9 Most Accurate Calorie Trackers For Fitness Lovers (2024)

If you’re looking for the most accurate calorie tracker, you’re in the right place. 

Even though there are a lot of fitness trackers out there, few of them allow you to accurately track your calories.

A true fitness tracker not only allows you to track calories burned, but you can also look deeper into your other fitness metrics like Sleep, heart rate, SpO2, stress, and more.  

We have reviewed some of the best fitness trackers with the most accurate calorie-tracking capabilities for your ease. So let’s have a look!

9 Most Accurate Calorie Trackers That You Should Try

1- Fitbit Sense 2

fitbit sense 2

Fitbit Sense 2 is a new flagship with some new health-tracking features. This fitness tracker is considered the most accurate calorie tracker because of its 3-axis accelerometer. It measures your calories burn in all stats; whether you’re running, walking, or resting, it will measure your calories burn. 

Fitbit Sense 2 also measures calories based on your metabolic and heart rates. Especially when you’re sleeping at night, it will use a heart rate sensor to measure your calorie burn because, at that time, an accelerometer can’t track movement. 

Apart from accurate calorie tracking, the Fitbit Sense 2 offers advanced sleep tracking, SpO2, stress tracking and more. 

For fitness enthusiasts, the Fitbit Sense 2 also brings a Cardio Fitness Score; it will help you to measure your fitness level using VO2 max. You can also view your wellness report and generate PDF to share with the doctor. 

Moreover, this time, Fitbit has also included blood glucose tracking in the app, which is a big plus for diabetics. Sense 2 includes different sports modes for outdoor sports, and it will automatically track most exercises. 

When it comes to battery life, Sense 2 has improved battery life; it offers you 6 days of battery backup. 

2- Apple Watch 8

apple watch 8

Apple has recently introduced the new Watch 8, a host of health-tracking features. From calorie tracking to women’s health tracking, Apple Watch 8 dominates the market. 

Just like the predecessor Apple Watch 8 uses your data like age, height, weight etc., to calculate calories burned. Watch 8 has a more accurate accelerometer, making it the most accurate calorie tracker on the market. 

The good thing is Apple Watch measures your calories burn in real-time. This means if you’re doing any activity or workout, it will show real-time calorie burn data on your watch. Similarly, Watch 8 immediately syncs data on Apple Health App and lets you get a PDF report. 

Apart from the calorie tracking feature Apple Watch 8 offers new Heart rate zones that let you know about your current training status. 

If you’re struggling to improve your sleep habits, consider Apple Watch 8. It comes with an improved Sleep app with a sleeping couch. The watch measures your sleep data for a week and then suggests a sleep program based on your sleep habits. It will measure your sleep stages, including REM, light Sleep, Core Deep Sleep etc. 

Moreover, Apple Watch 8 has a new temperature sensor that helps track women’s health. It gives you accurate periods predictions and ovulation data estimation. You can view these alter on your watch. 

The battery life of the Apple Watch 8 is mostly similar to the Watch 7. It lasts 18 hours in normal mode, but its new Low Power Mode gives 36 Hours of battery timing. 

Apple Watch 8 is also considered best for outdoor purposes as it has crack resistant design and IP6X certification for dust resistance. It also includes various built-in sports modes and customized workouts.

3- Galaxy Watch 5

galaxy watch 5

If you’re an Android user, this new Galaxy Watch 5 is the best accurate calorie tracker for you. Galaxy Watch 5 has an advanced curved sensor design that gets closer to your wrist and accurately tracks most of your health features.

It includes a 3-in-1 Bioactive sensor, a new addition to the watch that measures your body fat composition, SpO2, calories and more. Apart from this, it also includes an HR sensor and accelerometer that also measures calories burned. 

Galaxy Watch 5 allows you to set daily calories burning goals. And based on the goals, it suggests you take steps. 

For sleep tracking, GW5 is the best option. It deeply measures your sleep data and, based on the data, creates a 5-week sleep program that helps you to improve sleep quality. 

Further, the watch includes an ECG app, blood pressure monitoring, stress tracking, women’s health tracking and more.  

Galaxy Watch 5 offers 16GB of storage for music lovers, and you can pile up your playlist with your favorite songs. Similarly, you can also answer calls from your watch. 

Regarding battery life, the Galaxy Watch 5 lasts 50 hours, which seems good compared to its predecessor. 

4- Fitbit Sense

calorie tracker


OSFitbit OS
CompatibilityAndroid, iOS
Display1.5” AMOLED
Internal Storage4GB
IP rating: 5ATM
Battery Life6+ Days

Fitbit Sense is one of the most comfortable calorie trackers. This fitness-centered fitness tracker has many health features like an ECG app, temperature monitoring, SpO2, etc.

Fitbit Sense uses Fitbit Appwhich requires your information such as sex, height, age, weight, etc. With the help of this information, the app calculates your calories burned.

Similarly, it also has an accelerometer that measures your movements and, based on them, estimates calories burned.

There are Active Zone Minutes; the feature helps you measure the minutes you spend in any heart-pumping activity. The more active minutes you earn, the more your performance will be. 

Moreover, the Fitbit Sense includes 20 gloss-based exercises, including running, hiking, swimming, walking, cycling etc. It automatically tracks most basic sports. During sports activities, it measures your calories burned, SpO2 performance, heart rate, distance and speed etc. 

The Fitbit Sense sync data in real-time with the Fitbit app, so you can view your health metrics immediately. 

If you’re a fitness-conscious person and want deeper insights into your fitness routine, you can avail Fitbit+ subscription.

Apart from the health feature, Fitbit Sense includes Fitbit Pay for making contactless payments. You can also view notifications, make calls, reply to texts etc. 

According to Fitbit, the Sense lasts for 6 days. But in our real-time testing, it lasts between 4-5 days with 24/7 heart rate and maximum performance.

5- SAMSUNG Galaxy Watch 3 

 Galaxy Watch 3 


OSTizen OS 5.5
CompatibilityAndroid, iOS
Internal Storage8 GB
IP rating: 5 ATM
Battery Life2 days

Galaxy Watch 3 is designed to manage your fitness routines, smash fitness goals, and deeply monitor your fitness routine. It tracks your burned calories based on your weight, heart rate, speed, and distance.

The Samsung Health App on Galaxy Watch 3 measures your calories burned in real time. Whether in rest mode or performing any activity, it accurately monitors your energy expenditure.

Calories burned during workouts and activities vary a lots from person to person. But Galaxy Watch 3 will gives you an accurate estimate of your calories burned based on the private data that you’ve put in.

Besides that, it has many sports modes, using which you can track your calories burned.

All these modes require your information to estimate your calories burned. This information includes height, gender, heart rate, speed, distance, etc.

Galaxy Watch 3 works best with Android phones. It has a dual-core 1.15 GHz processor with 1GB RAM for smooth and faster performance. So the watch will never get stuck while measuring your health features.

Galaxy Watch 3 is the first Galaxy watch with a certified ECG app and blood pressure monitor. Using its advanced ECG app, you can check signs of Atrial fibrillation. And you can also generate a PDF report and share it with your doctor.

6- Apple Watch 7


OSWatch OS 8
Display1.61 inch
Storage32 GB
IP rating: 50 meters
Battery Life18 hours

The Apple Watch Series 7 is a watch with a bigger screen, and you can view your health insights in a better way. Also, a bigger display gives you the advantage of easily typing text messages using a QWERTY keyboard.

Apple Watch 7 is one of the most accurate calorie tracker. It measures your calories during different activities, in resting conditions, and during the night. You can also keep track of your nutrition and diet using third-party apps on Apple Watch 7.

Also, there are tons of different watch faces available that show your calories burn metrics to see them at a glimpse. Moreover, you can also see how many minutes of activity you have performed.

You can also view your blood oxygen level, which is the primary indicator of wellness. Similarly, Watch 7 measures SpO2 during the night. Further, it also has an ECG app, stress tracking, breathing app, and more.

Apple Watch 7 has an advanced user interface that shows different graphs, animations, and visuals to better understand your performance.

But unluckily, the best battery performance is still lacking in the Apple Watch 7. It will last for 14 to 15 hours. But luckily, it supports fast charging, and in just 2.5 hours, it will fully juice up the battery.

7- Fitbit Charge 5

charge 5


OSFitbit OS
CompatibilityiOS, Android
Display1.58 inch
IP rating: 50 meters
Battery Life7 Days

Fitbit Charge 5 is the top-rated calorie tracker with the utmost accuracy. Its always-on color display, sleeker design and new amazing health and fitness features have made it significant from the previous models.

With the new curve bezel, you also get a thinner dial than Fitbit Charge 4. Similarly, Fitbit has added a new color display; the 1.04 inches AMOLED touch screen is a plus point.

If you are too conscious about your calories burned, you can pick this affordable fitness tracker. It not only gives insights into calories but also measures your blood oxygen level, ECG, sleep, stress etc.

Also, while running and walking, you can see your calories burned by tapping on your screen. You can see the average pace, current pace, heart rate, steps taken and distance traveled, etc.

It includes 20 different exercise modes under the hood to easily monitor your indoor and outdoor activities. The new SmartTrack feature automatically tracks the most popular exercises like; running, cycling, hiking, swimming, etc.

Moreover, Fitbit Charge offers 7 days of battery backup. Long battery life makes you stress-free as you don’t need to put your tracker on charge every night.

8- Polar Ignite

accurate calorie tracker


CompatibilityiOS, Android
Display1.2” O
Internal StorageNA music storage
IP rating: 30 meters
Battery Life3 days

Polar is a well-known smartwatch brand that offers high-quality multi-sports watches. You can make Polar Ignite your new-generation workout partner. Polar Ignite comes with accurate algorithms and sensors to monitor your calories burned. 

This watch has advanced sensors that can track your high-intensity moves to get an accurate calorie-burning number. It tracks your calorie burn based on height, age, weight, gender, heart rate, and training conditions. 

Especially if you’re involved in HIIT workouts, Cardio training, or weight lighting, this fitness tracker is best for you. It includes a smart FitbitSpark feature that plans your workouts based on your fitness conditions. 

This fitness tracker measures your sleep and monitors how well you recover from stress and training load during the night. You can also use its Serene app to calm yourself and reduce stress. 

The great Polar Ignite offers ready-made and on-demand workouts according to your fitness level. So you don’t need a trainer; this watch is your best companion from now. 

Polar Ignite gives a good battery performance. It comes with a 165 mAh battery that lasts for 5 days in watch mode with continuous HR tracking and 17 hours in training mode with GPS. 

9- Garmin Vivoactive 3 

how to track calories with vivoactive 3


CompatibilityiOS, Android
Display1.2″ (30.4mm) diameter
Internal StorageStore up to 500 songs
IP rating: 50 meters
Battery Life7 days

Garmin Vivoactive 3 has a durable and solid design making it a perfect option for outdoor enthusiasts. It has a stainless steel bezel and Gorilla Glass 3 protection against scratches and dust.

Garmin Vivoactive 3 uses an accelerometer to measure your calories from day-to-day activities, heart rate, gender, weight and height. It is one of the most accurate calorie trackers because of its advanced sensors.

Moreover, Vivoactive 3 is the best option for runners. It gives deep insights into your running and other outdoor sports. You can also view VO2 max performance during activities.

It can also calculate your stress using heart rate variability. The advanced sleep tracking app in Vivoactive 3 gives you deep insights into sleep stages, bedtime, and quality.

Vivoactive 3 keeps you connected with your friends and family. It offers a smart notification system, so you can view text messages and also reply to them. With its Garmin pay feature, you can make contactless payments on the go.

In terms of battery performance, Vivoactive 3 is better than big competing brands, and it lasts for 7 days in smartwatch mode and 13 hours in GPS mode.

Things To Consider Before Choosing The Most Accurate Calorie Tracker

The market is overloaded with fitness trackers, and all of them can track calories burned. But it’s not a question of calorie tracking only; your fitness tracker should be more accurate and include other fitness tracking features. 

Before picking any fitness tracker, you should consider a few things that help you get a worthy tracker. 

1- Accuracy

For every athlete or any fitness lover, the accuracy of a fitness tracker mattress is a lot. Without accuracy, a fitness tracker is just rubbish. As a fitness-focused person, you have to invest a little more in getting an accurate calorie tracker. 

If your fitness gadget gives accurate insights into your performance, then it’s very useful device to measure your wellness and goals. Not just that, you can keep an eye on your weak points and work on them to beat your goals. 

Brands like Fitbit, Garmin, and Apple manufacture accurate trackers, but these brands are also more expensive than the rest. 

2- Other Health Features

To maintain a healthy lifestyle, you only have to measure calories but also keep an eye on your nutrition, sleep, HR, stress, and other such wellness features. 

So make sure that your fitness tracker contains all the essential health features that help you achieve your fitness goals. 

3- Battery Life

A fitness tracker with good battery life helps you keep track of your goals 24/7. If you track goals for a long time, you will get more accurate results than tracking health in increments. 

Especially if you’re a guy interested in outdoor activities, then it’s a difficult task to charge your fitness tracker every night. So, you should pick a fitness tracker that gives up to 7 days of battery life. For a routine 3 days of battery life is also sufficient. 

4- Design & Comfort

Design factor also matters a lot. Some people are design-conscious; we have put this factor here. The majority of fitness tracker comes with a sleek design which is best compared to bulky trackers. 

If you have a person with a small wrist, then you should consider a pick a lightweight tracker. Such fitness trackers give a comfortable experience, so you can measure your wellness at night as well. 

Which Is The Best App to Track Your Calories

tracker for weight loss

Calories tracking needs a legit app that shows you A-Z information of your daily calories burned. Few Calories tracking app performs very well and suggests you proper nutrition plans according to your fitness routine.

So you should use a specific calorie tracking app along with a built-in trackers app. Below are some favorite nutrition apps that you should try.

1- MyfitnessPal

This is one of my favorite nutrition apps, with over 11 million food in their database. Myfitesspal tracks your calories and suggests you some food accordingly.

Similarly, you will get motivational workout tips from experts that inspire you and helps you to continue your fitness journey.

Get MyFitnessPal

2- Loss It

Here comes a Loss app, a most insane app for the fitness lover. But, if you want to lose weight, then you should try it. In this app, you can set your fitness goals, track your food and water, macro tracking, and much more. In short, here, this app has all the tools that help you to lose weight.

Get Lose It App

3- Nutritionix

it’s clear from the app’s name. You can track your calories and get proper nutrition plans. This app has a straightforward and easy-to-use interface, as there are not many options.

Nutritionix also helps you to build custom recipes that you can do back and edit for future logging. Secondly, you can share a food log with the Coach portal.

Get Nutritionix 

How Fitness Trackers Measure Calories

Fitness trackers are two methods to measure calories burn most of the time. The first method is using a PPG sensor that calculates your heart rate and takes the user’s height, age, weight, etc., to estimate the energy expenditure of users.

Secondly, an accelerometer is used to measure the movement of the user’s body during workouts, exercise, or any physical activities that help measure calories burned. Study shows that a fitness tracker that uses an accelerometer has more accuracy, like the Fitbit tracker that measures energy expenditure based on an accelerometer.


Which One Is The Most Accurate Steps Tracker?

According to research done by CNBC, the Fitbit tracker gives more precise steps results. Their previous Fitbit HR was very accurate in measuring steps. They also said that most fitness trackers tested give values very close to the actual one. So there is not a big difference between these trackers.

Which One Is The Most Accurate Heart Rate Tracker?

Heart rate accuracy is one of the things that makes fitness trackers more valuable. According to research performed by Cleveland Clinic, the Apple watch gives 90% heart rate accuracy compared to the rest of the brands. They have tested different heart rate trackers and compared results with EKG machines, and only the Apple watches give precise values nearer to actual results.

Final Words

No doubt, as a fitness lover, you want the tracker that gives the best and accurate results of your daily routine. Therefore, we also have collected the above calories tracker after having deep research.

Fitbit Sense is at the top of the ranking as it uses a Fitbit App. This app can determine an estimation of your calories burned.

If we talk about Fitbit Charge 4, it’s the most affordable fitness tracker out there. So if you have a tight budget, you can go with it.

Lastly, I hope you will enjoy this article. It will be a great appreciation for us if you pick any tracker from our list. This also helps us to make some pocket money.

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