Back on this topic again: It's crazy meditation apps rake in so much cash... "hey bro, pay me $10 a month to tell you to sit in the corner and be quiet for twenty minutes."
At least period calendars make a little more sense, as far as tracking regular normal human function
I should make a piss/shit timer app. You update it every time you eat/drink and also update it with every time you shit/piss. Before long, it starts predicting : hey bro, you're gonna need to shit in 30 minutes