Winter SaleEnds 1/19. Limited quantities. No rainchecks.Shop now

Skip to contentGo to Product SearchGo to Footer
Main Content

Customer Ratings & Reviews

No content
  • Front. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Angle. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 1. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 3. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 4. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 5. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 6. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.
  • Alt View 11. Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black.

Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Black

Model:
FB401BK
SKU:
8390054
Highly rated by customers for:
Your price for this item is $31.99
Clearance
The comparable value price is $79.99

Customer reviews

Rating 4.4 out of 5 stars with 10464 reviews

Rating Filter

Pros mentioned filter

Cons mentioned filter

92%
would recommend
to a friend

Customers are saying

Customers are satisfied with the Flex Wireless Activity Tracker's sleep tracking, ease of use, and accurate step tracking capabilities. Many appreciate the long battery life, comfortable size and weight, and the motivational aspects of the device. While some users mentioned challenges with the charging mechanism, clasp, and price point, the positive feedback on core features outweighs these concerns. The water resistance and alarm features also received positive comments.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 298 Showing 5,941-5,960 of 10,464 reviews

  • Helps motivate you

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I like this product, and it really does help to motivate you. I hate the bracelet. Its very hard to snap shut, I would love to see them improve that option.

    I would recommend this to a friend

  • Easy to use

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Easy to use with phone app and link to my insurance reward program.

    This review is from Fitbit - Flex Wireless Activity and Sleep Wristband - Pink

    I would recommend this to a friend

  • Fit bit is awesome

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great product and I always get a good price from best buy.

    I would recommend this to a friend

  • Get stepping

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This was a gift to our daughter. She is out stepping us every day.

    This review is from Fitbit - Flex Wireless Activity and Sleep Wristband - Pink

    I would recommend this to a friend

  • Initial results look very good

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought this for my wife and she loves it! With the exception of the band breaking in the first week, (Best Buy replaced it with no issues), it has performed very well. She is seeing steady and consistent weight loss because of the Fitbit.

    I would recommend this to a friend

  • Amazing fitness tracker

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I love it and bought it for my whole family would highly recommend

    This review is from Fitbit - Flex Wireless Activity Tracker - Teal

    I would recommend this to a friend

  • Nice Fitbit

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Nice Fitbit! Was able to follow the instructions clearly for syncing

    This review is from Fitbit - Flex Wireless Activity and Sleep Wristband - Pink

    I would recommend this to a friend

  • very good

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very good device to show my health conditions and reasonable price.

    This review is from Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Slate

    I would recommend this to a friend

  • Good exercise tracker

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Tracks exercise well, uses GPS and gives you a monthly summary. If you like detail exercise tracking it is very good. it integrates with the iPhone music and the iPhone app is good. The app is not as intuitive as other similar apps. I don't like the food portion, it needs improvement hard to enter. And I think it gives you too much credit for calories burned.

    I would recommend this to a friend

  • Great

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    No problems, only wish I would've bought a darker colored wristband

    This review is from Fitbit - Flex Wireless Activity Tracker - Teal

    I would recommend this to a friend

  • Great to keep you moving

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This keeps me moving & tracking sleep, water consumption & calories

    This review is from Fitbit - Flex Wireless Activity Tracker - Teal

    I would recommend this to a friend

  • Great motivation to get out and exercise

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very fun item. I really enjoy being able to monitor my sleep cycle.

    This review is from Fitbit - Flex Wireless Activity Tracker - Teal

    I would recommend this to a friend

  • Good Start for healthy change

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I bought this to jumpstart my change in health patterns. It is great so far because it makes me pay attention to what my bad habits are. I like the alarm but it could notify me when I need to get up and walk. It doesn't irritate my arm.

    This review is from Fitbit - Flex Wireless Activity and Sleep Wristband - Pink

    I would recommend this to a friend

  • Great tracker

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Enjoy all features but do wish it would track sleep automatically

    I would recommend this to a friend

  • excellent my wife loves it

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Works well. Useful. Fun to use. Still trying to get the hang of it

    This review is from Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Slate

    I would recommend this to a friend

  • Love it

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It works great for me.I use it everyday.having fun with my friends

    This review is from Fitbit - Flex Wireless Activity and Sleep Tracker Wristband - Slate

    I would recommend this to a friend

  • Love the Fitbit!

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Still learning to use, but outstanding to track on's daily progress.

    I would recommend this to a friend

  • fitbit

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Love it. Really gets me moving. Don't even feel like I'm wearing it

    This review is from Fitbit - Flex Wireless Activity and Sleep Wristband - Pink

    I would recommend this to a friend

  • Good for teenagers

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Really enjoy the connection with my phone. Keeps me accountable.

    This review is from Fitbit - Flex Wireless Activity Tracker - Teal

    I would recommend this to a friend

  • Love it!

    |
    |
    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Really motivational in getting moving, eating right and getting fit.

    I would recommend this to a friend
Page 298, Showing 5,941-5,960 of 10,464 reviews
Sign in or Create Account

Get the latest deals and more.

Best Buy appLearn more
Share on YouTubeShare on InstagramShare on TikTokShare on FacebookShare on PinterestShare on X
Best Buy Canada
AccessibilityTerms & ConditionsPrivacyInterest-Based AdsState Privacy RightsHealth Data PrivacyDo Not Sell/Share My Personal InformationLimit Use of My Sensitive Personal InformationTargeted Advertising Opt OutCA Supply Chain Transparency Act
In-store pricing may vary. Prices and offers are subject to change. © 2026 Best Buy. All rights reserved. BEST BUY, the BEST BUY logo, the tag design, and MY BEST BUY are trademarks of Best Buy and its affiliated companies.