@debate507 I have the Oura ring and have had it for 2 years. I’ve been losing weight for 18 mos. 5’1”, 42 years old.
My calories burned per day according to the ring at 165 lbs was 2,020 cals, at 135-130 lbs it is 1,960 cals. 80 cal difference of ACTUAL burn.
TDEE calculator says 1,615 cals...