
The Fitbit Flex 2 is a sleek and stylish fitness tracker that's perfect for anyone looking to upgrade their fitness game. It's waterproof, so you can wear it while swimming or taking a shower without worrying about damaging it.
With a battery life of up to 5 days, you don't have to worry about recharging it every day. This tracker is designed to be low-maintenance, making it perfect for busy people.
One of the standout features of the Fitbit Flex 2 is its ability to track your sleep patterns. It can monitor your sleep duration, quality, and even detect when you're in a light or deep sleep.
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Key Features
The Fitbit Flex 2 is a fantastic activity tracker that's packed with features to help you stay on top of your fitness goals.
One of the key features of the Fitbit Flex 2 is its ability to track your daily activities, including steps, distance, calories burned, and active minutes. It's also got a built-in accelerometer that tracks your hourly activity, swimming, sleep duration, and sleep quality.
The Fitbit Flex 2 has a long battery life, lasting up to 5 days on a single charge. This means you can wear it every day without worrying about running out of power.
Here are some of the key features of the Fitbit Flex 2:
- Swim-proof and counts laps
- Interchangeable bands
- Reminders to move to get you out of your chair and active
- Automatically tracks certain exercises
- Call and text notifications to keep you connected
The Fitbit Flex 2 also tracks your progress towards your fitness goals, displaying it on its LED display. This is a great way to stay motivated and see how far you've come.
Design and Build
The Fitbit Flex 2 is a remarkably small device, measuring just 31.7 x 8.9 x 6.8mm and weighing 0.83oz. This makes it incredibly lightweight and easy to wear.
The device itself is made of a flexible, durable elastomer material similar to that used in many sports watches, providing a comfortable fit. A surgical-grade stainless steel clasp adds a touch of durability and style.
One of the standout features of the Flex 2 is its interchangeable accessories, which allow you to swap out the band for a range of different styles and colors. From basic bands to more elaborate pendants, there's something to suit every taste and lifestyle.
Here are some of the key design features of the Fitbit Flex 2:
- Proprietary charging cable (with replacement chargers available for $19.95)
- Five small LEDs on the top of the device for notifications and goal tracking
- Double tap functionality for checking progress towards daily goals
Flex

The Fitbit Flex 2 is a sleek and compact device, measuring 31.7 x 8.9 x 6.8 mm and weighing only 0.83 oz.
It's a great size for wearing on your wrist without feeling too bulky. The Flex 2 is also waterproof up to 50m, so you can shower and swim without taking it off. This is a big plus for those who enjoy water-related sports and activities.
Design
The Flex 2 is incredibly small, measuring 31.7 x 8.9 x 6.8mm and weighing just 0.83oz, making it easy to fit into a range of different accessories.
You can choose from a variety of color options, including Black, Lavender, Magenta, and Navy, when purchasing from Fitbit's website.
Fitbit's accessory page also offers other colors, as well as different styles of bangles and pendants.
Amazon has a wide selection of third-party bands, including patterned bands, leather straps, and even a clip for attaching the Flex 2 to your bra.

The device has no screen, but instead uses five small LEDs on the top to display basic notifications and your progress towards your step goal.
Double tapping the band shows a corresponding number of lights to indicate your performance, such as two lights for 4,000 steps out of a 10,000 step target.
Attaching the band to your wrist can be a bit of a pain, as the clasps can be difficult to put on at first.
However, once you get the hang of it, it becomes easier to tighten and loosen the band.
The Flex 2 comes with a proprietary charging cable, which can be a problem if you lose it, as replacement chargers are available for $19.95 from Fitbit's website.
A third-party charger from Amazon is also available for around $10, but a standard microUSB or USB Type-C charging method would have been preferred.
Materials
The Fitbit Flex 2 wristband is made of a flexible, durable elastomer material similar to that used in many sports watches. This material is designed to withstand daily wear and tear.
The clasp on the Fitbit Flex 2 is made of surgical-grade stainless steel, which is strong and resistant to corrosion.
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Display and Alternatives

A well-designed display can make or break the overall aesthetic of a project, so it's essential to choose wisely. Consider using a combination of materials and finishes to add depth and visual interest.
For example, a sleek glass display case can provide a modern and sophisticated look, as seen in the "Modern Glass Display" example. This design choice can be particularly effective in a minimalist setting.
In contrast, a wooden display cabinet can add a warm and cozy feel to a room, as demonstrated in the "Wooden Display Cabinet" example. This style is often preferred in traditional or rustic settings.
Some projects may not require a traditional display case at all, and that's okay. Consider alternative display options like a floating shelf or a decorative tray to showcase your items in a more understated way.
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Battery and Power
The Fitbit Flex 2 has a battery life that can last up to 5 days. You can track all day and night without needing a charge.
To keep your Fitbit charged, we recommend topping it up every few days. This ensures you're always tracking and ready to go.
The battery type is lithium-polymer, which is lightweight and efficient. Charge time is one to two hours, so you can quickly get your Fitbit back up and running.
If you're not careful, you might find yourself with a dead battery at the worst time. To avoid this, try to keep your Fitbit charged, especially if you're planning a workout or other activity.
Here are some key battery facts to keep in mind:
- Battery type: Lithium-polymer
- Charge time: One to two hours
- Radio transceiver: Bluetooth 4.0
To charge your Fitbit, you'll need to remove it from the strap. This is easy to do, but make sure you put it back the right way when you're done.
Software and App
The Fitbit Flex 2 has one of the best Android apps in the fitness tracking landscape, with a clean, simple, and intuitive interface that's sure to delight both casual and power users.
The app does come with a couple of caveats, however, such as the swimming autodetection being turned off by default, so you'll need to turn it on manually. This can be a bit annoying, but at least it's easy to do.
You can still track your routes by using the Fitbit app, which syncs with the footstep data coming from the band and plots your route on a map. This isn't as good as having a built-in GPS, but it's a decent alternative.
One of the best things about the Fitbit app is its ability to pair with other fitness tracking services, such as RunKeeper or Endomondo. This means that you can get a more complete picture of your fitness activities and progress.
Here are some devices that the Fitbit Flex 2 can sync with:
- Mac OS X 10.6 and up
- iPhone 4S and later
- iPad 3 gen. and later
- Android 4.4 and later
- Windows 10 devices
The app will also give you plenty of encouragement, with badges awarded for various milestones, weekly recaps, and a strong social element. This can be a great motivator to help you reach your fitness goals.
Get the Full App Experience

The Fitbit app is a key part of the Flex 2 experience, providing a clean and intuitive interface that's sure to delight casual and power users alike.
You can sync your Flex 2 with over 200 devices, including iPhone, Android, and Windows devices, using Bluetooth LE wireless technology. This means you can get notifications and track your progress on the go.
The app also comes with a social element, allowing you to compete with friends and earn badges for reaching milestones. This can be a great motivator, especially if you're trying to get more active.
One thing to note is that the swimming autodetection is off by default, so you'll need to turn it on in the app settings if you plan on tracking swims. This can be a bit frustrating if you forget, but it's easy to fix.
If you're new to tracking your running and workout stats, the app should provide enough information to get you started. And if you're already a seasoned athlete, you can pair your RunKeeper or Endomondo accounts with Fitbit's app to get even more detailed data.
Here are some devices that are compatible with the Fitbit app:
- iPhone 4S and later
- iPad 3 gen. and later
- Android 4.4 and later
- Windows 10 devices
- Mac OS X 10.6 and up
Overall, the Fitbit app is a powerful tool that can help you stay motivated and reach your fitness goals.
Memory

Your Fitbit Flex 2 can save a lot of data, including 7 days of detailed motion data minute by minute. This is really helpful for tracking your progress over time.
The device also saves daily totals for the past 30 days, giving you a clear picture of your activity levels.
You can store up to 30 days of daily totals, which is a great feature for monitoring your progress over time.
Water Resistance
The Fitbit Flex 2 is a game-changer when it comes to water resistance. It's the first properly waterproof fitness tracker from Fitbit, and it can track your swimming as an exercise activity.
You can wear it in the shower or bath, which is a big plus for those who like to keep their fitness tracking consistent. The Flex 2 is also guaranteed waterproof by Fitbit, so you don't have to worry about it getting damaged in water.
To track swimming, you need to enter the length of your pool in the Fitbit app, which will then accurately count your laps. This feature works with front crawl, backstroke, breaststroke, and butterfly.
Don't leave your Flex 2 in a bucket of water overnight, as Fitbit recommends avoiding extended exposure to water. But in reality, most Fitbits aren't as water sensitive as Fitbit warns.
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Performance and Data
The Fitbit Flex 2 is a reliable device that can hold up to 5 days of data before needing to be synced with your phone. This is especially handy for those who forget to sync their device regularly.
Syncing every few hours is recommended to keep track of your daily progress. You can sync it with your phone using the Fitbit app, which is available for both iOS and Android.
The Fitbit app is considered one of the best for showing your stats and other helpful data. It's also a great way to view lovely graphs showing your fitness and health trends.
The Fitbit Flex 2 is a great tool for kids too, making it a fun way to encourage them to stay active and healthy.
Specs
The Fitbit Flex 2 is a great tool for tracking your daily activity, and one of the key features is its ability to track your steps. It's a simple yet effective way to stay on top of your fitness goals.
This device can track your distance, calories burned, and active minutes, giving you a comprehensive view of your daily activity. I've found that having this information at my fingertips (or rather, on my wrist) helps me stay motivated to move throughout the day.
The Fitbit Flex 2 also tracks your hourly activity and stationary time, which can be really helpful in identifying patterns in your daily routine. For example, if you notice you're spending a lot of time sitting at your desk, you can try to find ways to get up and move around more often.
Here are some of the key metrics the Fitbit Flex 2 can track:
- Steps
- Distance
- Calories burned
- Active minutes
- Hourly activity
- Stationary time
- Sleep quality
In addition to tracking your daily activity, the Fitbit Flex 2 also monitors your sleep quality. This can be really helpful in identifying patterns and making changes to improve the quality of your rest.
Additional Features
The Fitbit Flex 2 has some really useful features that can help you stay active and connected. One of the standout features is its swim-proof design, which means you can wear it while swimming and it will still track your laps.
You can also customize your Fitbit Flex 2 with interchangeable bands, giving you a range of styles to choose from. Plus, new accessories like a pendant are available, which can add a touch of personality to your tracker.
The Fitbit Flex 2 also offers reminders to move, which can be a great motivator to get you off the couch and moving throughout the day. These reminders are triggered if you miss the 250-step an hour minimums.
The Fitbit Flex 2 tracks certain exercises automatically, so you don't have to worry about manually logging your workouts. And, with call and text notifications, you'll never miss an important message.
Here are some of the key features of the Fitbit Flex 2:
- Swim-proof design
- Interchangeable bands
- Reminders to move
- Automatic exercise tracking
- Call and text notifications
Price
The Fitbit Flex 2 is a great option for those on a budget, costing £79.99, which is actually a great value considering the features it offers.
You can compare this price to the cost of a gym membership or a good pair of running shoes, and it's clear that the Flex 2 is a worthwhile investment.
The price of the Flex 2 is actually lower than some of Fitbit's other models, such as the Fitbit Alta, which costs £129.99, and the Fitbit Charge 2, which also costs £129.99.
The Flex 2 is also available in various accessories, like the Silver Bangle or Pendant, which costs £69.99, making it a more affordable option.
You'll need to purchase the wristband separately to get your hands on the tracker, but it's worth it for the features and value you get.
Our Verdict
The Fitbit Flex 2 is a chic and slim, lightweight wristband that tracks and monitors your daily activity and sleep patterns.
It's also waterproof, which means you can wear it while swimming or walking in the rain without worrying about damaging it.
You can compete with Fitbit-using friends, which adds a fun social element to tracking your fitness goals.
The Fitbit Flex 2 has a wide range of accessories, including a bangle and pendant, which makes it easy to customize to your style.
It's addictive and fun to use, and the added motivation to walk or run further will keep you coming back for more.
Frequently Asked Questions
How old is the Fitbit Flex 2?
The Fitbit Flex 2 was released in 2016, making it a relatively older model. If you're looking for a more recent Fitbit, consider checking our other FAQs for newer options.
Has Fitbit Flex been discontinued?
Yes, Fitbit Flex has been discontinued and replaced by newer models. Consider checking our list of the best Fitbits or fitness trackers for a new wearable.
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