reminders to Transfer is a good way to be sure to don’t keep sitting for too lengthy – and we spend over half our day sat down. It’s not nearly getting your steps up and burning a number of extra energy. Sedentary individuals have as much as a 49% larger threat of early loss of life. To take two examples, sedentary behaviour results in a 112% enhance in your threat of getting Sort 2 diabetes, and 147% enhance within the threat of coronary heart illness.

Sleep monitoring, Guided Respiration and SpO2

Sleep is a key well being and wellbeing indicator, and the Cost Four offers you a Sleep Rating primarily based on detailed Time Asleep, Deep and REM sleep levels, plus ‘Restoration’ – the time that your sleeping coronary heart fee is under your common waking coronary heart fee. Solely Fitbit Premium subscribers get to see Restoration information, which is a disgrace, however you’ll be able to reside with out it as you get to see your total Sleep Rating regardless.

The very first thing I do after I wake is to examine my Sleep high quality on the Fitbit app, and that is one in all my favorite options. Getting an honest evening’s sleep is as vital as hitting these 10,000 steps.

One annoyance is that my resting coronary heart fee could be very low (54bpm), and so getting under this whereas asleep appears harder for me than somebody with a resting coronary heart fee of 64-100bpm.

The tracker is mild and cozy to put on, and it received’t cease you from sleeping, except you set the silent alarm to vibrate, in fact.

The tracker now options Sensible Wake, a Fitbit smartwatch function that buzzes you throughout mild sleep inside the 30 minutes of your set alarm to wake you in a calmer approach than a sudden alarm.

When not sleeping, you’ll be able to nonetheless chill out through the use of the calming Guided Respiration Periods primarily based in your coronary heart fee.

One other well being metric you’ll discover underneath the Sleep part of the app is Estimated Oxygen Variation, which makes use of an Sp02 sensor to graph an estimation of the oxygen-level variability in your bloodstream – which might present doubtlessly dangerous variations in your respiration throughout sleep.

Cost Four customers can now additionally see their blood oxygen studying on the wrist, following an replace in February 2021.

• Fitbit well being and health scores and stats defined

Apps and non-health features

One of many smartest non-fitness or health-related options is Notifications. The Cost Four will gently buzz you if you get a name in your telephone (and present caller ID), textual content messages and pushes from the likes of WhatsApp. Android customers may even ship Fast Replies straight from the tracker. These might be turned on and off to your liking from each the tracker and within the cellular app.

You additionally get a three-day climate forecast app, set to your location. Plus a brand new app, Agenda, which you’ll be able to sync with a calendar.

And, new to the Cost household, are Spotify controls. You possibly can’t really retailer any music on this tracker, as you’ll be able to with the Versa 2 smartwatch, however you’ll be able to select the music output, play, shuffle and skip content material, browse current playlists and podcasts, and even Like songs. It requires the premium Spotify subscription.

Now all fashions of the Cost Four function contactless Fitbit Pay – which works identical to Apple or Google Pay. On the Cost 3, solely the Particular Version had Pay. That stated, the variety of collaborating banks within the UK continues to be fairly pitiful.

You possibly can set Alarms, and use the tracker as a Stopwatch or Timer.

Sensible Wake lets the tracker set alarms and wake you at the absolute best occasions relying in your sleep cycles to make sure you’re well-rested and able to wake at an optimum time near if you set your alarm.

The tracker comes with 24 totally different clock faces to select from, though these aren’t as dynamic and vibrant as those you will get for the Fitbit Versa and Ionic smartwatches.

Regardless of backlighting, the show might be tough to learn in shiny daylight and nearly inconceivable to view with sun shades on. Once more, solely the smartwatches repair this drawback.

Show On Settings permits you to regulate the time your Cost Four display screen stays on with every view.

Design and straps

The Cost Four appears to be like very very like the Cost 3. Whereas the Cost Three tracker was made from aluminium, the Cost 4 tracker has a plastic resin case – so it’s much more light-weight (44g in comparison with 47g) regardless of packing extra inside. The Versa 2 is 60g, so if each gram counts, the Cost Four wins on this issue.

It has an inductive, quite than a bodily button, on the left edge, which aids its water resistance (as much as 50m).

To navigate to its many options, you faucet, scroll and swipe the backlit 100×160 OLED touchscreen.

The tracker itself comes with each Small and Massive sizes of removable wristband – a swim-proof Traditional band created from elastomer in one in all three colors and the black Particular Version, which comes with a Granite Reflective Woven band, plus an additional Black Traditional band.

The tracker itself might be swapped between totally different wristbands. For the Cost Four these embrace: Sports activities (£19.99 / $29.95 / €29.95), Horween Leather-based (£59.99 / $49.95 / €69.95), Woven (£24.99 / $34.95 / €39.95), and Traditional (£19.99 / $29.95 / €29.95).

The Traditional and Sports activities bands are sweat and swim-proof, whereas the Woven and Leather-based bands aren’t meant for high-intensity exercises. As such, you’ll have to swap to one of many different bands when swimming or working up a sweat.

The accent bands can be found in both Small (matches wrists 5.5-7.1in or 140-180mm) or Massive sizes (7.1-8.7in, 180-220mm). Fitbit has a sizing instrument that you would be able to print out to see which measurement matches you.

To make it simpler, listed below are the out there Cost Four bands in all their glory. They match each the brand new Cost Four and the older Cost 3. 

Battery life

The Cost Four boasts one in all Fitbit’s longest-ever battery life spans, at as much as seven days – bettered solely by the Encourage 2’s 10 days. Examine that to the Apple Watch, which has an 18-hour battery life and normally requires an in a single day cost.

After all, battery life varies with use and different elements. Fitbit claims that it’ll last as long as 5 hours with steady GPS use. Apple says that its smartwatch lasts an hour longer with GPS use.

The tracker comes with its personal charging cable, which surprisingly appears to be incompatible with the Cost Three and vice versa, however Fitbit has an extended historical past of making new chargers for every mannequin of tracker and smartwatch.

Battery life is vital as no Fitbit person desires to get up earlier than an extended stroll or run to search out their tracker wants charging – a feat that’s tough to attain whereas on the transfer, even with an influence financial institution.

And speaking of waking up, that lengthy battery life permits Fitbit to correctly monitor the standard of your sleep, which the Apple Watch can’t do if it’s charging in a single day.

Fitbit app and Challenges

One of many biggest issues about Fitbit is the easy however cellular app, the place you will discover the stat-packed customisable dashboard, Leaderboard to inspire you towards/with family and friends, and particular Challenges and Adventures you’ll be able to set your self or get aggressive together with your buddies.

Alongside the same old Journey races, there is a new Get Match Bingo problem, which you’ll be able to invite as much as 30 individuals to affix.


The beneficial retail worth for the Fitbit Cost Four is £129.99 / US$149.95 / €149.95. Preserve a lookout for reductions and the greatest Fitbit offers.

There’s additionally a Particular Version Cost 4, promoting for £149.99 / $169.95 / €169.95. This presents a few unique wristbands – together with a quite natty woven one – however isn’t any totally different by way of options and features. (Prior to now, Particular Version fashions had an additional function or two, however that is only a distinctive search for that additional few kilos or {dollars}.)

Cost Four vs older and cheaper Fitbits

To closest comparisons are Fitbit Cost Four vs Cost 3, the place you would possibly discover a deal on the older tracker, Fitbit Cost Four vs Encourage 2, the place you possibly can avoid wasting cash by dropping some options, and Fitbit Cost Four vs Versa 2 the place you pay extra for a smartwatch with a big, color touchscreen. 

On the entry-level, the Encourage 2 boasts plenty of what the Cost Four presents, however lacks the built-in GPS, altimeter, and the power to do extra on the tracker itself with out having to open the Fitbit app. We additionally favor the Cost 4’s show. Learn our Fitbit Encourage 2 evaluation. 

For all Fitbit fashions, learn our full record of the greatest Fitbit for you – primarily based in your wants and funds. 


We have been massive followers of the Cost 3, and we love the Fitbit Cost Four an entire lot extra – thanks partly to its nice new options, particularly the personalised Lively Zone Minutes, which add a brand new motivational health metric to intention for. It’s our new favorite all-round Fitbit tracker and it bests even the Versa 2 smartwatch with its built-in GPS, and matches even the Versa Three in some ways.

In order for you on-screen exercises, a color display screen, voice assistant, and entry to extra apps, you’ll wish to think about one of many Fitbit smartwatches. However the Fitbit Cost Four has all of the features you want to inspire your self to turn into fitter and usually more healthy at a worth that we predict is affordable for such a fully-featured wearable.

Fitbit Cost 4: Specs

Tracks steps, distance, energy burned, hourly exercise, flooring climbed, coronary heart fee, swim tacking, and sleep

About the author: SubSellKaro

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