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Fitbit Sense evaluation: An formidable smartwatch that takes on an excessive amount of


  • Always-on display is shiny and simple to see
  • Detailed sleep evaluation
  • ECG is straightforward to make use of
  • Built-in GPS

Don’t Like

  • Stress monitoring would not inform you a lot but
  • No onboard music storage
  • Not as responsive or quick as different smartwatches

The Fitbit Sense provides a complete slew of sensors to the Fitbit lineup to trace all the pieces from stress to blood oxygen ranges, temperature, sleep and even has an FDA-cleared electrocardiogram (ECG or EKG). On prime of all that, the $329 (£299, AU$499) Sense additionally doubles as an everyday smartwatch and fitness tracker. And whereas the Sense nonetheless has health at its core, it desires to be your each day wellness coach now, too.

Fitbit is attempting to bridge the hole between fitness and wellness with the Sense, a zone most wearables have been already navigating even earlier than the present COVID-19 well being disaster. The Apple Watch has been leaning to wellness and well being over the previous couple of years, with a brand new blood oxygen characteristic, ECG app and fall detection characteristic. Samsung’s newer Galaxy Watches embody these metrics, in addition to a stress check of its personal, whereas the Oura ring additionally collects temperature information just like the Sense. The finish objective for many of those is that every one this information could sometime assist establish the onset illnesses earlier than the person experiences any signs. But within the meantime all these charts, numbers and scores from the Sense can really feel overwhelming, particularly for somebody with no medical coaching.

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Fitbit Sense: A puzzle of knowledge out of your wrist


After two weeks carrying the Sense, now we have combined emotions about it. In brief, for those who wished a well being gadget to observe your each day stats, and likewise wished ECG on a Fitbit, that is your watch. But in any other case, the lower-priced Fitbit Versa 3 (which has the identical common options of the Sense, with out ECG and stress sensing) can be lots.

CNET’s Lexy Savvides and Scott Stein each wore the Fitbit Sense for this evaluation.

A well-recognized design for those who’re upgrading your Fitbit

The Sense has an identical design to the Versa, besides with a stainless-steel edge across the sq. watch face as an alternative of aluminum and a bunch of recent sensors inside, which does make it a tiny bit thicker. Along with the touchscreen, you work together with the Sense by means of an indented haptic facet button, which may do all the pieces from launching the Alexa sensible assistant to beginning a exercise. It feels extra comfy than the Versa 2, particularly throughout exercises and at bedtime, because of its extra rounded end. Those fiddly toggles used to modify out straps on earlier Fitbits are gone, thank goodness. They’ve been changed with fast launch buttons to make swapping bands out quite a bit simpler on the Sense. 


Lexy Savvides/CNET

The Fitbit Sense additionally has a quicker processor than the Versa 2, which makes interactions with the watch really feel snappier, however we nonetheless observed some lag when opening apps, elevating the watch to wake the display or swiping as much as see each day stats. It additionally takes about 30 seconds to sync new watch faces like with earlier Fitbits.

What it has improved is its charging station. Instead of the alligator-style clips from earlier Fitbits, the Sense makes use of a brand new magnetic charger that simply attaches to the again of the watch. 

The ECG characteristic is straightforward to make use of

The Sense is the primary Fitbit to incorporate an onboard ECG app able to producing a single-lead electrocardiogram learn in 30 seconds. Fitbit says that the ECG on the watch may even display for potential arrhythmias that would point out atrial fibrillation, or aFib, however it could possibly’t detect coronary heart assaults or different cardiac circumstances. It not too long ago obtained FDA clearance within the US and it is now accessible to be used within the US, some European nations and Hong Kong. You can find a full list here.

To take an ECG, you first must undergo a fast Heart Rhythm Assessment briefing within the Fitbit app (go to Discover > Assessments & Reports). Once full, the ECG app ought to seem on the Sense. Take a seat and place your thumb and index finger on reverse corners of the watch and you may see one in every of three outcomes after your scan is full, relying on the guts rhythm: regular sinus, indicators of atrial fibrillation or inconclusive. You can even evaluation the leads to the Fitbit app and share along with your physician.


Lexy Savvides/CNET

Samsung has obtained an identical clearance for the characteristic on its two newer Galaxy Watches, whereas Apple’s ECG app has been energetic on the Apple Watch for the reason that firm launched the Series Four in 2018. It additionally notifies you of irregular coronary heart rhythms indicative of aFib, plus excessive and low coronary heart fee alerts, as does the Sense. The ECG and coronary heart fee notifications work in an identical means between the Sense and Apple Watch, though to take an ECG on the Apple Watch you place one finger on the digital crown fairly than the 2 fingers on the rim of the Sense.

Stress monitoring is barely useful for those who already know how one can handle it

While the Sense is not the primary wearable gadget to trace stress, its technique of retrieving this data is exclusive. Rather than specializing in coronary heart fee like Samsung’s Galaxy Watches, the Sense additionally makes use of sweat information from its new electrodermal exercise, or EDA sensor to find out stress ranges. To measure your ranges, you place the palm of your reverse hand over the stainless-steel rim on the highest of the watch. The palm’s contact on the watch’s metallic rim completes a circuit, then makes use of the EDA sensor to measure potential sweat-triggered stress markers. The total course of takes two minutes.

It’s somewhat bizarre at first as a result of you possibly can’t see something on the display whilst you’re doing the scan, however as soon as it is full, you will obtain a vibration. You can even log how you’re feeling on the finish of the check, see your EDA responses and verify in case your coronary heart fee went up or down. Fitbit provides guided audio meditation classes for Fitbit Premium customers to pair with the EDA scan, though we did not discover them notably useful or stress-free.

The stress outcomes up to now have been imprecise. One of Scott’s preliminary readings confirmed just a few EDA moments, that are these sweat-triggered incidents. But for probably the most half he gave the impression to be stress-free, based on the Sense. Considering he wore the Sense all through a pandemic with two young children at house and through one of many busiest work weeks of the 12 months, this studying didn’t replicate the truth he skilled. The app additionally did not appear to supply any significant context as to why he skilled these early incidents or how one can enhance on his outcomes. Lexy had comparable issue decoding the EDA moments, of which she had 17 throughout one notably annoying day on deadline. The Fitbit gave no indication as as to whether this was a standard quantity or trigger for concern. 


After every EDA scan you possibly can see your coronary heart fee, what number of EDA responses have been measured, then replicate on how you’re feeling, starting from “very stressed” to “calm.”

Screenshot by Scott Stein/CNET

Fitbit does, nonetheless, present a brand new Stress Management rating in the beginning of every day that takes under consideration sleep, bodily exercise and stress to offer you a “how you’re doing” quantity. It’s just like the daytime equal of the Sleep Score from earlier Fitbits. This information may very well be useful for restoration: For instance, you probably have a decrease rating you would possibly wish to deal with getting extra restorative sleep fairly than pushing your self on a exercise.


The each day stress rating within the Fitbit app.

Screenshot by Scott Stein/CNET

But the Stress Management readings proper now aren’t notably user-friendly and it could possibly take just a few days for them to point out up after you first begin carrying the Sense. Lexy’s scores diversified from 78 to 92, normally averaging within the 80s. The next Stress Management rating means issues are usually good. But even on days when her rating managed to tip into the 90s, it did not essentially correlate with the quantity of stress she felt. The Fitbit app would not present customized suggestions that can assist you interpret or enhance your rating so determining what to do with it may be a little bit of a thriller. 

You do not want a Fitbit Premium account to entry a lot of this information, however you will want one to get the additional meditation options, insights from the stress sensor, additional stats about your sleeping coronary heart fee and minute-by-minute pores and skin temperature variations throughout sleep. Fitbit is making further well being information, corresponding to coronary heart fee variability and SpO2 developments over time, accessible to everybody with a appropriate gadget within the coming months. But for that different information you will must pay $10 a month for a premium subscription, which is turning into an essential a part of the Fitbit expertise. 

Read extra: How the Fitbit Sense tracks stress.

SpO2 monitoring is barely whilst you sleep

The Fitbit Sense would not take SpO2 or blood oxygen readings on demand like Samsung’s Galaxy Watch 3 or the Apple Watch Series 6. Instead, it measures blood oxygen ranges whilst you sleep. The Series 6 additionally measures SpO2 ranges at evening.

To do that you need to obtain and choose the particular SpO2 watch face earlier than you go to mattress. About 45 minutes to an hour after waking, you will see the SpO2 rating seem on the watch face. You’ll additionally be capable of see the graph of your blood oxygen variations within the sleep part. (There aren’t any particular numbers, simply a sign in case your oxygen variation is excessive or low.) Remembering to modify to the SpO2 watch face manually each evening is annoying and simple to overlook earlier than you collapse into mattress, however Fitbit is engaged on methods to carry the SpO2 rating to different watch faces. As with the stress rating, it is troublesome to know what to do along with your SpO2 studying until you are a medical skilled. And it is not potential to check the sensor in opposition to a pulse oximeter, a tool docs use to measure blood oxygen ranges out of your fingertip, because the Sense’s SpO2 readings are taken at evening and averaged out.


Scott Stein/CNET

It’s additionally value noting that SpO2 can be accessible on the Versa 2 and Versa Three with the identical watch face. Sleep monitoring is nice on the Sense and it really works in just about the identical means as earlier Fitbits with an in depth breakdown in your levels of sleep and provides you a sleep rating every morning.

Temperature monitoring on the Sense can be solely at evening

Temperature monitoring on the Sense is much like SpO2 in that it would not present a measurement on demand, however fairly reveals whether or not you have deviated out of your baseline in a each day graph. Needless to say, it will not substitute your thermometer any time quickly. You’ll must log about three nights of sleep for the Sense to ascertain a baseline from which to go by. Like the Oura ring, which we have additionally been testing for just a few months, it is a doubtlessly useful solution to get an concept of your temperature fluctuations over time and point out potential fevers earlier than you would possibly pay attention to them.

Unfortunately (or fortuitously), we have not been sick within the interval the place we have been monitoring our temperatures and have not skilled any important variances from the baseline to report on. Fitbit is promising that the Sense may even replicate temperature variations resulting from menstrual cycles, and it did appear to point out a dip in Lexy’s pores and skin temperature earlier than the beginning of a cycle. Basal physique temperature is usually utilized by ladies to foretell fertility, as ovulation usually causes a slight improve in temperature, or a dip in temperature earlier than a interval. Like different Fitbits, the Sense has cycle monitoring which you’ll log within the app, or see the place you’re in your cycle on the watch.


Screenshot by Lexy Savvides/CNET

Fitness monitoring: Not a lot has modified

One of the downsides of Fitbits that launched after the Ionic in 2017 was lack of onboard GPS. Starting with the Charge 4 earlier this 12 months, Fitbit has lastly introduced again GPS so you do not have to take your cellphone with you on an out of doors run or trip to trace your route. It takes round 10 seconds to accumulate a lock whenever you begin an out of doors exercise, with or with out your cellphone close by.


The Sense can present you what coronary heart fee zone you are in and encourage you to push tougher (or again off).

Lexy Savvides/CNET

If you have used every other Fitbit lately, the remainder of the health monitoring options on the Sense will appear acquainted. You’ll nonetheless be capable of monitor your steps, begin a goal-based exercise, see your coronary heart fee zone and keep watch over energy burned. What is new is the addition of Active Zone Minutes, which we first noticed within the Charge 4. This makes use of your age and resting coronary heart fee to point out you the way exhausting you labored out throughout an exercise. You’ll additionally obtain real-time alerts whenever you’ve modified zones, which may also help you’re taking motion throughout your exercise, whether or not that is pushing your self a bit extra or easing off relying in your targets. For Lexy, it was most useful throughout an out of doors run so she knew when to go a bit quicker (normally, that is on a regular basis).

Despite the Sense having the identical common health options, it has its benefits in a exercise. The display is brighter than the Versa and earlier Fitbit trackers, so it is comparatively simple to see in daylight so long as you make sure the brightness is ready to most. It’s additionally comfy to put on, and due to its flat profile it would not get in the way in which even whenever you’re working up a sweat.

We in contrast the Sense in opposition to a chest strap to check coronary heart fee monitoring accuracy. While it matched up pretty persistently to the strap for resting coronary heart fee, it took not less than 5 to 10 seconds to catch as much as the strap throughout a exercise when coronary heart fee spiked (like when going from a mild jog to a full dash).


Lexy Savvides/CNET

Battery life is sweet, however not as sturdy as different Fitbits

With the always-on show energetic, two 30-minute exercises, just a few stress measurements and a full evening of sleep monitoring, the Sense met the two-day battery life declare. Turning off that always-on show and simply utilizing increase to wake helped increase the battery to round 4.5 days between costs. That mentioned, outside exercises appear to be a ache level for the battery. Lexy observed after a very strenuous 2.5 hour outside bike trip, the battery dipped virtually 50%.

More smartwatch options coming quickly (we hope)

The Sense works with Android and iOS and the expertise is constant throughout ecosystems, aside from not with the ability to reply to textual content messages from the watch whenever you’re on iOS. There’s a microphone and speaker onboard so you can take fast calls out of your wrist along with your cellphone close by. If you may have an Android cellphone, you will additionally be capable of use dictation or voice-to-text to answer messages. Google Assistant assist can be on the way in which, hopefully by the tip of the 12 months, which can enhance on the sluggish and restricted Alexa performance.


Lexy Savvides/CNET

You can retailer songs for offline listening from Pandora or Deezer you probably have a premium subscription, however the Sense will solely function a distant management for Spotify. 

You cannot retailer your personal music on the Sense, nonetheless, which is an enormous draw back for those who wish to take heed to songs throughout a exercise and do not wish to take your cellphone with you. 

A great, however not nice smartwatch for the value

The Fitbit Sense hits the mark in some ways: It has sturdy battery administration, wonderful sleep monitoring and an array of recent sensors that may very well be useful to some folks. But it feels prefer it’s attempting to perform a little an excessive amount of directly, with options like stress administration seeming extra complicated than useful. That mentioned, Fitbit has a monitor file of including new options, like unlocking temperature monitoring in earlier variations, or including a coloration always-on show to the Versa 2 just a few months after launch. So there’s extra potential within the Sense and the way it interprets all this information for you additional down the road. Even so, you could be higher off with a extra primary and succesful Fitbit Versa 3. That means you will avoid wasting {dollars} and look ahead to Fitbit to work out its new sensor tech for a later era of Sense.

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