Advice not actionable – Entrain Review

While this app offers the output of a mathematical model, I can't find any real-world use for it. This app more or less advises you to turn your lights on and off to match the time zone you are traveling to. Brilliant insight, who knew. But should I sleep with the lights on? Or stay up all night reading? Bizarrely, the app doesn't provide guidance on the actual question of when to sleep. Without this, I'm not sure what the usefulness is.
Review by Dffghjjkkk on Entrain.