The Polar Loop monitors activity, sleep, and heart rate in a design familiarized by Whoop. The key difference is a one-time payment that gets you the device and all its features. Finnish wearable ...

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.

Polar launched its first heart rate monitor more than 30 years ago, setting the standard that all others have been measured against. Now, the company is bringing this technology to its line of sports ...