Fitbit is the global leader in dress accessories sales. There is a reason why their trackers are sold so much. They are easy to use, reliable, intelligent, provide vital statistics and have an excellent application behind them. In total, the company now offers eleven different devices to count steps and calories. Fitbit still sells all these, although some of the older devices like the Flex, the Charge, Charge HR and now the Alta, have been overcome with new versions. This makes older models redundant.

Fitbit Zip

The Fitbit Zip can be worn in your pocket, on a belt or in a bra, as it can be as discreet or as visible as you want it to be. This activity monitor counts the steps, the distance, the calories burned and synchronizes everything with your computer or smartphone. The accessory has a silicone clip and is rain, splash and sweat proof. The battery does not require charging and lasts up to six months.

The mobile application remains a well-designed and easy-to-use tool for viewing your data, monitoring your fitness progress, and also for controlling your food intake and water consumption. Any measure can be used to display data and daily or weekly totals. If you are just looking for a simple pedometer, this is the right one.

Fitbit One

The Fitbit One is also a clip / laptop belt to track your physical activity, but it goes a little further than Fitbit Zip. In addition to counting your steps, distance, and calories burned, the Fitbit One counts the number of stairs you have climbed. At dusk, the device also measures the quality of sleep, helps you sleep better and wakes you up in the morning.

While Fitbit One and Fitbit Zip were new and innovative in 2012 when they were launched, today the features they measure are fairly basic. However, if you are looking for a basic tracker to measure your activity, the Fitbit Zip and Fitbit One are a great choice because of their reliability, excellent value for money and a first-rate application with which you can view their data. You could also get a discount when you buy them.

Fitbit Flex

The Fitbit Flex is a thin wrist accessory. Monitor the steps, distance and calories burned and shows you how you are building up against your daily goals. At night, the device monitors their sleep cycles. LED lights show how your day goes according to your goal, while statistics are synchronized wirelessly and automatically.

The Flex is an older model, probably not worth the money, even if you get a discount. We suggest you go with one of the most modern trackers instead. For a small difference in price, you will get a heart rate monitor and monitor (depending on the model).

Fitbit Charge

The Fitbit Charge is a monochrome OLED display, which is very vibrant and easy to read, despite being about the size of a fingernail.

The device displays the time, total daily steps, distance traveled, calories, stair sections and cycles in the metric system, shown by pressing the left button. The tracker can also display caller ID information from a smartphone connected through the Fitbit application.

Fitbit likes to think of improvement for everyday users who want to get in shape and see how they are doing it in real time on their watch and also through the excellent free application and graphical desktop board. These devices definitely serve this purpose. We suggest however, by investing a few extra bucks, go for the upgraded Charge 2, which will also monitor your heart rate and look better about more reviews.

Fitbit Charge HR

Like the Charge, the Charge HR is a watch that measures the activity of your physical fitness right there on your wrist. The main difference is the inclusion of a heart rate monitor.

The PurePulse Optical Heart Rate Technology created by Fitbit uses secure LED lights at the bottom of the watch to detect blood volume and changes in capillary size under pressure. When your heart beats, your capillaries expand and contract depending on changes in your blood volume.

Compared to trackers without a heart rate monitor and those who only measure heart rate in real time, those who are continuously measuring provide a much more accurate figure of burning calories. Knowing your heart rate means that the device knows the intensity of the exercise.

Fitbit Surge

The Fitbit website refers to Surge as the fitness super-clock. This device is the most powerful Fitbit with GPS tracking, real-time training statistics and a heart rate monitor. But its increased specifications and LCD touch screen makes it bigger in size and price. The device records all the usual statistics you expect, such as: steps taken, distance traveled, calories burned, escalators, active minutes, caller ID, and sleep. However, the Surge goes a step further than other Fitbits including GPS maps.

Fitbit Blaze

The Blaze looks a lot like Apple Watch, but puts physical fitness first. It is the first Fitbit watch with a color touch screen, and allows you to swap bands. The device tracks physical activity and records heart rate, but lacks GPS Surge, which has all the functions. It will monitor daily steps, sleep, calories burned and 15 different types of exercises like running, walking, playing basketball and soccer, to name a few. The watch also offers guided activity through its FitStar application that runs on the watch. And Fitbit has finally added reminders to stand up.

Fitbit High

The Alta tracker has a slim sleek design, an important step in the look of 2015 looks. The device features a discreet, slightly curved OLED touchscreen. In terms of size, the bands are much smaller compared to the Fitbit Charge or the Charge HR.

In terms of prices, this is one of the cheapest trackers sold by Fitbit. The company has not included a heart rate sensor, which has enabled it to offer it at a discount compared to its other watches. Neither contains a GPS or an altimeter to count the floors up.

Fitbit Flex 2

The Flex 2 is the companys thinnest tracker and for the first time to a Fibit device it is water resistant. The device is 30% smaller than the original model and features a removable core unit and interchangeable thin, classic fitness bands in seven colors. A simple color-coded LED display to show progress towards your daily goal and keeps you connected with call notifications and text.

There is a full range of options if you want to customize the tracker. You can choose from a range of luxury bracelets with mirrored finish in stainless steel plated and stainless steel in pink gold or 22 carat rose gold, or elegant lariat style necklaces in stainless steel plated or stainless steel plated in 22k gold.

Fitbit Charge 2

This is the successor of the popular Charge HR. In addition to the PurePulse heart rate record, Charge 2 features improved exercise experience and new health and fitness tools.

Fitbit has released some new features that are driven by your personal heart rate. The one that seems very useful is called Cardio Fitness Level. Available only in Charge 2, it gives you an instant record of your fitness level using a personalized Cardio Fitness Score. The Cardio Fitness score is based on your estimated VO2 Max which is calculated by analyzing your user profile and resting heart rate. You can also see how it compares to people of the same age and gender.

The other new addition is guided breathing sessions. This is a relaxing experience that soothes your body and mind through personalized deep breathing sessions called Relax.

High HR

A little over a year after the original Alta, the Alta HR is here to add heart rate and sleep tracking to the mix. This makes it what Fitbit calls the thinnest in the world with a continuous heart rate sensor.

With the High HR, Fitbit has proven that it is possible to bring its PurePulse technology to such a tight device. So far, continuous heart rate monitoring has only been available on larger Fitbit devices such as Surge, Blaze and Charge 2. However, the company has developed a new chip that reduces size and number of components needed by 25%.

The tracker will also benefit from Fitbits new sleep features. The Sleep Stages feature uses the accelerometer and heart rate data to more accurately estimate how much time passes in light, deep and REM sleep stages every night. Values are calculated by combining accelerometer data, heart rate variability (time between beats) and Fitbits proprietary algorithms.