The best fitness trackers to count steps, keep track of calories burned and monitor heart rate, from Fitbit to Amazfit ...

B07MSYTQNM Also Read: Best Fitbit watches for women: 6 top picks for overall health ... This ultra-thin and removable tracker hides in bands, pendants and bangles, which makes it versatile.

The Oura Ring 4 has just been released — and it’s more comfortable and sleek to wear, but not smaller. It’s noticeably way ...