Hi dudes,
Haven't tried these, but I do know that the more variables are measured by a given device (eg heart rate, pulse, temperature, skin conductivity, blood pressure, brainwaves), the more accurate its rating will be. Also, anything that provides us with feedback that we can see or hear will show faster results.
Best,
AR
PS re: https://www.superbetter.com/sign_in    -Why do you have to sign up in order to see the stuff? ...I think the answer's here:
"As CEO of enovate, John grew the company to over 20 employees who built several consumer research and tracking tools used by many of the largest consumer brands in the world, including Nike, Coca-Cola, Unilever, and BMW."

Not for me thanks  :  )