How Accurate Is The Fitbit Flex 2

Mobile Accessories

Welcome to our comprehensive guide on the Fitbit Flex 2! In this article, we will delve into the accuracy of this popular fitness tracker and explore its various features. The Fitbit Flex 2 has garnered attention for its sleek design, waterproof capabilities, and the ability to track your fitness activities throughout the day. But just how accurate is it when it comes to monitoring your steps, sleep, and other metrics? We will provide you with an in-depth analysis backed by real-life user experiences and expert opinions. Whether you’re considering purchasing the Fitbit Flex 2 or simply curious about its accuracy, we have all the information you need. So, without further ado, let’s dive in and find out how accurate the Fitbit Flex 2 really is!

Inside This Article

  1. What is the Fitbit Flex 2?
  2. Accuracy of Step Tracking
  3. Accuracy of Sleep Tracking
  4. Accuracy of Swim Tracking
  5. Conclusion
  6. FAQs

What is the Fitbit Flex 2?

The Fitbit Flex 2 is a popular fitness tracker developed by Fitbit, a leading brand in the health and wearable technology industry. It is designed to monitor your daily activities, including steps taken, distance traveled, calories burned, and quality of sleep. One of the standout features of the Fitbit Flex 2 is its sleek and minimalist design, making it both stylish and comfortable to wear.

With its durable and swim-proof construction, the Fitbit Flex 2 is perfect for those who lead an active lifestyle, allowing you to track your exercises even in the pool. It utilizes advanced sensors and algorithms to precisely track your movements and provide accurate data on your fitness progress.

The Fitbit Flex 2 comes with a variety of features and functions to help you meet your health and fitness goals. It has a silent alarm that can gently wake you up in the morning without disturbing your partner. It also sends you reminders to move if you’ve been sitting for too long, encouraging you to stay active throughout the day.

Additionally, the Fitbit Flex 2 supports wireless syncing, allowing you to easily connect it to your smartphone or computer and view your progress in real-time. You can also access the Fitbit app, which provides in-depth insights, personalized recommendations, and the ability to track your food and hydration intake.

Whether you’re a fitness enthusiast or just starting your health journey, the Fitbit Flex 2 is a reliable and versatile fitness tracker that can assist you in reaching your wellness goals. With its accurate tracking capabilities and smart features, it is a valuable companion for monitoring your daily activities and making positive lifestyle changes.

Accuracy of Step Tracking

When it comes to tracking your daily steps, the Fitbit Flex 2 does a remarkable job at providing accurate results. Thanks to its advanced accelerometer technology, this sleek and compact fitness tracker can accurately count your steps throughout the day.

Whether you’re running, walking, or engaging in other forms of physical activity, the Fitbit Flex 2 recognizes your movements and translates them into step counts. This is particularly beneficial for individuals who rely on step tracking to reach their fitness goals or monitor their daily activity levels.

Fitbit’s proprietary algorithm ensures that the step tracking accuracy of the Flex 2 remains consistent and reliable. Whether you’re walking on a flat surface or climbing a flight of stairs, you can trust that the Fitbit Flex 2 will capture each step with precision.

Unlike some other fitness trackers that can be prone to counting false steps or missing out on actual steps, the Fitbit Flex 2 has shown to minimize these errors. This means that you can have confidence in the step counts recorded by your Fitbit Flex 2 throughout the day.

Keep in mind that the accurate step tracking of the Fitbit Flex 2 is not only limited to walking and running activities. It can also effectively track steps during other physical exercises such as aerobics, dancing, or even weightlifting sessions.

Furthermore, the Fitbit Flex 2 allows you to set personalized step goals, giving you the perfect motivation to stay active and reach new milestones. The accurate step tracking provided by the Fitbit Flex 2 ensures that you can monitor and celebrate your progress with confidence.

Accuracy of Sleep Tracking

One of the key features of the Fitbit Flex 2 is its ability to track your sleep. But how accurate is this feature? Let’s take a closer look.

The Fitbit Flex 2 uses a combination of movement sensors and heart rate monitoring to track your sleep patterns. When you go to bed, the device automatically detects when you fall asleep and records the duration and quality of your sleep throughout the night.

While the Fitbit Flex 2 provides a good overview of your sleep patterns, it’s important to note that it may not be 100% accurate in tracking the exact stages of your sleep, such as deep sleep or REM sleep.

There are several factors that can affect the accuracy of sleep tracking, such as the Fitbit device placement on your wrist and your individual sleep habits. For example, if you sleep with your arm under your pillow or if you have a restless sleep, it may affect the accuracy of the sleep tracking results.

However, despite these limitations, the Fitbit Flex 2 can still provide valuable insights into your overall sleep patterns and help you identify trends over time. By reviewing the sleep data recorded by the device, you can make adjustments to your sleep routine and improve your sleep quality.

It’s also worth noting that while the Fitbit Flex 2 can track your sleep, it does not provide personalized sleep coaching or recommendations. If you are experiencing chronic sleep issues, it’s important to consult with a healthcare professional for a comprehensive evaluation and guidance.

Accuracy of Swim Tracking

When it comes to tracking your swimming workouts, the accuracy of the Fitbit Flex 2 is surprisingly impressive. Designed to be water-resistant up to 50 meters, this fitness tracker is equipped with a swim tracking feature that allows you to monitor your swim sessions with ease.

One of the key factors that contribute to the accuracy of the Fitbit Flex 2 in swim tracking is its ability to recognize different swim strokes. Whether you’re doing freestyle, breaststroke, backstroke, or butterfly, the Fitbit Flex 2 can accurately detect and record your activity.

Additionally, the Fitbit Flex 2 takes into account the number of laps you swim. By using its advanced algorithms, it can accurately count your laps, ensuring that you have a clear understanding of your swim distance and intensity.

Furthermore, the Fitbit Flex 2 provides real-time feedback on metrics such as swim duration and calories burned. This allows you to track your progress and make adjustments to your swimming routine accordingly.

It’s important to note that the accuracy of swim tracking can vary depending on factors such as stroke technique and swim intensity. While the Fitbit Flex 2 does an excellent job overall, it is always a good idea to verify the data against your own perception and compare it with other tracking methods, such as using a dedicated swim watch or counting laps manually.


The Fitbit Flex 2 is a highly accurate fitness tracker designed to help you monitor your daily activity levels and reach your fitness goals. With its advanced technology and sleek design, it offers a seamless and convenient way to track your steps, distance, calories burned, and even your sleep patterns.

Whether you’re an active individual looking to improve your fitness or someone who simply wants to stay mindful of their daily activity, the Fitbit Flex 2 provides reliable and accurate data to help you stay on track. The device’s precision in monitoring your movements ensures that you get the most accurate information about your daily activity levels, allowing you to make informed decisions about your health and well-being.

Moreover, the Fitbit Flex 2 offers a range of mobile accessories that enhance its functionality and convenience. From interchangeable bands to wireless syncing capabilities, these accessories make it even easier to incorporate the Fitbit Flex 2 into your daily routine.

In conclusion, the Fitbit Flex 2 is a reliable and accurate fitness tracker that can help you achieve and maintain your fitness goals. With its advanced technology and range of mobile accessories, it offers a seamless and convenient way to monitor your activity levels and take control of your health and well-being.


1. How accurate is the Fitbit Flex 2?
The Fitbit Flex 2 is known for its accuracy in tracking various metrics such as steps taken, distance traveled, and calories burned. It uses advanced sensors and algorithms to provide accurate measurements. However, it’s important to note that no fitness tracker is 100% precise, and there may be slight discrepancies between the Fitbit Flex 2’s readings and actual values. Nevertheless, Fitbit devices are generally considered to be among the most reliable and accurate fitness trackers in the market.

2. Can I swim with the Fitbit Flex 2?
Absolutely! One of the key features of the Fitbit Flex 2 is its water-resistant design, allowing you to wear it while swimming or even in the shower. It has a water resistance rating of up to 50 meters, making it perfect for tracking your swimming sessions and monitoring your progress in the pool. Just make sure you secure the tracker tightly to the wristband to prevent it from coming loose during rigorous water activities.

3. How long does the Fitbit Flex 2 battery last?
The battery life of the Fitbit Flex 2 can vary based on usage, but on average, it can last up to 5 days before needing a recharge. This is a significant improvement compared to some other fitness trackers on the market, ensuring that you can go for several days without worrying about running out of battery. The tracker can be charged using the included USB charging cable, which makes it convenient to power up at home or on the go.

4. Is the Fitbit Flex 2 compatible with my smartphone?
The Fitbit Flex 2 is compatible with a wide range of smartphones, both iOS, and Android. To use the Fitbit Flex 2, you’ll need to download and install the Fitbit app on your smartphone, which acts as a hub for syncing and accessing your fitness data. The app supports devices running iOS 11 or later, as well as Android 7.0 or later. Check the Fitbit website or consult the compatibility list to ensure that your smartphone is compatible with the Fitbit Flex 2.

5. Can I change the bands on the Fitbit Flex 2?
Yes, you can easily change the bands on your Fitbit Flex 2. The tracker itself can be removed from the original wristband and placed onto a new one of your choice. Fitbit offers a range of accessory bands in different colors, materials, and styles, allowing you to customize your Fitbit Flex 2 to match your personal preferences or outfit. Changing the bands is simple and requires no special tools, making it convenient to switch up your look whenever you want.