

⌚ Elevate your health game with Fitbit Sense 2 — where wellness meets smart style!
The Fitbit Sense 2 is a cutting-edge health and fitness smartwatch featuring continuous heart rate monitoring, ECG app for atrial fibrillation detection, SpO2 tracking, and built-in GPS. It offers advanced stress management tools, personalized sleep insights, and over 40 exercise modes. With a sleek design, water resistance up to 50 meters, Bluetooth connectivity for calls and notifications, and a 6+ day battery life with rapid charging, it’s engineered for seamless all-day wear. Includes both small and large bands plus a 6-month Fitbit Premium trial for deeper health analytics.

















| ASIN | B0B4MV1TGL |
| ASIN | B0B4MV1TGL |
| Additional Features | Sleep Monitor, Stress Monitor, Sleep Monitor, ECG, Oxymeter (SpO2), Heart Rate Monitor, GPS, Time Display, Notifications, Water Resistant |
| Age Range Description | Adult |
| Band Color | Blue |
| Band Material Type | Silicone |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Battery Average Life | 6 days |
| Battery Capacity | 162 Milliamp Hours |
| Battery Cell Type | Lithium Ion |
| Battery Charge Time | 12 minutes |
| Best Sellers Rank | #863 in Electronics ( See Top 100 in Electronics ) #20 in Smartwatches |
| Brand | Fitbit |
| Built-In Media | Watch Band |
| Case Material Type | Aluminum |
| Color | Blue Mist/Pale Gold |
| Communication Feature | [PARTIAL] Bluetooth for call and message alerts |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Wide range of smartphones |
| Connectivity Technology | Bluetooth |
| Controller Type | Android |
| Customer Reviews | 4.1 4.1 out of 5 stars (9,690) |
| Date First Available | September 23, 2022 |
| Department | mens |
| Display Type | AMOLED or OLED |
| GPS Geotagging Functionality | Built-in GPS |
| Human Interface Input | Touchscreen |
| Item Dimensions | 1.57 x 0.47 x 1.57 inches |
| Item Weight | 1.3 Ounces |
| Item model number | FB521GLBM-US |
| Manufacturer | Fitbit Inc |
| Manufacturer | Fitbit Inc |
| Memory Storage Capacity | 4 GB |
| Metrics Measured | [Multiple] |
| Model Name | Fitbit Sense 2 |
| Model Number | FB521GLBM-US |
| Operating System | Android |
| Product Dimensions | 1.57 x 0.47 x 1.57 inches; 1.3 ounces |
| Resolution | 348 x 348 |
| Screen Size | 1.58 Inches |
| Shape | Square |
| Sim Card Size | eSIM |
| Sport Type | Fitness |
| Style Name | Modern |
| Supported Application | GPS, Phone, Voice Assistant |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adult |
| UPC | 810073611436 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 year manufacturer |
| Warranty Type | Limited |
| Water Resistance Depth | 164 Feet |
| Water Resistance Level | Water Resistant |
| Waterproof Rating | [IPX4 or better] |
| Wearable Computer Type | Smart Watch |
| Wireless Compability | Bluetooth |
| Wireless Provider | Unlocked |
J**.
Easy to customize the app and watch to my needs
I purchased this watch primarily for its continuous heart monitoring, ECG app, sleep monitoring, plus some basic fitness like steps and stairs. It was easy to install. I was pleased to be able to turn off the GPS and Alexa which may have been good for an extra day of battery life. I was able to turn off the fitness nags. I've been running and working out over 40 years and don't need nags. I was also able to skip the Premium service since I don't want a monthly bill and don't want other nagging. There are a huge number of watch faces available. I focused only on free watch faces. One thing that wasn't clear is that apparently you can only install 6 faces on the watch. When I found a better choice, it wouldn't install and had no useful explanation of why not. I ended up looking specifically for watch faces that included a battery indicator (surprisingly not universal!) and basic fitness figures. The hard part was finding watch faces that increased the font size of the battery % and fitness figures so they were more easily legible to older eyes. The biggest problem is with the watch band. I have a narrow wrist and bands with holes like the OEM band are never spaced in a way that fits well. So I ordered a new band that is metal mesh and uses a clamp to fix the length. That works to get a comfortable fit, but is a pain to put on. Good thing I only take the watch off once a day! So I tried another watch band that had a folding clasp, like my old watch band, and is adjusted in length by removing links. The whole process of removing links was a serious pain, requiring a magnifying ring light and great patience. And the link removal did not yield a snug and comfortable fit, just as with the OEM watch band. Back to the band that works, for now. Update. I just discovered it is possible, apparently, to get an adapter from my old watch band that attaches to the watch with pins to the FitBit clamp system. I'm hoping that will allow me to use my old watch band which was excellent. Further update: https://www.amazon.com/dp/B0BN1RVM5W?psc=1&ref=ppx_yo2ov_dt_b_product_details This adapter took a long time to arrive all the way from China, but it worked perfectly. My old watch band was a 20mm band with adjustable sizing clamp and a folding clasp to take it on and off: https://www.amazon.com/gp/product/B08CY5D2LB/ref=pe_2313400_740551120_em_1p_0_lm?th=1 Now I have the best of all worlds. A good watch and it is easy to put on and take off with a snug fit. I wonder why no one seems to make this style of watch band specifically to fit the FitBit?
K**A
Works for me
Good smart watch, still trying to understand why it does some strange things, like counts steps while I’m sleeping. But all in all it’s fills my needs.
F**R
Best Fitbit Ever!
This is my fifth Fitbit watch and by far the best. It's slim and light weight and I hardly notice I'm wearing it. The display is easy to read and there's a large assortment of watch faces available. I especially like the two-hour heart display instead of just the heart rate, and it's convenient to have the weather on my wrist. I only gave it 4 stars because of the band, which absolutely sucks. Where it tucks back in, it pinches my skin. I purchased a replacement band, the typical clasp type and it's much, much better. Also, the battery lasts 3-4 days before it needs to be recharged, but it recharges quickly. All-in-all, this is a great product, well worth its price.
A**E
Beautiful Tracker, Great Features, No Problems Using in the Pool
Update to my previous review: Leaving at 5 stars for quality, durability, and features. Battery life seems to be about the same as my old Fitbit HR. Initially, I got about 5 days out of the first couple of charges. Now I'm getting about 3-4. I have no problem with that. I charge my phone more often so I don't know why I would expect more from my fitness device. How quickly the battery drains seems to be dependent on my level of activity. I just check every day to see how much it's drained so I don't get caught out with a dead battery. Haven't allowed it to go less than 20%. It does not track steps accurately when I do pool exercises. I manually calculated about 2400 steps during my pool therapy and the tracker only counted a bit over 1900, including steps walking to and from the pool and so forth. All total, there should have been closer to 3000 steps so that's a pretty big disparity. Frankly, I have not found any fitness tracker to be very accurate with step count during exercise as it depends on how much arm swing is involved. Previous Review: Received my Fitbit Sense 2 (Mist blue and light gold) a few days ago and I love almost everything about this fitness tracker. The mist blue color is a pale blue-grey. The watch casing is a soft gold color like you might see on a car. It matches the seller's photo perfectly (on my PC monitor anyway.) I think it's very pretty, albeit larger than I like in a watch. I have tiny wrists and large watch bands/faces are awkward on me. But, to get the features I wanted, it's worth getting used to. I don't care for silicone bands as they don't breathe but I suppose for a sport watch, it might be the best option. The buckling system was concerning for me because you have to pop the band hole over a pin, then tuck it under on the other side against your wrist. It looked like it would be uncomfortable to clasp it and wear, but I'm happy to say it's not. Just feels a bit weird to me because it's bulky for my wrist size. It was relatively easy to set up. The only difficulty I had was when I logged into my Fitbit app previously associated with my Fitbit Charge HR, it kept asking me to log into my account, but I was already logged in. When I entered my password, it said it was incorrect but it wasn't. I finally tried using my email PW and got into my account. What was confusing was, the Fitbit logo was at the top next to, "log into your account." So, buyer be aware, if you have to log into an existing Fitbit account, they want your email address/PW, not Fitbit PW. The biggest reason I chose this model was for water use. I have to do pool therapy and wanted all my steps and activities to be logged in real-time. I wore it in the pool, hot tub, and shower today and there were no problems with it at all. Just be sure to read all the instructions carefully. You can get more info on the Fitbit website for details on setup, use, and care. The device only came with quick setup instructions in the box. I haven't really paid much attention to the sleep tracking as I have a sleep number bed that tracks that. And I haven't compared it against another heart rate monitor. However, based on the level of activity and how I felt during pool walking and exercises, it seemed like the numbers were relatively accurate. My favorite feature is the hourly buzz to get moving. It not only buzzes on my wrist to alert me it's time to move, but after I get up and walk around, it buzzes again to let me know I've completed 250 steps (based on my current setup.) This feature is priceless as I sit at a PC all day and forget to move. Overall, 3 days in, I'm very happy with this purchase and feel that the price was fair compared to similar devices with the same features. It also came with 6 months of free premium app services which I appreciate because it gives me a good amount of time to decide if I want to continue with the premium for a monthly fee. I do not find that app either intuitive or user-friendly and it will take some time for me to get the hang of using it. Should I run into any problems with my Sense 2 in the future I'll update this review.
J**N
This is a great product. We are very familiar with it, and it works smoothly with the existing Fitbit app on our phones.
M**N
Lo busqué en varias tiendas y aquí fue la mejor opción de compra además segura.
T**N
Just great
Z**A
Good product . Switched from Apple Watch 8 ( which crashed after 2 yrs of use) and find this so superior in terms of battery life. Features are almost same but this is a improved version for a better price
G**H
Fitbit Sense 2 is an excellent product, will sure recommend, i am using this for almost an year and really happy with the purchase.
Trustpilot
2 weeks ago
1 month ago