
Fitbit Sense Advanced Smartwatch with Tools for Heart Health, Stress Management & Skin Temperature Trends, Sage Grey/Silver, One Size (S & L Bands Included)
$249.95 Original price was: $249.95.$233.86Current price is: $233.86.
Price: $249.95 - $233.86
(as of Mar 04, 2025 05:30:43 UTC – Details)
Meet Fitbit Sense—the advanced smartwatch that helps you tune in to your body and guides you toward better health. Assess your heart for atrial fibrillation (Afib) with a compatible ECG app right on your wrist, track & manage stress, better understand your sleep quality and even keep an eye on patterns in your skin temperature. Plus, Sense unlocks a 6-month free trial of personalized guidance and advanced insights from Fitbit Premium for new users. Fitbit is part of the Google family. Requires use of Fitbit app with compatible iPhone or Android devices. A Google account will be required.
Product Dimensions : 1.59 x 1.59 x 0.48 inches; 7.05 ounces
Item model number : FB512SRSG
Batteries : 1 Lithium Ion batteries required. (included)
Date First Available : August 16, 2021
Manufacturer : Fitbit Inc
ASIN : B09B7W8K38
Optimize your workouts with a Daily Readiness Score that reveals if you’re ready to exercise or should focus on recover (requires Fitbit Premium membership. Premium content recommendations are not available in all locales and may be in English only)
EDA Scan app detects electrodermal activity which may indicate your body’s response to stress and a built-in skin temperature sensor logs yours each night so you can see when it varies
With a compatible ECG app right on your wrist, assess your heart for atrial fibrillation–a heart rhythm irregularity–and share the results with your doctor (Only available in select countries. Not intended for use by people under 22 years old)
An on-wrist skin temperature sensor tracks yours each night so you can see how it varies
Includes a 6-month Premium membership complete with personalized insights, advanced analytics, guided programs and more (New & returning Premium users only. Must activate trial within 60-days of device activation. Content and features may change)
High & low heart rate notifications alert you if yours seems above or below your average
Battery lasts 6+ days—plus, fast charging gives you a full day’s charge in just 12 minutes (Varies with use and other factors; up to 12 hours with continuous GPS)
Use built-in GPS during runs, hikes, rides and more to see pace & distance without your phone
Use your voice with Amazon Alexa Built-in to check the weather, set reminders, control smart home appliances and more from your watch (Voice assistant availability and features may vary)
Small fits wrist 5.5″ – 7.1″ in circumference and Large fits wrist 7.1″ – 8.7″ in circumference
Customers say
Customers are satisfied with the watch’s quality. However, they report issues with functionality and charging. There are mixed opinions on sleep tracking, battery life, value for money, design, and fit.
9 reviews for Fitbit Sense Advanced Smartwatch with Tools for Heart Health, Stress Management & Skin Temperature Trends, Sage Grey/Silver, One Size (S & L Bands Included)


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Zoobadoo –
I like the original Fitbit Sense, So happy I was able to replace my first one
I like my Fitbit Sense. I like it a lot. I originally bought my first one in 2021. It worked very well. Then it stopped charging. I cleaned the contacts on the back of the watch. I tried several of my charging cords. It still wouldn’t charge. One of my kids suggested that I consider getting a new smart watch that’s made by a different company. I caved & purchased a new one since I thought my battery must have died in my watch. In the meantime, I also purchased a new charging cord for my old Fitbit Sense. It worked & my old Fitbit Sense charged perfectly. Uh oh! Lesson learned, thoroughly check all charging cords & charging blocks to device in question. Ugh!At that point, I then owned 2 fitness watches. I gave my daughter the old Fitbit Sense since it worked. My problem was that with the new competitioners fitness watch was that although it looked pretty cool, I really hated the app that was attached to it. I thought I would get used to it but I didn’t. I really hated it’s format which made the watch useless to me. It was more geared for an elite athlete, which I am not.My predicament was that I couldn’t take back my old watch from my child, especially after she already bought watch bands & accessories. Unfortunately I wasn’t going to keep the new watch. It was too expensive to have an app that didn’t work for me.After checking around where I could buy a Fitbit sense original, I was sad to see that Fitbit stopped making the original anymore. I really liked my old Fitbit sense. The upgraded Sense 2 has omitted some features that I liked on the original. Luckily when I looked on Amazon I found they some in stock & I was able to purchase a new Fitbit Sense. I really do like the Fitbit Sense. I think it’s a pretty good workhorse & I’m happy I found it. I know that in a near future it will be very difficult to find a new original one. I thought the price was pretty good. It was definitely less than the original one I owned previously. I wish there were some more features as far as watch faces but I’m pretty happy with it. I think it will last a long time. (fingers crossed) maybe when this one croaks, Fitbit/ Google will come up with another watch that includes all the features that I like.
JB –
Fitbit Sense
Being from the “older” generation I was a bit intimidated with no instructions to set it up. We don’t have internet so one more challenge. I must say it was pretty simple to setup with my android phone internet. It took a couple of hours but does everything I need it to. I especially needed the e c g feature. Only had 1 day but so far it’s great!!
Frank B. –
Poorly designed, lacking customer service.
Purchased this product as part of a $100 sale around black Friday, as it had some positive reviews. After using it for approximately two weeks, the frustrations became more than could be handled, so it was returned. Some of the issues are just cosmetic, but there are some serious functionality issues too.1) Limited customization options – when trying to customize the watch face, the options to do so are quite limited.2) The gray band isn’t as gray as you would think, it’s more brown/gray.3) Heart rate monitor is not accurate at all. While not doing anything it consistently shows my BPM as 75+, when I can manually count it as much closer to 55. The same goes during activity, as during my runs it shows my BPM as consistently being over 180.4) You need to keep the fitbit app open and running in the background on your phone if you want any of the apps to work on it, specifically the weather. This isn’t a major issue except that background apps like to drain your battery life, which iPhones aren’t exactly stellar about to begin with.5) The face has a rather slow response time, as it typically takes me about 4-5 taps to get it to recognize and turn on.6) The bluetooth connection is awful. I couldn’t be anymore than maybe 10 feet from my phone for it to stay connected, and sometimes that was even too far. I could have my phone in my pocket and it would randomly disconnect.I attempted to discuss the issues with FitBit themselves (specifically the bluetooth connection) but the customer service was lacking, with slow response times online (third conversation took almost an hour to get nowhere) or sometimes no response (first two conversations resulted in dropped follow-ups from FitBit). I had an older fitbit inspire which I lost a couple years ago, which was a much better device, so maybe the less technologically advanced versions are the way to go. Either way I wouldn’t buy another FitBit.
Debbie Lee Wesselmann –
Great Smartwatch With Emphasis on Fitness/Health
This Fitbit Sense smartwatch looks remarkably like the Apple Watch, both in design and in size, but of course it’s tooled to the Fitbit platform. I like that it reminds you when to get up and walk around to keep you from being too sedentary. Although it’s not entirely accurate with its step count — you can wave your hand around and get steps — it’s much more accurate than earlier Fitbit wrist-worn products. (I used to have a Fitbit One that I carried in my pocket because it was more accurate than the wrist Fitbits.) It’s easy to set up and use.This comes with a silicone band than can be easily swapped out for a mesh band from another company. I don’t mind the silicone band, but others may prefer a dressier, more formal look to hide the fact that they are wearing a Fitbit.– Debbie Lee Wesselmann
MOHAMMED HASAN –
Great price. Quick delivery.
Vasii Sebastian –
Recensione dopo qualche mese di utilizzo:Sono passato da un FitBit Ionic (che tra l’altro dovevo disattivare per una richiesta dalla casa madre dovuto ad un problema delle batterie).Esteticamente è molto gradevole alla vista, non è molto grosso perciò sul polso si presente bene e non si sente di averlo.Lo schermo è abbastanza grande e luminoso e l’assenza di pulsanti fisici non ne compromette l’utilizzo.La durata della batteria è ovviamente variabile però la tipologia di watchface che utilizzate può cambiare l’autonomia in modo drastico. a Parità di utilizzo ho trovato delle watchface che ti fanno durare la batteria per 2 giorni in più. Attualmente riesco ad arrivare a 5 giorni al massimo (con 2-3 allenamenti indoor no GPS) e notifiche che attivano lo schermo (disattivata attivazione schermo automatica). Per quanto riguarda la durata con GPS si riescono a fare anche 8 ore, forse 12 ma non ci sono mai arrivato.Ora passiamo ai contro:Il sistema di ricarica fa pena, fin dall’inizio ho avuto problemi a caricarlo immediatamente perché i pad del caricatore non aderiscono bene ai punti dell’orologio e quindi carica molto lentamente o per niente. Questo problema l’avevo anche con il Ionic (che ho cambiato in garanzia dopo quasi 2 anni per questo stesso motivo). Ormai ci ho fatto l’abitudine e controllo sempre se parte la carica (anche se sempre viene fuori l’avviso “ricarica lenta” ma in realtà carica normalmente).Mi è successo una volta che si riavviasse all’infinito senza possibilità di fermarlo. Ho dovuto resettarlo a Default con una procedura molto complessa. Si è riavviato a caso altre 2-3 volte ma senza farlo all’infinito.A volte la sincronizzazione non avviene e devo riavviare sia l’orologio che il telefono. Non so se dipende dal telefono o dal Fitbit perchè questo problema era presente sia con il vecchio telefono che con il vecchio FitBit Ionic.Il tracking delle attività è ottimo e anche la app ha tutto quello che serve. Peccato che lato sviluppo non ci investono molto (chissà se Google fare un upgrade massiccio).Presente l’EGC (l’ho acquistato per questa feature rara ma alla fine l’ho usata 2-3 volte).Presente anche la lettura della stanchezza con delle sessioni dedicate ma alcune funzioni sono a pagamento con la app FitBit Premium.Acquisterò di nuovo FitBit in futuro? Visti i problemi non lo so però anche con il Ionic non ero molto felice, dipende da voi se volete un compromesso tra affidabilità e funzionalità.
Amazon Customer –
I loved the watch, battery life is good and it has all the functionalities that I needed from a watch like steps, heart rate and sleeping information. Prior to this I had an apple watch and didn’t need all those functionalities.Unfortunately, the charger cable stopped working 20 days after I bought the watch. Tried to chase Amazon who directed me to fitbit website. Spoke to a customer service on the website who promised to send a replacement charger. After a day, received an email saying that they don’t have shipping services to UAE. I am really surprised with fitbit selling watches in a country that they don’t have service capabilities in.
Boboi –
A lot of complaints here, so I’ll give my OK-to-good experience countering some of the claims.Awful battery life – Don’t know where they’re coming from with that, but I have the charger handy outside the bathroom and I stick the watch there everytime I have a shower. That quick charge keeps the watch going until the next shower(or even the one after that if I so wish). And I use both Always-On(medium bright) and Sp02 tracking, power hungry features.Watch not as snappy, limited phone and app integration – Yeah it’s not really geared to be the smartest watch, nor does it aim to be. I have it relay notifications and control music, but nothing more than that. If you’re looking to organize agendas/calendars and play games, it’s a slippery slope down to stuttertown my friend. I use the watch for light sleep alarms and you can see the frame rates struggle with even the alarm app.Watch breaks easily – I’ve had it for about two weeks now, and after the initial TLC period I went about my routine without really being consciously gentle on the watch. A couple of hard knocks here and there, and the occasional running under the tap to rid of sweat. Watch is as good as the day it came out of the box.My biggest problem so far is the rash spots the watch leave with extended wear. They’re pretty small, and are manageable by alternating hands and positions on said hands(lower/upper wrist), but I feel that you shouldn’t have to do this every other day, especially when switching hands involves adjusting the watch sensitivity via the phone app. At least make it easier for me to change the dominant wrist setting on the watch itself.So. The good things? Fitness tracking. Data, and data trends over time. Data and trend based recommendations. Mindfulness and stress tracking. Sleep tracking. The ‘gamifying’ of fitness goals and stats. If you have all this stuff in mind when you buy the watch, you’re getting your money’s worth I guarantee it. You’ll need a sub to FitBit Premium(6 months’ of which come free with the watch), but that’s not the biggest bite out of the wallet from what I see, nor is the price unjustified(could always be less, but it’s okay atm).
Sajidrees –
Neat and clean, sealed box as listed delivered on time, reliable seller.Fitbit sense 1st gen, solid manufacture, band options not many, delivers great health data, if you need a good tracker this is the tool for you to stay on top of your game.