AT A GLANCE: QUICK RATINGS
Heart Rate Functionality
Ease of Use
Where To Get It
A Deep Dive Into Polar A370
The Polar A370 builds on the brilliant A360 (4.5/5 Star Review) adding some great new features including:
- advanced sleep tracking,
- 24/7 heart rate (HR),
- GPS sharing, and
- HR broadcast (Bluetooth).
The Polar A370 is one of the best activity trackers on the market with a high quality colour display and changeable wrist straps. This review of the Polar A370 has been written and prepared by Tristan Haskins aka CardioCritic.
Who Is It For?
The Polar A370 is for anyone looking to improve their fitness with the help of a stylish, functional and motivational activity tracker. It’s not an out and out performance monitor as it doesn’t have an internal GPS (although it can piggy back share the GPS in your phone).
If you want to do that take a look at the new Polar M430. The A370 supports Polar dozens of sports profiles so you can keep track of your exercise whether it’s cycling, running, rowing, weightlifting etc.
It does everything you’d expect for a top of the range fitness band including:
- steps counting,
- time to move alerts,
- smartphone notifications,
- off the wrist HR monitoring, and
- daily calorie burn.
Polar have been leading innovation in monitoring heart beats since 1976 – we have loads more reports of Polar Fitness bands and HR monitors here.
Polar A360 vs A370
Cosmetically, the Polar A360 and this A370 are almost identical but there’s several new technical features that justify the extra cost.
- 24/7 Heart Rate Monitoring option – your heart rate is recorded throughout the day.
- Daily summary (found in My Day) providing feedback on lowest heart rate (resting HR) for both DAY and NIGHT plus maximum HR. Having resting heart rate for day and night is unique and useful feature not found on any other monitors I am aware of.
- The A370 has a sample rate of 5 minutes, however, when it recognizes that you are exercising it increases this to a higher resolution (similar to regular exercise mode e.g 1 second) to give better heart rate representation throughout unplanned training activities.
- Heart Rate Broadcast – transmit your heart rate to any compatible device. For example, Polar M460, M450, iPhone or Android phone running Polar Flow, Strava, Endomondo etc.
- Advanced Sleep Tracking using Polar’s new Sleep Plus algorithm providing a more accurate representation of your sleeping patterns.
Main Features and Functions
Product Photos (from Polar)
I will be adding my own photos of the Polar A370 once I have finished testing the watch. In the meantime, please accept these Polar marketing department photos. This one demonstrates the following
- Polar A370 smartphone alerts
- One of the many watch face alternatives
- Heart Rate Zone training
In Exercise Mode you get to select the exercise that most closely reflects your work out. There are over 100 different sport profile that can be loaded in the A370.
Les Mills Training Programs
Recently Polar added dozens of Les Mills training profiles. If you’re not familiar with the world’s most popular online work out programs, please visit Polar Les Mills information page.
(Click or tap below to expand)
My Day Summary
The My Day screen is a summary of your daily activity with calories burnt, steps taken etc. It now includes heart rate data acquired throughout the day. This daily heart rate summary gives resting heart rate for both DAY & NIGHT and maximum heart rate
Speed & Distance while Training
The A370 can share your smartphone’s GPS. This useful feature provides accurate speed and distance data to your exercise sessions without the need or cost of it’s own built-in GPS. As well as GPS sharing the A370 features an internal accelerometer providing reasonably accurate speed / distance data while running on treadmill or outside without GPS sharing.
Heart Rate in 5 Zones
Polar has been involved in heart rate monitoring since 1976 … that’s something we shouldn’t forget about. They have decades of experience working with elite athletes analyzing their heart rate while they train and recover. The Polar A370 takes advantage of their experience utilizing Polar’s 5 x Heart Rate Zone system to help you understand the training intensity and its potential fitness benefit.
Polar Flow APP
Polar’s Flow APP is one of the primary reasons why you might want to consider the A370. Doing the exercise is one thing, but understanding what benefit you can hope to receive from your training is another thing.
That’s where the Polar Flow APP comes in. Polar’s unique Training Benefit feature provides plain English explanation of what you achieved in your training session.
24/7 Activity Tracking
Track your activity 24/7 and get practical support to help you achieve your individual daily activity goal. The daily goal is set based on one of 3 levels of activity you choose when setting up the A370 as shown below.
At anytime in the day you can see your progress to achieving the goal from the bar under the time of day view (default). If you would like more details you can enter the “My Day” view to see precisely what you’ve done (note, watch shown is the A360, but screens are very similar)
And another tap will show you what more you need to do to achieve your daily goal from either standing, walking or jogging, as shown below
When was Polar A370 Release Date?
The release date of the Polar A370 was June 2017.
Is the Polar A370 waterproof?
Yes, up to 30 meters deep.
You can wear both A360 and A370 while swimming or taking a shower. This Polar fitness watch will still be able to function. It can still count steps, track how many calories you burned and pinpoint your GPS (when tethered off your phone).
But, just note that the heart rate measurement may not be as accurate while you’re in water.
How do I sync my Polar A370?
It’s actually quite easy.
- Open up the Flow app on your smartphone.
- Take out your A370. Press the button on the side and hold it. You should see the word “searching” pop up on the screen a few seconds later.
- After the watch has found the device it should connect to, it should take you through a sequence of confirmations: from Searching > Connecting > Syncing.
- Once it has successfully finished pairing, it should show the word “Completed.”
How do I reset my Polar A370 fitness tracker watch?
You only need to reset if you are experiencing technical difficulties and have tried all other solutions.
Because resetting means that you’ll lose all the collected fitness data, and you’ll have to set it up like a brand new tracker again.
If it’s your last resort, follow these instructions below:
- Take out your A370 fitness watch and go to Main Menu > Settings > Power Icon.
- The words “Turning off” will show. Press the power icon again and hold for 5 seconds.
How do I change the time on my Polar A370 fitness tracker?
- On your new Polar A370 watch, tap on Main Menu > Settings > Watch, Time and Date
- Select Time:
- Time 1 is to set your local time’s format in terms of hours and minutes
- Time 2 is to set the time for another time zone
How do I update my Polar A370 fitness band?
Unfortunately, it doesn’t happen automatically, but you do get notified whenever there is a firmware update.
There are two ways:
If you downloaded the Polar Flow mobile app, then the app will let you know when it’s time to upgrade and will guide you through it.
Otherwise, you can connect your A370 to your laptop with the USB cable when it tells you to update. FlowSync will sync all your data, then ask you if you want to update.
Note that it might take a while (maybe 20 minutes?) for the update to happen. Afterwards, it will restart itself.
That’s when you know if you can start tracking activity like normal again.
Next Model UP
If the NO CHEST STRAP option brought you to the Polar A370, Polar’s other products with wrist-based HR is the M200 (intro level GPS running watch.
Next Model DOWN
That’s an easier question. The next model down is the Polar Loop 2. Fairly similar tracking functions like steps, calories and inactivity alert, but without the built-in HR sensor. The Loop 2 is an attractive and discrete band for those looking to increase everyday activity.
Similar Alternative Fitness Bands
The Vivosmart HR & Charge 2 feature a barometric pressure sensor that provides stairs climbed feedback not found on the A370. Both provide OFF the WRIST pulse monitoring and 24/7 tracking.
They are ALL very good fitness bands, they all record HR to a reliable and accurate level, they all give an indication Vivosmart HR+f sleep duration & quality and they all motivate you to move throughout the day…
Update Oct 2017 > Garmin have just released their new Garmin Vivosport fitness tracker. Replacing the Vivosmart HR+, the Garmin Vivosport features built-in GPS, wrist based pulse rate, dedicated running functions (auto-lap, pace alerts etc) a full colour display, VO2 max, Stress tests and much more.
CardioCritic have awarded the Garmin Vivosport Best on Test in tracking category and expect it to be one of the best selling fitness trackers. Other solid options include:
- Garmin Vivosport – voted Best In Class – a sleek, discrete fitness watch with GPS and wrist based HR
- Garmin Vivosmart 3 – top of the range tracker with VO2 Max, Fitness Age, Stress score and more
- Garmin Vivosmart HR – replaced by the Vivosmart 3 (above) but still a highly recommended fitness band
- Fitbit Charge 2 – hugely popular best selling tracker of 2017 and 2018
If you’ve got this far then you’ll know by now that CardioCritic analyzed this Polar A370 very highly. The only feature missing found on other similarly priced fitness trackers is STEPS CLIMBED.
It’s not a feature I really find that useful, but some people may have a reason for wanting it. I certainly wouldn’t allow that one omission put me off buying this 5/5 Star Review Polar A370.
Last Updated on May 2, 2019