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 469 Showing 9,361-9,380 of 10,464 reviews

  • Great gift !

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

    Purchased this for my mom and she wears it everyday and loves it !!

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

    I would recommend this to a friend

  • Good

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

    The matched the lowest price out there hassle free buying I was impressed

    I would recommend this to a friend

  • Perfect

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

    Great product, no major complaints. More colors or sports team colors would be nice.

    I would recommend this to a friend

  • Excellent product!

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

    Love my fitbit! Reminds me to keep moving and vibrates/lights up when I reach my goal.

    I would recommend this to a friend

  • Great for our teen with dysautonomia.

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

    Our teen can now see how much she is or isn't doing. I don't have to nag.

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

    I would recommend this to a friend

  • Great device

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

    Very practical and durable. I love my Fitbit and wear it all the time.

    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.

    Really like the Fitbit! I do wish the Force could be put in water as I use the pool.

    I would recommend this to a friend

  • Great for acountability for fitness and health

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

    Great device for use for fitness, sleep evaluation and overall health accountability!

    I would recommend this to a friend

  • love fitbit

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

    Love the fitbit did lots of research before my purchase. This is a great tracker.

    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.

    It works great. Have to charge battery too often. Wish the battery lasted longer

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

    I would recommend this to a friend

  • it really is helpful

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

    I am on a diet at this time, The info I receive tell me if I am on tract.

    I would recommend this to a friend

  • Easy to use and fair price for it!

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

    I like the product and I would recommend it! It could be more accurate as it really does not count your steps but how your arms swing as you walk. It is fair to get an idea but not accurate as to how far you actually stepped off a distance.

    I would recommend this to a friend

  • Good unit

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

    Nice unit, good option for the cheaper price. seems to hold up well.

    No, I would not recommend this to a friend

  • Great

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

    It really works and doesn't give me any problems I would recommend it to people

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

    I would recommend this to a friend

  • Fun to Use

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

    This is a device I would recommend to my friends. It tracks well and feels good on.

    I would recommend this to a friend

  • Enjoyed it, until it died after only 7 weeks.

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

    Purchased on July 10 and it's dead and no longer charging as of August 30. Very disappointing for an otherwise well-loved brand. The wristband can be frustrating to secure at first, but eventually it breaks in and gets easier. The alarm was my favorite feature, as it wakes me and not my potentially sleeping infants. Not sure what I'll do at this point, didn't think it would be a dud product. Very disappointed.

    No, I would not recommend this to a friend

  • very easy to use

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

    if all you want is a fit bit and not a watch this is the one you need

    I would recommend this to a friend

  • Very fun to see movement through your day

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

    I love it. We all have one on our family. We love cheering each other's successes.

    I would recommend this to a friend

  • Great

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

    Great product reminds me to keep moving and keep track of my calories

    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.

    I got one as a gift and love it, so I bought this as a gift for a friend

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

    I would recommend this to a friend
Page 469, Showing 9,361-9,380 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.