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Fitbit Sense evaluate: An formidable smartwatch that is getting higher with time


  • Always-on display screen is vivid and simple to see
  • Detailed sleep evaluation
  • ECG is straightforward to make use of
  • Built-in GPS
  • Google Assistant is flexible

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 an entire slew of sensors to the Fitbit lineup to trace all the things 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 a daily smartwatch and fitness tracker. And whereas the Sense nonetheless has health at its core, it needs to be your every 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 function, ECG app and fall detection function. Samsung’s newer Galaxy Watches embrace 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 aim for many of those is that every one this information might sometime assist establish the onset illnesses earlier than the consumer 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 months with the Sense, we now have blended emotions about it. In quick, in order for you a well being system to watch your every 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 loads.

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

A well-known design should you’re upgrading your Fitbit

The Sense has an analogous design to the Versa, besides with a chrome steel edge across the sq. watch face as an alternative of aluminum and a bunch of latest sensors inside, which does make it a tiny bit thicker. Along with the touchscreen, you work together with the Sense via an indented haptic aspect button, which may do all the things from launching Alexa (or the Google Assistant) to beginning a exercise. It feels extra comfy than the Versa 2, particularly throughout exercises and at bedtime, due to its extra rounded end. Those fiddly toggles used to change out straps on earlier Fitbits are gone, thank goodness. They’ve been changed with fast launch buttons to make swapping bands out loads simpler on the Sense. 


Lexy Savvides/CNET

The Fitbit Sense additionally has a sooner processor than the Versa 2, which makes interactions with the watch really feel snappier, however we nonetheless seen some lag when opening apps, elevating the watch to wake the display screen or swiping as much as see every 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 function 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 will even display screen for potential arrhythmias that would point out atrial fibrillation, or aFib, however it might probably’t detect coronary heart assaults or different cardiac situations. It just lately acquired FDA clearance within the US and it is now obtainable 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 will see considered one of three outcomes after your scan is full, relying on the guts rhythm: regular sinus, indicators of atrial fibrillation or inconclusive. You may also evaluate the leads to the Fitbit app and share along with your physician.


Lexy Savvides/CNET

Samsung has acquired an analogous clearance for the function 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 charge alerts, as does the Sense. The ECG and coronary heart charge notifications work in an analogous means between the Sense and Apple Watch, though to take an ECG on the Apple Watch you place one finger on the digital crown relatively than the 2 fingers on the rim of the Sense.

Stress monitoring is simply useful should you already know tips on how to handle it

While the Sense is not the primary wearable system to trace stress, its methodology of retrieving this info is exclusive. Rather than specializing in coronary heart charge 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 steel rim completes a circuit, then makes use of the EDA sensor to measure potential sweat-triggered stress markers. The whole course of takes two minutes.

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

The stress outcomes up to now have been imprecise. One of Scott’s preliminary readings confirmed a couple of EDA moments, that are these sweat-triggered incidents. But for probably the most half he gave the impression to be stress-free, in keeping with the Sense. Considering he wore the Sense all through a pandemic with two young children at residence and through one of many busiest work weeks of the 12 months, this studying didn’t replicate the fact he skilled. The app additionally did not appear to offer any significant context as to why he skilled these early incidents or tips on how to enhance on his outcomes. Lexy had related problem deciphering the EDA moments, of which she had 17 throughout one significantly irritating day on deadline. The Fitbit gave no indication as as to if this was a traditional quantity or trigger for concern. 


After every EDA scan you may see your coronary heart charge, 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 firstly of every day that takes into consideration sleep, bodily exercise and stress to present you a “how you’re doing” quantity. It’s just like the daytime equal of the Sleep Score from earlier Fitbits. This information might be useful for restoration: For instance, if in case you have a decrease rating you may need to give attention to getting extra restorative sleep relatively than pushing your self on a exercise. 


The every day stress rating within the Fitbit app.

Screenshot by Scott Stein/CNET

But the Stress Management readings proper now aren’t significantly user-friendly and it might probably take a couple of days for them to indicate up after you first begin carrying the Sense. Lexy’s scores various from 78 to 92, often averaging within the 80s. A better Stress Management rating means issues are typically 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 personalised 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. But a month or so after the Sense launched, we seen a immediate seem within the app saying the best way the Stress Management rating is calculated has been improved. We’ll replace this evaluate if we discover any important variations from our preliminary testing.

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

Read extra: How the Fitbit Sense tracks stress.

SpO2 monitoring solely runs when 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 when you sleep. The Series 6 additionally measures SpO2 ranges at evening.

All you want to do to measure your SpO2 when you sleep is to put on it to mattress. In the morning, you may verify your SpO2 degree within the Fitbit app. You’ll additionally have the ability to see the graph of your blood oxygen variations. (There aren’t any particular numbers, simply a sign of whether or not your oxygen variation is excessive or low.)

Note that at launch, the Sense required you to pick a selected SpO2 watch face earlier than you went to mattress as a way to observe SpO2. Your degree would then seem on the watch face about 45 minutes to an hour after waking. If you favor to see the blood oxygen degree in your wrist as an alternative of via the app, you may nonetheless choose the SpO2 watch face earlier than you go to mattress. Fitbit says there can be seven extra SpO2 watch faces obtainable within the app gallery by the tip of the 12 months.

As with the stress rating, it is troublesome to know what to do along with your SpO2 studying except you are a medical skilled. And it is not potential to check the sensor in opposition to a pulse oximeter, a tool medical doctors 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 obtainable on the Versa 2 (with the precise watch face) and the Versa Three which works in the identical means because it does on the Sense, so that you needn’t choose the SpO2 watch face earlier than retiring. 

Sleep monitoring is nice on the Sense and it really works in just about the identical means as earlier Fitbits. It offers you an in depth breakdown in your levels of sleep and a sleep rating every morning.

Temperature monitoring on the Sense can be solely at evening

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

Unfortunately (or thankfully), we’ve 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 will even replicate temperature variations resulting from menstrual cycles, and it did appear to indicate 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 enhance in temperature, or a dip in temperature earlier than a interval. Like different Fitbits, the Sense has cycle monitoring which you’ll be able to log within the app, or see the place you might be 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 journey to trace your route. It takes round 10 seconds to amass a lock once you begin an out of doors exercise, with or with out your cellphone close by.


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

Lexy Savvides/CNET

If you have used another Fitbit in recent times, the remainder of the health monitoring options on the Sense will appear acquainted. You’ll nonetheless have the ability to observe your steps, begin a goal-based exercise, see your coronary heart charge zone and control 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 charge to indicate you ways laborious you labored out throughout an exercise. You’ll additionally obtain real-time alerts once you’ve modified zones, which may also help you are 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 sooner (often, that is on a regular basis).

Despite the Sense having the identical common health options, it has its benefits in a exercise. The display screen 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 about to most. It’s additionally comfy to put on, and due to its flat profile it would not get in the best way even once you’re working up a sweat.

We in contrast the Sense in opposition to a chest strap to check coronary heart charge monitoring accuracy. While it matched up pretty constantly to the strap for resting coronary heart charge, it took no less than 5 to 10 seconds to catch as much as the strap throughout a exercise when coronary heart charge spiked (like when going from a mild jog to a full dash).


Lexy Savvides/CNET

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

With the always-on show energetic, two 30-minute exercises, a couple of 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 elevate to wake helped enhance the battery to round 4.5 days between fees. That mentioned, out of doors exercises appear to be a ache level for the battery. Lexy seen after a very strenuous 2.5 hour out of doors bike journey, the battery dipped virtually 50%.

More smartwatch options are being added over time

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 once you’re on iOS. There’s a microphone and speaker onboard so now you can take fast calls out of your wrist along with your cellphone close by. You may also change the decision forwards and backwards between your cellphone and the watch, which is a pleasant contact. The speaker sounds high-quality for a fast name, however we would not need to use it for any prolonged conversations. If you might have an Android cellphone, you may additionally have the ability to use dictation or voice-to-text to answer messages. 

Google Assistant on the Sense has rolled out with the replace to Fitbit OS 5.1 and works throughout Android and iOS. Once you hyperlink your Google account and comply with share info between the Fitbit app and the Assistant, you may ask the Assistant to do all the things from present your sleep rating, or begin a selected exercise like a run. It’s responsive and much more useful than the gradual and restricted Alexa performance, which can be obtainable on the Sense. You cannot, nonetheless, ship textual content messages or begin a name along with your voice utilizing the Google Assistant but.


Lexy Savvides/CNET

You can retailer songs for offline listening from Pandora or Deezer if in case you 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 a giant draw back should you wish to take heed to songs throughout a exercise and do not need to take your cellphone with you. 

An excellent, however not nice smartwatch for the worth

The Fitbit Sense hits the mark in some ways: It has sturdy battery administration, glorious sleep monitoring and an array of latest sensors that might be useful to some individuals. It feels prefer it’s attempting to do some an excessive amount of directly, with options like stress administration seeming extra complicated than useful. That mentioned, within the months since its launch, Fitbit has added new options together with automated SpO2 monitoring at evening, Google Assistant assist and the power to take calls out of your wrist that has improved the general expertise.

But except you want an ECG and the stress tracker, you could be higher off with a extra fundamental and succesful Fitbit Versa 3, which has most of the similar options because the Sense. That means you may avoid wasting {dollars} and watch for Fitbit to iron out the kinks for the following technology of Sense.

The info contained on this article is for academic and informational functions solely and isn’t supposed as well being or medical recommendation. Always seek the advice of a doctor or different certified well being supplier concerning any questions you will have a few medical situation or well being goals.

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