A300Fitness and Activity Monitor

Buy now


Your body and the A300. Designed to move, and made for each other. It's about getting it right and getting there faster. It's for looking good and feeling great. Make your move.

PlayA day with the A300

It Up

A small change can make a big difference. Match your mood and style with vibrantly colored, easy-to-change wristbands. The durable silicone wristband of the waterproof A300 is light and comfortable to wear.


Every jump, skip, hop, walk and run counts. The A300 shows your steps, distance, and burned calories, and motivates to reach your activity goal. If you stay still for too long, the A300 will vibrate telling you it's time to move again.


Train to your own beat with Polar H7 heart rate sensor and make sure your every move is counted for. Finish strong and feel great! Complete each training by analyzing results in Polar Flow web service and app.


Getting enough quality sleep is important for your wellbeing. The A300 automatically clocks both the moment you start sleeping and wake up, and wakes you up with a gentle vibration. Follow your sleeping patterns in Polar Flow to find the right balance of training, daily activity and rest.


Check Polar Flow for more details about your daily activity, training and sleep -– it’s both addictive and motivating!

Follow your active choices on a monthly basis in Diary view, including calorie expenditure. See the progress you’re making toward a fitter you.

Flow web service


A Day With The A300


Fitness and Activity Monitor

  • 24/7 Activity Tracking

    Tracks your daily activity at different intensity levels, and shows steps, distance and burned calories.

    Activity Goal

    Your daily activity goal and guidance on how to reach it.

    Activity Benefit

    Feedback about your daily, weekly and monthly activity.

    Fitness Test

    Tells you exactly how your fitness is progressing by measuring your aerobic fitness at rest and evaluating your maximal oxygen uptake.

  • Heart Rate

    When paired up with Polar H7 heart rate sensor, measures your every heartbeat and lets you know if you’re mostly burning fat or improving your fitness. Gives the most accurate calorie burn in heart rate based training.

    Smart Calories

    Shows exactly how many calories you've burned.

    Inactivity Alert

    Vibrates when you've been sitting still for too long.

    Sleep Duration And Quality

    Automatically tracks your sleep time and quality. See and learn from your sleeping patterns in Polar Flow web service and app.

  • Polar Flow web service and app

    Free online community and service that helps understand the impact of your activity and see the long term progress you make.

    Changeable Wristband

    Vibrantly colored wristbands are easily changed to reflect your mood and style.

    Simple Charging

    Charges conveniently with a simple plug and play USB.


    Track your total calorie intake and expenditure by connecting with MyFitnessPal app (iOS only).

  • Smart Coaching
    • Fitness Test

      Fitness Test

      Polar Fitness Test measures your aerobic fitness at rest in just five minutes. The result evaluates your maximal oxygen uptake (VO2max). Fitness testing will motivate and inspire you to start, maintain or increase physical exercise.

    • EnergyPointer


      EnergyPointer is an easy-to-use feature which tells you during exercising if the main effect of your training is fat burning or fitness improvement.

    • Heart Rate Zones

      Heart Rate Zones

      Select and monitor the intensity of your training easily with heart rate zones and follow heart rate based training programs. The default heart rate zones are based on your maximum heart rate: very light (50–60% HRmax), light (60–70% HRmax), moderate (70–80% HRmax), hard (80–90% HRmax) and maximum (90–100% HRmax).

    • Smart Calories

      Smart Calories

      The most accurate calorie counter on the market calculates the number of calories burned. The calculation is based on your individual data: your weight, height, age, gender and the intensity of physical activity.

    • Training Benefit

      Training Benefit

      Get motivating feedback immediately after exercise by syncing your A300 with Polar Flow app or web service.

  • Activity features
    • Activity Guide

      Activity Guide

      Activity Guide shows you different ways to reach your recommended daily activity goal and tells you how active you've been during the day.

    • Activity Benefit

      Activity Benefit

      Activity Benefit gives you feedback on a daily, weekly and monthly basis. The more you move, the greater the health benefits are. You can check up on how you're doing either from your smartphone or from the web.

    • Activity Tracking 24/7

      Activity Tracking 24/7

      24/7 activity tracking registers your daily activity at different intensity levels. A300 tracks your steps, calories and sleep time, and notifies when you’ve been inactive for long periods of time.

    • Activity Zones

      Activity Zones

      Activity Zones track your daily activities on five intensity levels: resting, sitting, low, medium and high. You can see how much time you spend on each level in Polar Flow web service and app.

    • Sleep Duration and Quality

      Sleep Duration and Quality

      A300 tracks your sleeping time automatically from when you lie down and your body movements slow down. By showing you the amount of restful versus restless sleep, Polar Flow gives you a detailed look into how you sleep at night. You can see if your sleep’s affected by any changes in your daily life.

    • Inactivity Alerts with Vibration

      Inactivity Alerts with Vibration

      A300 gently vibrates when you have been sitting for too long.

    • Steps and Distance

      Steps and Distance

      A300 counts your steps taken during the day and the distance based on the steps.

  • Training features
    • Advanced Analysis in Polar Flow Web Service

      Advanced Analysis in Polar Flow Web Service

      You can easily analyze every detail of your training in Polar Flow web service and gain a deeper insight into your activities with plenty of possibilities to learn from what you do.

    • Training Targets

      Training Targets

      Create detailed training targets in Polar Flow web service and sync them to your A300. During training you can easily follow the guidance on your wrist. When you are out of the right HR zone, A300 will vibrate as well as give a visual and audible alarm.

    • Training Diary

      Training Diary

      Follow your activity and plan future training sessions. Choose a month or week view, along with a monthly or weekly summary.

    • Heart Touch

      Heart Touch

      See your heart rate without pressing any buttons: just bring the A300 close to your heart rate sensor.

    • Heart Rate

      Heart Rate

      See your current heart rate in beats per minute or as a percentage of your max heart rate.

    • Instant Analysis in Polar Flow App

      Instant Analysis in Polar Flow App

      See your activity and training data at a glance.

    • Sport Profiles

      Sport Profiles

      Your A300 is equipped with different sport profiles to help you follow your progress in different sports. You can add and remove sport profiles to A300 in Polar Flow web service.

  • Technical Features
    • Weight 48 g
    • Thickness 12,7 mm
    • Water resistant (30 m)
    • Display texts in 15 languages
    • Updatable software
    • Memory capacity up to 60 days (with daily activity tracking and 1 hour of daily training)
    • Rechargeable battery
    • Battery life up to 4 weeks
    • Easy sync via Polar Flow app with Bluetooth Smart
    • Mobile app compatibility

      Mobile app compatibility

    • Data transfer to PC and Mac with a custom USB cable

Get started with Polar A300

Heart rate training with Polar A300

Tracking activity with Polar A300

Get started with Polar Flow app