Fitbit Flex 2 LED Lights Fitness Tracker

Last updated: October 13, 2023

This budget-friendly Fitbit packs helpful information into a sleek band. An excellent starter fitness tracker, it records steps, distance, calories burned and active minutes. Since it doesn't include a heart rate sensor or built-in GPS, it can only provide a limited amount of stats. However, it does have waterproof features.

Fitbit Flex 2 LED Lights Fitness Tracker

We looked at the top Fitness Trackers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Fitness Tracker you should buy.

Product Details

In our analysis of 64 expert reviews, the Fitbit Flex 2 LED Lights Fitness Tracker placed 8th when we looked at the top 11 products in the category. For the full ranking, see below.

From The Manufacturer

Fitbit flex 2, black, track steps, distance, calories burned and active minutes. Comes with both small and large size band.

Our Expert Consultant

Stephanie Mansour   
Certified Personal Trainer, Health and Wellness Expert

Stephanie Mansour, host of “Step It Up with Steph” on public broadcasting, has been coaching women for over a decade on how to lose weight and make it last. She has a Bachelor of Arts in communications with an emphasis on women’s studies and psychology from the University of Michigan. She holds certifications in life coaching, personal training, yoga and Pilates.

Expert Reviews

What reviewers liked

Like the Charge 3, the very affordable Fitbit Flex 2 tracks your movement automatically, and it does a pretty good job of recognizing and measuring activities.
A basic fitness monitor with a thin, sleek design. We love that it is waterproof and can be worn while swimming.
The Flex 2 is the first Fitbit you can wear in the shower and while swimming. It's waterproof down to 50 meters (about 165 feet) and can be used in both fresh water and salt water.
The Fitbit Flex 2 is a skinny, slight, water resistant fitness tracker, small enough that you can wear a watch alongside it without looking like you’re wearing two timepieces.
Once you have the Flex 2 wrapped around your wrist, its strength lies in the fact that you can largely forget about it. All of your steps are automatically counted and your forty winks all add up when you sleep.
The Fitbit Flex 2 is fully waterproof—a first for Fitbit. It can be used 150ft underwater for several hours and automatically tracks swimming stats, including lap counts, pace, and total duration.
The Flex 2 is Fitbit’s first truly waterproof device, and can give you a rough idea of how many laps, yards, or even miles you swim
The wearable is much slimmer in appearance than the first Flex because the tracking module is 30% smaller. The Alta looks like a beast next to it.
Fitbit’s Flex 2 is well rounded, with the waterproofing paired with some welcome added extras such as keeping track of how many (or how few) lengths you just swam in your local pool.

What reviewers didn't like

It lacks a heart-rate monitor, which means that the sleep data you get is rudimentary—just how long you slept, not how deeply.
It doesn't track heart rate or have a screen. Battery life isn't as long as that of other models we considered.
Charging is also annoying: The Flex 2 comes with yet another proprietary and totally different charger from every other Fitbit. You have to remove the tracker, which is an extremely tiny little stick, and insert it into a small dock. A full charge will take up to 2 hours.
If this is your bag, there’s just one other thing to consider - the Fitbit Flex 2’s battery life is not that good for such a low-functionality tracker.
Part of the issue is that there’s no loop through which to thread the strap, meaning you have to line up the buttons with the holes; it’s trickier than you might think especially for anyone with restricted motor control.
There's also no display; instead, there's a row of colorful lights that blink to indicate your progress and alert you of notifications from your phone.
Fitbit says that the swimming issue can crop up because for the Flex 2 to recognize the activity, you need to have the swimming auto tracking setting activated.
It's not quite straightforward when you feel a vibrating buzz at the wrist and see a colour flash up to signal that someone is trying to get in touch. Bottom line, you're still going to be looking for your phone to deal with the notification.
No GPS or heart-rate monitoring
View our Fitness Tracker buying guide for in-depth advice and recommendations.

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