> who logged sauna sessions via connected apps

It seems you ask participants to log if they went to sauna. Out of curiosity, why is it not simple to also ask for a type?

i was mostly refering to humidity/duration/temperature given that most devices do not report back these values

I'm equally confused as the other person above. Why not just ask participants to report what type of sauna they used? Sure humidity/duration/temp would be awesome to have, but at the very minimum knowing if a dry sauna would get the same results as a traditional steam sauna.