Polar's new A370 premium fitness tracker has some small but important feature upgrades over the A360: It adds 24/7 continuous wrist-based heart-rate tracking and the company's Polar Sleep Plus analytics.

Adding continuous tracking heart-rate monitoring to its list of features, the A370 is a modest upgrade over the earlier A360.

Heads up – April 8th, 2019! The Fitbit Alta HR (the one with the optical HR sensor) is currently $40 off – down to $89 (or Amazon here )! This is the best price we've ever seen for this unit, and the lowest price we've ever seen for a HR enabled mainstream activity tracker.

Polar's new A370 fitness-tracking wristband is a course correction from its predecessor, the A360 , which was lacking in a few key areas. The A370 improves upon the last-gen model, with continuous heart-rate monitoring, GPS (sort of), an easier-to-fasten band clasp and a new sleep-tracking tool...

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

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!!

The fitness tracker has come a long way since the humble days of the Fitbit Flex, and the Polar A370 is the perfect example. Many of the features once only found in running watches are becoming more of a norm in more basic wearables.

24/7 tracking; Added sleep smarts; Connected GPS

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

Polar is a company known, historically, for making heart rate sensors and hardcore GPS tracking watches - but its new fitness tracker, the Polar A370, is far more mainstream.

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

Très facile à ma?triser; informations qui semblent réalistes. Bon achat!

heart rate not accurate all the time and battery life is very short... not sure why?

great colour

I'm a recent Polar convert. Ever since reviewing the M430 in October 2017 it has been a faithful companion on one wrist on race day. Aside from being a generally brilliant running companion, it also does a great job of highlighting when other wearables I'm reviewing aren't pulling their weight.