Polar A370 vs Fitbit Charge 3 – Which is the Best Fitness Tracker?

Fitness tracking is becoming a very popular activity for many athletes, swimmers, runners, bodybuilders, and regular fitness enthusiast. The idea behind fitness tracking is that by gaining access to critical stats on-demand you’ll be able to optimize your fitness performance and overall health condition based on this information.

Technology is a large reason why fitness tracking has become so popular in recent years, making it seamless and convenient for people to have access to health information that previously would’ve required a lot of equipment or time to analyze. There are lots of ways for you to track your fitness progress from mobile apps to wristwatches to wearable bands and more.

These are the most common types of fitness tracking devices used today and they are known as wearable technology. Wearable technology is a term used to describe any smart device that can be worn either on your wrist or another low-profile area on your body. These devices serve multiple purposes including playing music, banking, social media, streaming, calling, and more. There are some special wearable smart devices that only serve one purpose though and that is to assist hikers, outdoor enthusiasts, swimmers, and athletes in optimizing their training routine and overall activity levels.


Wearable smart technology gives us the ability to easily access detailed information about the condition of our body’s in real-time. It’s really astonishing to see such a small device that can go on your wrist be powerful enough to provide detailed statistics about your heart rate and blood pressure among other things. This sort of health monitoring is something that athletes across the world have been waiting for and their rapid adaption of the technology proves that the speculation was true.

Two of the most popular fitness tracking devices out on the market are the Polar A370 & the Fitbit Charge 3. These two wearable smart devices provide an array of health and fitness related analytic tools and apps dedicated to helping people improve their performance where they need it the most. The days of using your finger against your neck to calculate your heart rate and pulse are long over and these types of wearable smart devices are slowly but surely becoming dominant.

The Polar A370 and the Fitbit Charge 3 both provide an insane amount of functionality and fitness assistance tools to help you excel further in whatever sport you choose to dedicate your time to.

Both of these devices offer an immense amount of versatility and connectivity options making it easy for you to stay connected regardless of where your adventures guide you. Both the Fitbit Charge 3 & the Polar A370 were specifically designed for fitness tracking and vital statistics monitoring.

Both of these smartwatches come with integrated features such as activity monitors and heart rate sensors so that you can get an up close and personal view of your health displayed on your wrist. In this guide, we’re going to give you an in-depth look at the Polar A370 side by side with the Fitbit Charge 3 so that you can make a decision on which wearable smartwatch is best for your individual needs. You’ll find out about detailed spec information, connectivity options, apps, and more so make sure you take your time when reading this guide.

The winner of this comparison is the Fitbit Charge 3 largely due to its incredibly accurate fitness tracking that is used by professionals in all sorts of sports. The Fitbit Charge 3 also comes packed with a wide array of compatible apps and accessories to customize and fine-tune your experience even further. Not to mention, Fitbit is one of the most trusted manufacturers of fitness and health monitoring smart technology out on the market.

Polar A370: The Company Behind the Product

Polar produces a wide array of active sports bands and watches which are all designed for specific sports such as running and hiking. The Polar product line consists of some really innovative and cutting-edge technology which has accelerated their growth as a company. Their extreme dedication to providing customized solutions for people in all aspects of fitness is something that you don’t see out of many companies and this practice makes Polar stand out amongst the crowd.

Their product catalog is huge with over 9 specialized fitness tracking smartwatches that can help you boost physical performance and results. Polar puts an emphasis on quality product manufacturing and reliable build quality, this translates over into not only the design but the technical aspect of all their devices as well. All of these unique qualities and features are brought together by the way Polar integrates seamless connectivity support and data sharing in their smart devices.

Polar: About the Company

Polar has been in the health and fitness industry for over 42yrs producing heart rate monitors and other innovative technology related to the health industry. Polar has a very rich medical industry-based history which places them in an elite class of manufacturers for smart wearable technology today.

Polar has established many relationships over the years with large corporations, hospitals, and businesses related to the health sector and maintains many of these relationships to this day. Polar uses a potent combination of physiology, electronics, and sports knowledge to craft every unique smart device that is offered by them today.

Polar provides full-range product options for individuals at all levels of health and fitness making it easy for everyone to gain access to the information and assistance that they need. Polar is passionate about helping their customers succeed in the desired arena which is why they offer training tips, advice, and essential support to help you become the best you possible.

Polar products are designed to aid people in all walks of life including weight management, injury recovery, dieting and more which is what makes their products so versatile and easy to use.

Polar is made up of individuals who are highly ambitious and possess great potential for incorporating their unique talents in the future. Polar is truly one of the most unique wearable technology companies out there and they are showing no signs of slowing down.

Polar A370 Review

The Polar A370 is a smart fitness tracking watch that comes packed with a ton of features which can help any athlete take their game to the next level. The Polar A370 provides customizable activity and fitness profiles designed to give you an in-depth look at all of your vital bodily functions on a personal level.

The Polar A370 features an integrated always-on heart rate monitor that constantly tracks your heart rate as long as you are wearing the device. The Polar A370 also possesses WR30 water resistance which allows you to adapt quickly to changes in activity without losing the ability to monitor your vital stats. The Polar A370 manages to deliver fluid functionality bundled with a feature-rich operating system wrapped in durable materials and a reliable fit.

The sheer amount of information about your body that is accessible by using the Polar A370 truly shows how far technology has brought us and how far it will take us into the future. The Polar A370 features 24/7 activity tracking which gives you a summary of your entire daily routine seven days a week so that you can make adjustments when needed. The built-in 24/7 activity tracking feature is also great for those people who are trying to maintain a diet or strict fitness routine as you can use the information provided by the Polar A370 to research optimal meal times and much more.

The Polar A370 monitors your activity 24/7 by using frequencies to determine moments when physical energy is either regular intense. By combining this information with your basic health profile, the Polar A370 is able to provide a shockingly accurate description of your health condition. The Polar A370 reads five different activity levels which are sitting, low, resting, high, and medium. Resting levels would be when you’re sleeping or laying down, low levels are registered when you stand or perform light tasks, medium levels would be moderate exercises like jogging, and high levels are registered when intense physical energy is detected.

All of the intensity level reading indicators are very robust and allow the Polar A370 to cater your experience to your specific needs in a very detailed manner. The Polar A370 also features an integrated sleep assistant which helps you achieve optimal levels of rest each night. You can set pre-set sleeping times which will determine what time you should aim to go to sleep at every night. Additionally, you can use the Polar A370 integrated sleeping assistant to recommend sleeping times based on your activity level throughout the day.

The Polar A370 also measures your sleep quality and can give you tips on how to get more quality rest each night. The Polar A370 leaves no stone unturned with its built-in smart calorie tracker which can help you maintain a steady diet and GPS tracking via your mobile device for runners or other athletes who take their training into the real world. The Polar A370 monitors your training history and gives you a report based on a pre-determined timeline.

The following section is going to give you an inside look at what comes in the box when you decide to purchase the Polar A370

Inside the Box

  • Standard– Polar A370 watch, micro USB data/charging cable, warranty information, starter manual.

The Polar A370 comes ready to use out of the box and provides all of the features you need and want in a simple and durable package.

In-Depth Feature Review

The Polar A370 is a true wrist-top powerhouse that delivers a robust set of features and connectivity options for you to utilize to your advantage. When it comes to a comprehensive fitness monitoring smart device, the Polar A370 is about as feature-packed as they come.

The Polar A370 comes with the following built-in features:

  • 80×160 Resolution Display
  • WR30 Water Resistance
  • Rechargeable battery
  • 15 Language options
  • Bluetooth Smart
  • Mobile Phone Notifications
  • Vibration alerts
  • Alarm
  • Button Lock
  • Date and week indicator
  • Time indicator
  • Wrist-based Heart Rate Monitor
  • Heart Rate Zones
  • Smart Calories
  • Training Benefit
  • Polar Fitness Test
  • ZonePointer
  • HR max
  • GPS
  • Training History
  • Sports Profiles
  • Heart Rate Sensor Mode
  • 24/7 Activity Tracking
  • Sleep Plus
  • Sleep duration and quality assistant
  • Steps and Distance Counter
  • And more

The Polar A370 allows you to create customized fitness profiles and tracking metrics so that you can optimize your performance needs accordingly. The Polar A370 is the ultimate fitness lifestyle companion for those who want a complete report of their daily activities.

The Polar A370 is consistently monitoring your vitals while you wear the device to provide comprehensive details about all areas of your fitness routine, diet standards, activity levels, sleep pattern, and much more. The Polar A370 features a really unique testing mode known as the Polar Fitness Test which measures your aerobic fitness levels while at rest. The test is capable of evaluating your maximal oxygen intake and gives you a detailed report about how your health level matches up with people of similar age and gender groups.

The built-in Polar Fitness Test uses a combination of measurements including your heart rate variability, heart rate, body weight, age, height, and your desired fitness goals to provide a recommended fitness plan that will encourage you to stay motivated and active. The Polar A370 also gives you access to a heart-rate based calorie calculator which allows you to see the total amount of calories consumed and used during your physical activities.

Polar A370: Pros & Cons


  • Built-in heart rate sensor and heart rate zone indicators so that you can stay alert to any potential problems with overexertion.
  • Polar Fitness Test which allows you to get an accurate analysis of your current aerobic fitness levels.
  • Smart calorie tracker that helps you stay up to date about current carbohydrate intake and use amounts.
  • Customizable sports profiles which let you modify tracking metrics based on the specific activity you’re engaged in.
  • Training history report allows you to view entire portions of your training information based on timeline years and dates.
  • Integrated GPS which helps you stay on track when hiking, running, or doing any physical activity outdoors.
  • Wrist-based heart rate measurements which make it easy to always get a consistent and accurate reading.
  • 24/7 Activity tracking allows you to know what your body is going through all times of the day.
  • Sleep duration and quality monitoring to ensure that you achieve optimal levels of rest each night.
  • Inactivity alert which makes you aware of times when you haven’t participated in any physical activity for a long period of time.
  • Continuous heart rate reading which makes sure that there is never a moment when you don’t know how your heart is performing.


  • Lacks more intuitive GPS features like trail planning or maps.
  • Personalized sport modes are not as comprehensive as other competing fitness trackers on the market.
  • Limited color and sizing options available

Polar Warranty Information

The Polar warranty states that all products legally purchased by the company are covered under a 2-year warranty which protects the consumer from manufacturer defects and other material issues. The Polar limited international guarantee does not cover items that have been damaged due to normal wear and tear, improper care procedures, abuse, or accidents.

The Polar limited international guarantee only protects products that can be verified with a purchase receipt to have been defective from the date of the original purchase. If your product is found to be eligible to receive service under the Polar limited international guarantee, you must ship the item to Polar repair facilities and wait for a response. Depending on the results of the inspection your device will be deemed protected or unprotected and either will be replaced or repaired.

FAQ’s About Polar A370

How much does shipping cost if I purchase a Polar A370 directly from the website?

Shipping costs vary from location to location and you have the option of choosing between standard and express shipping methods.

Can I order a Polar A370 by using a telephone?

Currently, the only way to purchase Polar products are either online or in a physical retail location.

I have a question about billing, who do I contact?

If you have any questions regarding the billing aspect of your Polar A370 purchase you can either call or email their support team for assistance.

Where to Buy the Polar A370

The Polar A370 is available in a lot of sporting good specialty stores and popular electronics retailers. If you plan on purchasing a Polar A370 at an actual store location, you need to either check their website or call before visiting to ensure that they have the right Polar A370 version you want. A much more convenient alternative is to purchase the Polar A370 directly from the official Polar website. Not only will you receive special discounts and deals by using the official website, but you’ll also receive standard warranty protection on all items.

Fitbit Charge 3: The Company Behind the Product

Fitbit is a fairly new yet well-established company which is what makes it so unique when compared to other tech companies. Fitbit’s primary goal is to create useful activating tracking and health monitoring devices that people at all levels can use. The Fitbit product line consists of an array of various models and design types all specifically targeted to individual sports and athletes. Fitbit promotes ultra-connectivity and accurate monitoring capabilities to deliver products that are fast and powerful.

Fitbit has been very popular with both expert and beginner fitness enthusiasts alike largely due to it’s easy to use interface and advanced capabilities. Fitbit already has a pretty extensive product catalog however they plan to keep progressing and the Fitbit Charge 3 is a perfect example of how the company has come since it was introduced to the market.

Fitbit: About the Company

Fitbit was founded in 2007 by two young entrepreneurs named James and Eric, James and Eric had the vision to introduce wireless technology and the fitness world in an unprecedented way. Their mission was very successful as the two young men were fitness enthusiasts themselves and realized how far sensory technology had evolved with the question of why it wasn’t being used In more everyday practical applications on their mind.

Since it’s inception in 2007, Fitbit has grown to be one of the most dominant manufacturers of smart wearable technology in the world. Fitbit today has offices in several countries throughout the globe including Hong Kong, Seoul, New Delhi, Dublin, Tokyo, and more.

Their expansive vision to create a line of functioning and useful health equipment that people can carry without a hassle has translated well with their customers and market base as a whole. Fitbit has been a pioneer of sorts in the world of wearable technology being one of the first most recognizable companies offering these devices largely before they became as popular as they are today.

Fitbit produces a wide array of high-quality fitness and health monitoring wearable devices that use the smooth Fitbit platform to deliver amazing accuracy and precision.

Fitbit Charge 3 Review

The Fitbit Charge 3 is one of the most comprehensive wearable smart fitness trackers out on the market. Building on previous versions of the device, Fitbit integrated new features such as swim proof technology and automatic exercise recognition to make your workouts and sports activities easy to keep track of.

The Fitbit Charge 3 comes with 15+ built-in goal-based exercise modes which prompt you on how to maximize your efforts in achieving a wide range of different fitness goals and health levels. The Fitbit Charge 3 also features a very powerful battery that is capable of giving you up to 7 days of full charge even under intense physical activity monitoring so that you’re always up to date about your vital stats.

The Fitbit Charge 3 features a smart touchscreen which removes the hassle of pressing buttons with a smooth display that is very responsive to touch inputs. The display is also calibrated to automatically adjust to an array of lighting conditions so that you always have a clear picture, the display also shows notifications from connected devices which makes balancing your fitness life that much easier.

The Fitbit Charge 3 has smartphone notification capabilities which allow you to receive calls, texts, calendar alerts, app notifications, and more. The Fitbit Charge 3 provides real-time fitness tracking data which allows you to adjust your activity level and approach based on your current results. The Fitbit Charge 3 also comes with integrated all-day activity tracking which monitors information such as the number of floors you’ve climbed, calories burned, distance, and more.

The Fitbit Charge 3 has a built-in resting heart rate monitor that records your resting heart over time in order to alert you about progress or potential issues. The Fitbit Charge 3 comes with a multitude of personalized fitness apps which provide detailed insights into particular areas of your health. The Fitbit Charge 3 also has an app dashboard that allows you to easily organize your fitness metrics and health rules to efficiently manage your daily fitness activities.

The Fitbit Charge 3 also gives you the ability to pay on the go with Fitbit Pay, you can load your most used cards onto the watch in order to use them whenever you need to. The Fitbit Charge 3 puts style into your hands with a wide selection of custom bands and accessories you can use in order to add more space or comfortability when needed.

Let’s take a look at what comes inside of the box when you purchase the Fitbit Charge 3.

Inside the Box

  • Standard– Fitbit Charge 3 watch, USB data/charging cable, user manual, warranty information, one band, one buckle, a large band, and a small band.

You can purchase accessories and add-ons during the check process if you want an extension that isn’t offered by the standard production model.

In-Depth Feature Review

The Fitbit Charge 3 is packed to the limit with tons of really innovative and revolutionary technology. The Fitbit Charge 3 provides true all-around fitness tracking and health monitoring features that you don’t find in many competing brands. Let’s take an in-depth look at all of the features that the Fitbit Charge 3 has to offer.

The Fitbit Charge 3 comes with the following integrated features:

  • Guided Breathing Sessions
  • App Dashboard
  • Reminders to move
  • Fitbit Today
  • Wireless Sync
  • Female Health Tracking
  • Swim-proof technology
  • Real-time distance & pace monitoring
  • Automatic Exercise Recognition
  • Resting Heart Rate
  • Heart Rate Zones
  • All-day Calorie Burn
  • Sleep Tracking and Stages
  • 24/7 Heart Rate
  • Smart & Sharp Touchscreen
  • Smartphone Notifications
  • All-day activity tracking
  • Cardio fitness level indicator
  • 15+ Goal Based Exercise Modes
  • 7-day battery
  • And more

Fitbit Charge 3 is one of the most versatile smart fitness tracking devices available on the market. It’s intuitive and well-built design quality in combination with the insane number of features you receive easily make is one of the most fully capable smartwatches you can find to assist you with reaching your fitness goals. On top of everything, the Fitbit Charge 3 provides unlimited possibilities for customizing the experience to fit your exact needs.

Fitbit Charge 3: Pros & Cons


  • Lightweight design that makes for a durable product that lasts long without putting excessive strain on your body.
  • Integrated apps and app dashboard make it easy for you to stay up to date about all aspects of your health.
  • Fitbit Pay allows you to easily purchase goods and other items conveniently without having to carry a wallet or purse.
  • Female health tracking which makes it easy for women to receive updated information about their symptoms and period cycle.
  • Real-time distance and pace monitor so that you always know where you are and how active you’ve been.
  • Cardio Fitness Level mode allows you to monitor your cardiovascular health condition.
  • Sleep tracking and stages mode, helps you obtain optimal amounts of rest each night based on the previous day’s activity levels.
  • Resting heart rate monitoring allows you to get a snapshot of your heart rate over time to see if your physical routine is improving or hurting your resting heart BPM.
  • Automatic exercise recognition makes it easy to switch between activities and sports without worrying about miscalculations or missing vital stat updates.
  • All-day Calorie burn tracker allows you to monitor your calorie intake throughout the entire day to make changes in your diet when needed.
  • All-day activity tracking keeps a detailed report of all of your day’s activity levels and metrics to provide a comprehensive report on your overall health.
  • Wireless sync capabilities allow you to instantly transfer vital information from one device to another for comparison and adjustments.
  • Heart Rate zones which alert you when your heart rate reached extremely low or extremely high levels of activity.


  • Limited sizing options available which make finding the perfect fit a little difficult.
  • Limited color options which make the line kind of dull however you can customize the clock face itself.

Fitbit Warranty Information

Fitbit extends a basic limited product warranty on all of their products which protects your purchase for up to exactly one year after the original purchase date. The Fitbit limited product warranty only covers damages or product malfunctions caused during the manufacturing process. Any Fitbit item requesting warranty service will be screened and analyzed prior to being either repaired or replaced. Fitbit reserves the right to either approve or deny a warranty claim based on their sole discretion.

FAQ’s About Fitbit Charge 2

What mobile devices are my Fitbit Charge 3 compatible with?

The Fitbit Charge 3 is compatible with a wide array of mobile devices including iPhone and Android devices.

How do I set-up personalized fitness monitoring?

When you receive your Fitbit Charge 3, you’ll also receive an instruction manual which will tell you all of the steps involved with setting up your personal fitness monitoring profile.

What happens if my band breaks?

If the band on your Fitbit Charge 3 happens to break, you can simply purchase another band or use one of the replacements that come in the packaging.

Where to Buy the Fitbit Charge 3

Fitbit Charge 3 is sold in a lot of popular technology stores and online retailers. If you are interested in purchasing the Fitbit Charge 3, consider going online to do some research about potential stores in your area who carry the product. Alternatively, you can purchase a Fitbit Charge 3 directly from the official Fitbit website in order to receive discounts and special deals. By purchasing a Fitbit Charge 3 from the official website, you’ll also be able to receive the free no-obligation 45-day satisfaction guarantee return policy.

The Fitbit 45-day satisfaction guarantee return policy allows you to return your purchase for any reason at all as long as you do so within the first 45 days from the original purchase date. If you decide to purchase a Fitbit Charge 3 from a regular retail store, you’ll have to contact them to find out more about their specific return policy.

Final Thoughts

Both the Polar A370 and the Fitbit Charge 3 provide an immense set of features and options to help virtually anyone looking to take their health seriously. While the Polar A370 focuses on clean integration of basic health monitoring capabilities, the Fitbit Charge 3 takes it to the next level with its sheer amount of power and accuracy.

The Fitbit Charge 3 is the clear winner in this comparison for many reasons although the main one is the fact that it has a touchscreen display and integrated 24/7 heart rate monitoring.

The Fitbit Charge 3 is like having a personal nurse walking around with you all day, it allows you to gain insight into every aspect of your life whether it be diet, sleep, exercise, sports, and more. The Fitbit Charge 3 makes it easy for you to view a complete snapshot of your health progress since the first day you activated the device which is something that the Polar A370 does not offer. The Fitbit Charge 3 also features a much more stable and streamlined design that makes it extremely comfortable to wear regardless of the activity you’re participating in at the moment.

The Fitbit Charge 3 has a built-in female health tracker which makes it super easy for women to stay on top of those sensitive periods throughout the year. The Fitbit Charge 3 also comes with automatic exercise recognition which is a first of its kind, the feature automatically switches tracking metrics and stats analysis to perfectly match the activity or exercise that you’re engaged indirectly. This allows users to maintain consistent and accurate fitness monitoring without the need to change your profile manually.

The Fitbit Charge 3 is the perfect smart fitness tracking watch out on the market today. We definitely recommend this fitness tracker!

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