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 464 Showing 9,261-9,280 of 10,464 reviews

  • Amazing product. Recommend it to everyone!

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

    Love this product got it to help hold me accountable and keep me off my bum. Love it!! It works.

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

    I would recommend this to a friend

  • New, and innovative.

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

    Love this product. It has helped me achieve new goals!

    I would recommend this to a friend

  • good for motivation

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

    Would reccomed to everyone who wants to stay fit..

    I would recommend this to a friend

  • like it

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

    I like it. I wish that there were more colors. !!!

    I would recommend this to a friend

  • LOVE my Fitbit

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

    I love my fitbit. I wear it all the time and I rely on it to help keep me on track of my health.

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

    I would recommend this to a friend

  • Awesome product

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

    I live my fit bit. I wear it all of the time. Definitely got my money worth.

    I would recommend this to a friend

  • Excellent pedometer for active person

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

    Requires a lot of input on the app side, but the step count and sleep monitoring is stellar

    I would recommend this to a friend
  • Cons mentioned:
    Display

    Too basic, No data available until synced on phone

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

    I was expecting to be able to at least see the total number of steps on the fitbit flex screen and time...Disappointed it just displays "dots".

    No, I would not recommend this to a friend

  • I did not like the plastic band

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

    the plastic ban got very hot when walking out side.

    I would recommend this to a friend

  • Easy to use.

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

    it does what it says it will do. Just keep it charged.

    I would recommend this to a friend

  • Seems limited.

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

    I'm never sure if I've activated the sleep monitor.

    I would recommend this to a friend

  • Didn't like the display. Not accurate

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

    Replaced it for a fitbit one. Like display better.

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

    I would recommend this to a friend

  • Very helpful!

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

    I love keeping track of my health habits. This is so simple to use with your phone.

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

    I would recommend this to a friend

  • Worked perfectly

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

    Works perfectly. Got this as a gift and it's exactly what I was looking for.

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

    I would recommend this to a friend

  • Wife loved it

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

    Wife wanted it for mother's day to help motivate her to exercise and monitor sleep

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

    I would recommend this to a friend

  • Inspired to walk more

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

    Love the fitbit and how it's helped me get healthier. Inspired to get my steps in everyday.

    I would recommend this to a friend

  • good product

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

    good product but i did not like the color of the band

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

    I would recommend this to a friend

  • Not Great

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

    Bought for my wife as a gift and she could not get it to sync with computer. We brought back to BB and she went with the Samsung and it worked flawlessly.

    No, I would not recommend this to a friend

  • Great product

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

    This is an awesome product for anybody at any age.

    I would recommend this to a friend

  • Does the job

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

    Device works great, purchased it for friend with a pendant that holds the Fitbit.

    I would recommend this to a friend
Page 464, Showing 9,261-9,280 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.