Fitbit Flex 2

Last updated date: March 29, 2019

DWYM Score
7.9

Why Trust The DWYM Score?

DWYM is your trusted product review source. Along with our in-house experts, our team analyzes thousands of product reviews from the most trusted websites. We then create one easy-to-understand score. Learn more.

Look for the DWYM seal for products that are the best in the category.

We looked at the top 1 Fitness Trackers and dug through the reviews from 9 of the most popular review sites including New York Times Wirecutter, BestReviews, CNET, Tech Radar, Trusted Reviews, PG Magazine - SE Asia, Digital Trends, Wearable, Expert Reviews - UK and more. Through this analysis, we've determined the best Fitness Tracker you should buy.

Overall Take

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. In our analysis of 123 expert reviews, the Fitbit Fitbit Flex 2 placed 5th when we looked at the top 13 products in the category. For the full ranking, see below.

Editor's Note May 15, 2019:
Checkout The Best Fitness Tracker for a detailed review of all the top fitness trackers.

Expert Summarized Score
7.5
9 expert reviews
User Summarized Score
7.4
4,437 user reviews
Our Favorite Video Reviews
What experts 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.
- New York Times Wirecutter
A basic fitness monitor with a thin, sleek design. We love that it is waterproof and can be worn while swimming.
- BestReviews
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.
- CNET
September 29, 2016 | Full review
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.
- Tech Radar
February 15, 2018 | Full review
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.
- Trusted Reviews
June 13, 2018 | Full review
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.
- PG Magazine - SE Asia
September 29, 2016 | Full review
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
- Digital Trends
December 12, 2016 | Full review
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.
- Wearable
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.
- Expert Reviews - UK
December 11, 2018 | Full review
What experts 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.
- New York Times Wirecutter
It doesn't track heart rate or have a screen. Battery life isn't as long as that of other models we considered.
- BestReviews
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.
- CNET
September 29, 2016 | Full review
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.
- Tech Radar
February 15, 2018 | Full review
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.
- Trusted Reviews
June 13, 2018 | Full review
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.
- PG Magazine - SE Asia
September 29, 2016 | Full review
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.
- Digital Trends
December 12, 2016 | Full review
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.
- Wearable
No GPS or heart-rate monitoring
- Expert Reviews - UK
December 11, 2018 | Full review

From The Manufacturer

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

Overall Product Rankings

1. Fitbit Versa
Overall Score: 8.8
Expert Reviews: 10
2. Lintelek Activity Tracker
Overall Score: 8.4
Expert Reviews: 2
3. Garmin vívoactive 3
Overall Score: 8.0
Expert Reviews: 11
4. Fitbit Charge 3
Overall Score: 8.0
Expert Reviews: 6
5. Fitbit Flex 2
Overall Score: 7.9
Expert Reviews: 9
6. Samsung Pro Fitness Band
Overall Score: 7.8
Expert Reviews: 8
7. Garmin Vívosmart 4
Overall Score: 7.7
Expert Reviews: 15
8. FitBit Zip
Overall Score: 7.7
Expert Reviews: 9
9. Garmin vívosport Fitness Tracker
Overall Score: 7.7
Expert Reviews: 10
10. FitBit Surge
Overall Score: 7.5
Expert Reviews: 10
11. Fitbit Alta
Overall Score: 7.5
Expert Reviews: 6
12. Withings Go Activity Tracker
Overall Score: 7.0
Expert Reviews: 10
13. Garmin vivofit 3 Fitness Tracker
Overall Score: 7.0
Expert Reviews: 8

An Overview On Fitness Trackers

Fitness trackers are truly the must-have accessory for a healthy lifestyle. It’s no surprise either. These handy devices offer a wealth of health knowledge right at your fingertips — or, more accurately on your wrist. Armed with the right fitness tracker, you can record and analyze your way to the healthiest you yet. If you haven’t tried them yet, prepare to be amazed and converted.

Wearable tools can be just as important as the recipes, nutrition and fitness accessories in your arsenal. Together, they help you achieve your goals and understand exactly when you’ve done that. Fitness trackers are like mini-supercomputers right on your wrist. They record and monitor movement and fitness-related activities. They track the number of steps taken, distance walked, sleep duration and quality, heart rate and more.

While the category started simple and basic, they have become very advanced over the years. There are separate modes that enable them to track specific types of exercise and can distinguish between swimming, running and cycling, as well as keep logs of your favorite routes. No matter what model you have, you can connect and upload all the stored data to your computer or smartphone to analyze and learn from your activities.

It’s not a passing trend either. In fact, the global fitness trackers market clocked in at just under $18 billion in 2016. That value is expected to grow to more than $62 billion within the next four years. Smartwatches, specifically, are driving most of the predicted growth. Some of the leading fitness tracker manufacturers include Fitbit, Samsung, Nike, Adidas, Google and Apple. Some lesser-known manufacturers, like Lintelek, have also launched products in the fitness tracker category. In fact, the budget-friendly Lintelek Activity Tracker is the only non-Fitbit to make the list of recommended devices.

Fitbit, which has two of the four top picks on this list, is one of the most popular fitness tracker manufacturers. The company launched its very first tracker back in 2007 and continues to lead the category with innovative new technology and features.

Now, Fitbit, Apple, Garmin and more offer a wide variety of different fitness trackers and smartwatch models from affordable to splurge prices. There are high-tech models with detailed data tracking for serious athletes, as well as simple watches for those just dipping their toe into fitness tracking and data. There are also fitness trackers made for children ages eight and up, meant to encourage movement and healthy habits early. Whether you’re trying to make fitness fun for youngsters or start your own health challenge,  there is a Fitness tracker for everyone and every goal.

Fitness trackers are designed to seamlessly track every part of your day — including activity, exercise, food, weight and sleep. That can be a bit overwhelming. However, Fitbit says they will “help you find your fit, stay motivated and see how small steps make a big impact.”

They monitor heart rate with PurePulse. The newest watches, like Fitbit Charge 3, Fitbit Versa and Fitbit Ionic, include SmartTrack. This innovative technology automatically senses different types of exercises and records them accordingly in the Fitbit app. For example, if you hop on a spin bike and start pedaling, the watch will begin recording as a cycling activity.

The current Fitbit smartwatches, like Fitbit Versa, also incorporate apps and features like wallet-free payments, calendar alerts and text message updates. Today’s Fitbits and fitness trackers are so much more than step counters. They also enhance and simplify many everyday tasks.

In addition to encouraging healthy lifestyles, Fitbit, and other fitness tracker apps connect all users in a like-minded community. In the apps, you can share your goals and find motivation from people around the world. It also opens up the opportunity for fun competitions with friends, family or coworkers. You can compare on a variety of statistics to push yourself farther and hit goals faster.

All those tracker insights add up to real lifestyle changes. In fact, researchers from Arizona State University discovered that the combination of wearing a Fitbit Zip activity monitor and expressing more mindfulness throughout the week increased levels of physical activity. For a relatively low cost (most models range from $50 to $250), fitness trackers help motivate you to kickstart and stick with a fitness plan, hold you accountable, encourage goal setting and, best of all, help you lose weight.

Pick the right fitness tracker, and you’re well on your way to living your healthiest life and achieving goals you haven’t even dreamed of yet.

DYWM Fun Fact

The very first fitness trackers date back to Renaissance times. Yes, really. Leonardo Da Vinci sketched what looked like an early version of a pedometer. Then, in 1788, Thomas Jefferson introduced the first pedometer in the U.S. Pedometers are basic devices used to track the number of steps taken.  Historians believe his inspiration for the device could have come from the motion sensor of the Swiss or French watches.

It took a few hundred years more before pioneers developed high-tech trackers. Fitbit founders Eric Friedman and James Park recognized the potential of wireless technology in the fitness industry. With the first product, they “embarked on a journey to create a wearable product that would change the way we move.” Suffice it to say, they succeeded and went on to realize that potential and then some. More than 10 years later, both original founders still lead Fitbit and continue to introduce new and innovative fitness technology each year.

The Fitness Tracker Buying Guide

  • Fitness trackers range in price depending on included features. Some cost under $100 while others fall under $250. The more advanced the tracking features, the higher the price points.
  • Fitness trackers and smartwatches run on rechargeable batteries. When drained, they require re-charging by plugging into power sources or outlets.
  • The battery life of different trackers varies based on the activities tracked, but some can last up to five days between charges.
  • Fitness trackers use special sensors to monitor and record vital health stats throughout your day. Some of the info recorded includes activity, heart rate, food, weight and sleep. The more advanced models incorporate a built-in GPS for improved accuracy and ease of use.
  • The models with GPS can also produce and follow maps of specific routes, making workouts more streamlined wherever you are.
  • Fitness trackers, including Fitbits, Garmin, Lintelek and more, often come with an app that connects the device and information recorded on your phone or tablet. Some also bring users in a global online community together to connect, compete and learn from each other.
  • The fitness trackers sync data to your computer or smartphone so that you can access additional analysis and progress reports.
  • Many fitness trackers feature water resistant and waterproof components, so they can be worn in rain and while swimming without worrying. Make sure your model has this capability if that’s an important feature to you.