I've been using this website on my phone then setting my alarm based on the output and it has been great. I can't say if it's a placebo effect or if the science

I've been using this website on my phone then setting my alarm based on the output and it has been great. I can't say if it's a placebo effect or if the science is correct but I feel less sluggish when I wake up and get going more easily so I'll keep using it!