It'd be very hard to determine ones spiritual state, with or without a phone I agree, I also agree with your sentiment about devices having a negative impact when used in negatively habitual ways, those are things I cannot solve.

Sahha isn't about phone usage though (however one of the 84 ML features is a proxy for such things), Sahha uses the device mostly as a way to capture some behavioral data points (hence the passive element of it).

I hope that helps your understanding!