s/Ask HN: Who is making passive income?/Ask HN: Tell me how you're making some extra cash so I can head into direct competition with you./g

How passive are you looking for here?

There's a biiiiig difference between genuinely passive "no work required; cash just turns up", 1-4 hr a month maintenance-mode businesses, the classic 4 hour work week, and even (I've seen people refer to this as "passive income") 1-2 hours a day side-businesses.

I made an app (in a weekend) to view upcoming train schedule for my country public train service, been earning averagely $0.50 everyday without doing anything at all. Not a life changing amount but it covered my website domain/hosting cost.