Polar A370 Fitness Tracker (Medium/Large, Black)

Model #90064907

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Vibration Motor Yes
Sensors Optical Heart Rate
OS Compatibility macOS 10.6 or LaterWindows XP or LateriOS 7 or LaterAndroid 4.3 or Later

Packaging Info

Package Weight 0.35 lb
Box Dimensions (LxWxH) 4.5 x 3.8 x 3.15"


Dimensions 0.5 x 0.9" / 13.5 x 23.5 mm
Weight 1.3 oz / 37.3 g
Operating Temperature 14 to 122°F / -10 to 50°C
Splash Proof Yes
Water Resistance Depth 98' / 30 m
Material Polycarbonate, Polyurethane, Silicone, Stainless Steel


Display Size 0.51 x 1.06" / 13 x 27 mm
Display Type TFT LCD
Screen Resolution 80 x 160
Touchscreen Yes
Watch Crystal Material Glass


Ports Micro-USB
Wireless Connectivity Bluetooth 4.0 LE


Estimated Battery Life 4 Days (Activity Mode)4 Days (Heart Rate Mode)13 Hours (Training Mode)32 Hours (Training Mode) 13 hours in Training Mode is with GPS on, and 32 hours is with GPS off.
Rechargeable Battery Capacity 100 mAh
Charging Time 0 to 2 Hours


Band Circumference 5.5 to 7.9" / 140 to 200 mm
Band Material Silicone
Expert Reviews
Pc magazine.34972991
27 November 2018

The fairly priced Polar A370 isn't the most attractive fitness tracker, but it records training sessions and daily activities with aplomb.

  • +

    Continuous and accurate heart rate monitoring. In-depth sleep analysis. Can create custom training programs. Waterproof. Competitively priced.

  • -

    No onboard GPS. Clunky design. Grainy screen.

Tom s guide.32823298
3 July 2017

Polar's A370 fitness tracker gets a boost from continuous heart rate-monitoring, connected GPS and and a colorful display, but the GPS is wonky.

  • +

    Large, colorful display, Accurate heart rate-tracking during outdoor workouts, Useful sleep insights, Waterproof

  • -

    Connected GPS can be unreliable, Battery life could be better, Too expensive for what it offers

2 August 2017

Polar's A370 is a marked improvement on last year's tracker. The shift to more day-to-day wellness with the 24x7 HR will appeal to many, as will the sleep monitoring. The optical HR sensor is better, but still not perfect, but connected GPS definitely makes this more appealing as a fitness device.

  • +

    24/7 tracking, Added sleep smarts, Connected GPS

  • -

    Iffy Bluetooth connectivity, HR accuracy still slips, Chunky (but not all that funky)

7 June 2017

At first glance, one might think that the A370 is just a modest update, potentially uncompetitive. But in reality it’s actually more than might meet the eye. By adding in the 24×7 HR tracking, the HR rebroadcasting, and connected GPS functionality, they both catch-up to competitors, but actually...

10 January 2018

Uncomfortable, chunky and pricy for its features, the Polar A370 is an easy pass

Expertreviews co uk.33706088
29 November 2018

Polar A370: Uncomfortable, chunky and overpriced, the A370 is a rare misstep from Polar

  • +

    The Polar Flow app is excellent, Micro-USB charging

  • -

    Overpriced, considering its features, Questionable build quality, Unattractive design, No GPS

Techradar uk.32817471
30 November 2017

A smarter-than-average fitness tracker that can GPS track your runs and walks with the help of a phone. Battery life is relatively poor, though, and it’s bulkier than much of the competition.

  • +

    Phone notifications, Can GPS track runs with the help of a phone, All-day HR tracking

  • -

    Only 2-day battery life with all features switched on, Chunkier than the competition, GPS not in-band

User Reviews
B h photo.34921152
4 July 2018

Researched this a lot before purchasing, since there are several similar options out there. Very happy with this choice, synchronizes flawlessly once set up (you MUST follow the provided instructions to the letter).I like Polar software for monitoring activity on mobile app and on the cloud.

11 December 2017

It is an awesome watch, easy to use. If used frequently you will have to charge it every 3 days approximately (with notification on), if not battery will last for about 4-5 days. Beautiful and conformable, definitely will recommend it.

B h photo.34921152
6 March 2018

It's a great fitness tracker, works on almost every kind of training. The battery lasts up to 04 days and i'm using this for weight lifting.

28 November 2017

Great product. My wife suggested this activity tracker as her trainer recommended it to her. Said that it is more accurate than competitors. Only issue I had was The touchscreen was a bit slow on response time. Bluetooth connectivity to smartphone is simple and transfer to app is quick.

28 July 2017

decent ..... not my favorite will be going back to my Tom Tom.... I really hate the fact that the screen goes black and I have to push the button to see my heart rate...so annoying!!

25 July 2017

I love polar and I feel it's always been the most accurate device but now it has a slick look and tyhry added the sleep tracking. Love it so far!

20 October 2017

Its sleep tracker isn't accurate at all; both the online app and phone app are not user-friendly; you can't see in-depth detail about what sleep it does track; if you need to edit your sleep record because the tracker didn't do it correctly, you can only change the slider by one hour; the battery...

B h photo.34921152
25 September 2018

Unfortunately it is constantly losing the GPS link to my iPhone. That makes it next to useless as a running watch. It also will not sync on occasion, last time it was out for three days before finally syncing up.

4 May 2018

Lovely colour great for summer x

22 February 2018

I hate that i had to set up my day and time throughthe computer, you just cant adjust it on the hand set like it should be

Product Highlights
  • Tracks Distance, Steps, Calories Burned
  • Wrist-Based Heart Rate Data
  • Smart Coaching
  • GPS via Phone
  • Sleep Monitoring
  • Smart Notifications
  • Water Resistant Up to 98'
  • Battery Lasts Up to 4 Days
Average Expert Score
Average User Score
In The Box
  • Polar A370 Fitness Tracker (Medium/Large, Black)
  • Micro-USB Connector
  • Limited 2-Year Warranty
Still Have Questions?
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