The Polar Loop is a capable heart rate tracker, but its activity tracking software stops it from being a Whoop-killer

The Whoop rival tested.

I tested Polar's mid-budget smartwatch against a Garmin Forerunner – and it fell down in one key area

The Polar Flow app just isn't as intuitive as Garmin Connect.
ZDNet

Polar adds personalized fitness subscription to its smartwatch app, like Garmin's

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Android Authority

Polar's new minimalist fitness band is a subscription-free alternative to Whoop

Polar has launched the Polar Loop, a minimalist fitness band without a display or a subscription fee. The device tracks heart rate, activity, sleep, and recovery and syncs data to the Polar Flow app.